Apertura perforated plasterboards - ESI.infocms.esi.info/Media/documents/Knauf_Apertura_ML.pdf · All Knauf Apertura Perforated plasterboards are supplied with ... metal must be cut

Perforated Plasterboards July 2005CI/SfB 41 (22.3) Rr2

AperturaSound absorption with a unique seamless finish

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Knauf Drywall is one of the country’s leadingsuppliers of gypsum basedmaterials, with two majormanufacturing sites in the UK.

UK manufacturing facilities are setup to adapt quickly to changingrequirements and to offermaximum flexibility to suit specificneeds. All production has theassurance of quality toBS EN ISO 9001: 2000.

Knauf is a family owned company withapproximately 18,000employees worldwide.

Founded originally in Germanyin 1932, Knauf entered the UKmarket in 1988 and wasrebranded Knauf Drywall in 2003.

Perforated Apertura: Circular 10

Perforated Apertura: Random 12

Perforated Apertura: Square 13

Patterned Apertura: Square 14

Patterned Apertura: Slotted 15

Installation Procedure: Board 17

Installation Procedure: Ceiling 20

Installation Procedure: Wall Liner 23

Case Studies 26

Knauf Drywall - delivering solutions to meet customer needs Contents

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Knauf Apertura Perforated & Patterned Plasterboards

Customer Service 0800 521050 Technical Service 01795 416259 E-mail [email protected] Website www.knaufdrywall.co.uk

Knauf Apertura combines

the sound absorption

performance and

attractive design of

perforated gypsum board

with a unique seamless

finish. Seventeen different

styles, two fleece colours

and the Uniflott tapeless

jointing system offer the

designer complete creative

freedom and a quality of

finish that simply cannot

be achieved with tiles.

Acoustic performanceKnauf Apertura plasterboardsare used in conjunction with theKnauf Apertura Ceiling andWall Liner systems to ensureoptimum performance.

Aesthetic solutionsKnauf Apertura plasterboardsare jointed using the tapelessKnauf Uniflott system. This uniquesystem provides a highlydesirable seamless finish whichis both quick and easy to achieve,allowing the pattern to flowthroughout the room.

:: Class C and D sound absorption qualities

:: Total creative flexibility allowing unique effectsto be achieved

:: Proven system used throughout Europe

:: Different fleece colours to suit all designs

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Knauf Apertura uses acombination of four precision-cutedges and the strong KnaufUniflott tapeless jointing systemto provide the stunning seamlessfinish that is unique to thissystem.

A special fixing tool is providedto ensure alignment of circularperforated boards, creating amesmerising effect over longruns. Uniflott application kitsmake it simple to create theseamless finish.

Image ReferenceMain: Audi Forum, Piccadilly Middle: Home Office, London Bottom: Daimler Chrysler Building, Berlin

Unique Seamless Finish


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Stylish Solutions for sound absorptionEvery Knauf Apertura ceilingprovides a Part E Class D soundabsorption performance with avoid depth of just 60mm. AClass C performance can beachieved with many of thedesigns. See pages 10 -15 fordetails.

Retail centres, office complexes,hospitals, schools, showroomsand galleries are typical examplesof where Knauf Apertura hasbeen used to provide a strikingdesign feature with superiorsound absorption to create ahigh quality environment.

Image ReferenceBottom: Audi Forum, Piccadilly

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Whilst offering a far widerrange of design opportunitiesand sound absorptionproperties, Knauf Aperturaoffers the usual refinements ofKnauf plasterboard – and KnaufDrywall’s renowned customerand technical service.

:: Superb quality

:: Durable

:: Easy to install

:: Systems for Ceilings and Walls

:: Manufactured from non-combustible gypsum

:: First class Technical Support

All the benefits of Knauf Plasterboard

Image ReferenceAudi Forum, Piccadilly

All Knauf Apertura Perforatedplasterboards are supplied withfour sharp cut edges to enablethe unique seamless finish to beachieved when jointed withKnauf Uniflott. For straight-line

perforation boards a fixing tool is provided to ensure theperforations are accurately lined up and to control the gapbetween the boards (see page17). The fixing tool is not

required for square and randomperforations but it is recommendedthat a Uniflott application kit isused for all types of board.


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Knauf Apertura Range: Acoustic Performance and Aesthetics Combined

Image ReferenceBürgersaal, Germany

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Knauf Apertura boards aremanufactured from high qualitygypsum with a purity of not lessthan 95%. This makes them light,strong and easy to cut. High qualitypaper liners provide an excellentbacking for direct decoration.

Stringent quality controlprocedures apply to themanufacturing process, in fullcompliance with DIN 18180.

LimitationsKnauf Apertura boards are not suitable for areas which are subject to extremes oftemperature or humidity.

Temperatures over 50oC caninduce a change in state in theboard which would reduce itsphysical performance andserviceability.

Humidity over 90% or subjectionto excessive moisture will alsoreduce the serviceability ofApertura board.

Storage on siteKnauf Apertura boards aresupplied on pallets. Packsshould be lifted with a forklifttruck and stacked not more

than one high on a flat surfaceto preserve stability. They shouldbe stored in a clean, dryenvironment.

Note: If handling manually,consider risks as required byManual Handling regulations1992.

Health and SafetyBoth Apertura board and metal must be cut to length and this should be done in well ventilated areas payingattention to the cut edges of the metal sections which may be sharp.

Knauf Apertura boards are not classified as hazardousunder CHIP3 Regulations 2002and the Control of SubstancesHazardous to Health (COSHH)Regulations 2002.

An on-site risk assessmentshould be carried out prior to use.

For the latest full Material Safety Data Sheets on thespecific products, please refer to www.knaufdrywall.co.uk/themanual.

Fire performanceKnauf Apertura boards aredesignated as Class O underthe Building Regulations 1991,Approved Document B. Theyalso meet BS 476: Part 6:1989, with fire propagationindex I=12 and under BS 476:Part 7: 1987, surface spread offlame, are designated Class 1.

At the time of publication, new European norms forproduct standards under theConstruction Products Directiveare being finalised, and it is anticipated that these will co-exist with the BritishStandards until 2007, whenthey will supercede them.

SiteworkKnauf plasterboards must beinstalled in full accordance withKnauf Drywall’s recommendationsand those of BS 8212: 1995and BS 8000: Part 8: 1994.

FleeceKnauf Apertura plasterboards aresupplied pre-laminated with a45g/m2 fibre fleece, in a choiceof white or black depending onthe desired visual effect.

Edge Profiles

Apertura Perforatedand Acoustic Square

Four sharp-cut edges

Apertura Acoustic Slot

Four half-round edges

HORIZONTAL EDGE HRK

VERTICAL EDGE FK

Image ReferenceMain: School building, Germany Facing: Auditorium, Germany

Knauf Apertura


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Perforated:: Circular straight line perforation (5 designs)

:: Circular double perforation (2 designs)

:: Circular random perforation (2 designs)

:: Square straight line perforation (2 designs)

Patterned:: Square pattern (3 designs)

:: Slotted pattern (3 designs)

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CIRCULAR 6/18*

Area of perforation8.7%

Board sizeWidth = 1188mmLength = 1998mmWeight = 10.7 kg /m2

Article NoWhite Fleece: 00019667Black Fleece: 00019488

*Illustration 1:1 scale

Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassCircular 6 /18, 400mm 0.55 0.83 0.56 0.52 0.37 0.38 Class DCircular 6 /18, 400mm with quilt 0.62 0.83 0.71 0.64 0.42 0.51 Class DCircular 6 /18, 60mm 0.19 0.30 0.74 0.70 0.35 0.59 Class DCircular 6 /18, 60mm with quilt 0.33 0.64 0.99 0.63 0.29 0.45 Class D

CIRCULAR 8/18*





Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassCircular 8 /18, 400mm 0.56 0.84 0.53 0.56 0.43 0.48 Class DCircular 8 /18, 400mm with quilt 0.68 0.93 0.76 0.84 0.56 0.65 Class CCircular 8 /18, 60mm 0.16 0.23 0.67 0.82 0.48 0.69 Class DCircular 8 /18, 60mm with quilt 0.29 0.55 1.07 0.86 0.45 0.56 Class D

CIRCULAR 10/23*




*Illustration not to scale

Void Depth HZ 125 250 500 1000 2000 4000 Perform. ClassCircular 10 / 23 , 400mm 0.56 0.86 0.55 0.57 0.42 0.45 Class DCircular 10 / 23 , 400mm with quilt 0.67 0.94 0.76 0.80 0.55 0.64 Class CCircular 10 / 23 , 60mm 0.19 0.22 0.69 0.80 0.44 0.63 Class DCircular 10 / 23 , 60mm with quilt 0.29 0.58 1.10 0.82 0.53 0.83 Class C

Perforated Apertura: Circular


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Perforated Apertura: Circular

CIRCULAR 12/25*





Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassCircular 12 / 25 , 400mm 0.60 0.87 0.52 0.56 0.43 0.51 Class DCircular 12 / 25 , 400mm with quilt 0.67 0.92 0.75 0.84 0.62 0.73 Class CCircular 12 / 25 , 60mm 0.17 0.21 0.63 0.81 0.46 0.68 Class DCircular 12 / 25 , 60mm with quilt 0.29 0.51 1.12 0.85 0.45 0.58 Class D

CIRCULAR 15/30*





Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassCircular 15 / 30 , 400mm 0.56 0.86 0.51 0.55 0.43 0.50 Class DCircular 15 / 30 , 400mm with quilt 0.66 0.90 0.77 0.83 0.63 0.71 Class CCircular 15 / 30 , 60mm 0.15 0.21 0.62 0.80 0.46 0.63 Class DCircular 15 / 30 , 60mm with quilt 0.29 0.52 1.08 0.87 0.53 0.70 Class C

CIRCULAR 8/12/50*





Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassCircular 8 / 12 / 50 , 400mm 0.62 0.84 0.54 0.54 0.38 0.42 Class DCircular 8 / 12 / 50 , 400mm with quilt 0.65 0.89 0.73 0.77 0.49 0.61 Class DCircular 8 / 12 / 50 , 60mm 0.18 0.25 0.70 0.77 0.40 0.60 Class DCircular 8 / 12 / 50 , 60mm with quilt 0.30 0.61 1.11 0.75 0.36 0.47 Class D

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RANDOM 8/15/20*





Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassRandom 8/15/20, 400mm 0.56 0.83 0.53 0.49 0.33 0.35 Class DRandom 8/15/20, 400mm with quilt 0.64 0.85 0.69 0.62 0.37 0.48 Class DRandom 8/15/20, 60mm 0.19 0.29 0.78 0.64 0.32 0.57 Class DRandom 8/15/20, 60mm with quilt 0.31 0.68 1.02 0.60 0.25 0.40 Class D

RANDOM 12/20/35*





Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassRandom 12/20/35, 400mm 0.55 0.81 0.50 0.44 0.29 0.28 Class DRandom 12/20/35, 400mm with quilt 0.64 0.82 0.67 0.55 0.32 0.42 Class DRandom 12/20/35, 60mm 0.18 0.30 0.76 0.55 0.28 0.50 Class DRandom 12/20/35, 60mm with quilt 0.34 0.69 1.02 0.49 0.21 0.33 Class D

CIRCULAR 12/20/66*





Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassCircular 12/20/66 , 400mm 0.58 0.86 0.50 0.56 0.41 0.50 Class DCircular 12/20/66 , 400mm with quilt 0.66 0.94 0.78 0.85 0.59 0.74 Class CCircular 12/20/66 , 60mm 0.16 0.21 0.62 0.79 0.41 0.69 Class DCircular 12/20/66 , 60mm with quilt 0.28 0.55 1.07 0.85 0.43 0.59 Class D

Perforated Apertura: Circular / Random


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SQUARE 8/18*





Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassSquare 8/18, 400mm 0.57 0.86 0.52 0.59 0.47 0.52 Class DSquare 8/18, 400mm with quilt 0.66 0.95 0.77 0.90 0.67 0.75 Class CSquare 8/18, 60mm 0.17 0.18 0.60 0.81 0.50 0.69 Class DSquare 8/18, 60mm with quilt 0.27 0.53 1.09 0.90 0.52 0.68 Class C

SQUARE 12/25*

6.5





Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassSquare 12/25, 400mm 0.60 0.82 0.48 0.54 0.48 0.51 Class DSquare 12/25, 400mm with quilt 0.65 0.96 0.76 0.88 0.70 0.79 Class CSquare 12/25, 60mm 0.16 0.20 0.55 0.83 0.52 0.69 Class DSquare 12/25, 60mm with quilt 0.28 0.47 1.06 0.89 0.54 0.67 Class C

Perforated Apertura: Square

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ACOUSTIC SQUARE TYPE B4*















Patterned Apertura: Square

Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassSquare B4, 400mm 0.55 0.83 0.63 0.62 0.55 0.45 Class CSquare B4, 400mm with quilt 0.66 0.91 0.65 0.74 0.64 0.54 Class CSquare B4, 60mm 0.12 0.31 0.72 0.82 0.50 0.41 Class DSquare B4, 60mm with quilt 0.35 0.64 0.95 0.79 0.48 0.45 Class D

Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassSquare B5, 400mm 0.49 0.78 0.59 0.53 0.43 0.41 Class DSquare B5, 400mm with quilt 0.70 0.83 0.71 0.63 0.50 0.50 Class CSquare B5, 60mm 0.18 0.54 0.79 0.67 0.38 0.38 Class DSquare B5, 60mm with quilt 0.41 0.77 0.80 0.58 0.34 0.35 Class D

Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassSquare B6, 400mm 0.53 0.78 0.69 0.67 0.58 0.49 Class CSquare B6, 400mm with quilt 0.58 0.92 0.77 0.87 0.64 0.62 Class CSquare B6, 60mm 0.08 0.33 0.68 0.81 0.49 0.45 Class DSquare B6, 60mm with quilt 0.30 0.73 0.96 0.88 0.50 0.52 Class C

ACOUSTIC SLOT TYPE B4*





Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassSlot B4, 400mm 0.43 0.90 0.54 0.52 0.40 0.45 Class DSlot B4, 400mm with quilt 0.56 0.88 0.66 0.68 0.47 0.46 Class DSlot B4, 60mm 0.07 0.34 0.75 0.69 0.39 0.32 Class DSlot B4, 60mm with quilt 0.27 0.66 0.98 0.70 0.40 0.32 Class D

ACOUSTIC SLOT B5*





Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassSlot B5, 400mm 0.45 0.87 0.55 0.49 0.37 0.36 Class DSlot B5, 400mm with quilt 0.57 0.84 0.65 0.64 0.42 0.36 Class DSlot B5, 60mm 0.10 0.36 0.76 0.65 0.35 0.28 Class DSlot B5, 60mm with quilt 0.30 0.69 0.94 0.64 0.38 0.32 Class D

ACOUSTIC SLOT TYPE B6*





Void Depth Hz 125 250 500 1000 2000 4000 Perform. ClassSlot B6, 400mm 0.44 0.90 0.55 0.55 0.45 0.49 Class DSlot B6, 400mm with quilt 0.56 0.94 0.71 0.76 0.56 0.57 Class CSlot B6, 60mm 0.10 0.30 0.73 0.76 0.42 0.29 Class DSlot B6, 60mm with quilt 0.27 0.61 1.05 0.80 0.48 0.40 Class D


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Patterned Apertura: Slotted

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Installation Procedure:: Apertura board page 17

:: Ceiling system page 20

:: Wall Liner page 23

Customer Service 0800 521 050 Technical Service E-mail [email protected] Technical Service 01795 416259 Website www.knaufdrywall.co.uk

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Perforation Size Channel Centres Weight

Alternate Circular Perforation

Straight-Line Square Perforation

First row of boards

Line in centre of room

Second row of boards

Diagonal

Straight

Board Length (mm) Board Width (mm) Walls (mm) Ceilings (mm) Board Weight +Ceiling System

6/18 1998 1188 396 333 ≤ 15 kg/m2

8/18 1998 1188 396 333 ≤ 15 kg/m2

10/23 2001 1196 400 333 ≤ 15 kg/m2

12/25 2000 1200 400 330 ≤ 15 kg/m2

15/30 1998 1200 400 330 ≤ 15 kg/m2

8/12/50 2000 1200 400 333 ≤ 15 kg/m2

12/20/66 1980 1188 396 330 ≤ 15 kg/m2

8/15/20 1875 1200 400 312.5 ≤ 15 kg/m2

12/20/35 1875 1200 400 312.5 ≤ 15 kg/m2

8/18 1998 1188 396 333 ≤ 15 kg/m2

12/25 2000 1200 400 333 ≤ 15 kg/m2

Acoustic Square B4, B5, B6 2400 1200 400 300 ≤ 15 kg/m2

Acoustic Slot B4, B5, B6 2400 1200 400 300 ≤ 15 kg/m2

Straight-Line Circular Perforation

Random Circular Perforation

Apertura Board Installation


The Apertura installationinstructions are split into installingthe Apertura boards themselves,and how to install the differentsupport frameworks for wall andceiling applications.

Careful installation and jointing of the Apertura boards isessential to ensure a seamlessfinish and to achieve acontinuous and captivatingpattern. The instructions in thisdocument, the engineered qualityof the products and our purposedesigned installation kits combineto make installation simple.

The Knauf Installation Kit consistsof two assembly aids with nodulesto fit the relevant perforation anda Uniflott applicator comprisingtubing with plastic nozzle andpistons which can be used onboth sides.

Installation Kits are only requiredfor the following Apertura designs:Circular 6/18, 8/18, 10/23,12/25, 15/30, 8/12/50, and12/20/66.

Uniflott applicators are alsoavailable separately.

Note

Always control the overall image with a building line through thestraights and diagonals of the rows of perforations. Lay perforatedboards on cross joints.

Cutting AperturaWhen cutting Apertura take carenot to damage the fibre fleece.Apertura can be scored with aknife and snapped, or cut with a saw.

Treating the EdgesEdges should be lightlychamfered on the edge using a standard hand sander with 90 grade sandpaper.

Perforated Board MarkingsKnauf Apertura Plasterboardswith straight and staggeredperforations are marked in redand blue on the cut edges. Whenfixing the boards ensure that theedge marked red on one boardis placed next to the edgemarked blue on the adjacentboard. This is the same for boththe long and short edges.

Set the spacing between the perforationsControl the perforation format by sighting out the straight anddiagonal lines of the rows ofperforations. Set the perforationspacing using the assembly aidwhere required. A 3mm gap isleft between boards for jointingpurposes.

Fixing the perforated boardsPrior to fixing consider the friezeeffect required around theperimeter of the ceiling or wall(see page 19). Knauf Drywallrecommend that a three manteam is used for installation work.

Ceilings: Set out the AperturaCeiling System as described onpages 20-22 ensuring the correctchannel spacings are used to suitthe board perforation and size.

When fixing the boards, start inthe middle of the room and workoutwards. 25mm Knauf DrywallScrews should be used at

maximum 200mm centres,placed carefully between theperforations as necessary.Apertura boards are fixedperpendicular to the lower ceiling channels.

Align the first board in the middle of the ceiling and fix asdescribed above. Offer up thenext board ensuring that theboards are correctly lined up and fix, starting with the edgeadjacent to the first board.Continue fixing boards in thismanner, starting with the longedges and then with the shortedges, until the ceiling iscompleted.

Walls: Set out the Wall Linersystem as described on pages23-25 ensuring that the correctchannel spacings are used to suitthe board perforations and size.

When fixing the boards, start atone end of the lining and workalong. 25mm Knauf DrywallScrews should be used atmaximum 300mm centres,placed carefully betweenperforations as necessary.Apertura boards are fixedparallel to the vertical Apertura‘C’ Channels. Align the firstboard as described above andfix. Offer up the next boardensuring that the boards arecorrectly lined up andfix, starting with the edgeadjacent to the first board.Continue in this manner until the wall is completed.

Installation Procedure - Boards

Lightly chamfer the board edges

Cut edges are colour coded for correct alignment

Using the special tool to align the boards

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Frieze optionsa) Flush-jointing to plasterboard -Prior to fixing the Aperturaboards, fix a minimum 100mmwide strip of 12.5mm SquareEdge Knauf Wallboard to theperimeter framework. Chamfer theedge of the Wallboard where itmeets the Apertura board andleave a 3mm gap ready forjointing with Uniflott.

b) Flush-jointing to Apertura - Fix the Apertura board as describedabove, continuing to the perimeter.Mark out the desired position ofthe frieze with a chalk line, andfix low stick masking tape to theinside. Any holes remainingwithin the frieze area can then be filled with Uniflott to create a smooth surface.

c) Raised feature usingplasterboard - Fix the Aperturaboard as described above,continuing to the perimeter. Tocreate the raised frieze, fix a stripof 12.5mm Square Edge KnaufWallboard, at least 100mm wide,on top of the Apertura, through tothe perimeter framework.

Cleaning the jointsAfter completion of the assembly,clean the joints with a dampbrush until no dust remains.

JointingWhen using the applicator, cutthe nozzle to suit the joint widthand squeeze together slightly atthe end to allow the nozzle topenetrate to the full depth of thejoint. Once filled with KnaufUniflott the applicator can beused in a standard sealant gun tocompletely fill the joints. Uniflott isa chemical drying compoundand will set in approximately 90 minutes so ensure that theapplicator is rinsed out with water after use.

When the Uniflott has stiffened in the joints remove any excesswith a jointing knife, beingcareful not to damage the paper.Once the Uniflott has fully setapply a second coat with astandard jointing knife in order toensure a flush joint is achieved.This stage is critical to achievinga perfect seamless finish so careshould be taken to ensure thejoints are completely filled, applyinga further coat if necessary.

If any of the perforations havebecome filled during jointing,clean them out carefully beforethe Uniflott has set.

Tip: Use a quality low stick maskingtape to cover the perforationseither side of the joint, prior tothe application of Uniflott.

Once the joints are completelyfilled and set, sand to a flat andeven finish.

DecorationApply an undiluted coat of KnaufWallboard Primer to the entiresurface to equalise the suction levelsbetween the joints and boards. The surface can then be decoratedusing a foam rubber roller.

Cleaning the joints prior to jointing

Jointing using the Uniflott applicator

Carefully removing the excess Uniflott

Sanding the filled joint

Installation Procedure (continued)

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IntroductionThe Knauf Apertura CeilingSystem uses fast drywallconstruction techniques. Thesystem can accept some degreeof loading from items such aslight fittings, access hatches etc.However, heavier items mayrequire additional hangersand/or channels to accommodateadditional loads. Consult KnaufDrywall Technical Services on01795 416259 for detailedadvice.

This system is designedspecifically for use with KnaufApertura boards to create therigidity required for the seamlessfinish. The use of other supportframeworks may allow movementcausing joints to crack, and maynot provide sufficient spacebetween perforations when screwfixing. Apertura boards are fixedonto a double lightweight metalframework of Knauf Apertura ‘C’Channels and Knauf Apertura ‘U’Channels, suspended by anglesections fixed to the structuralsoffit with soffit cleats.

DesignConsiderationsThis section identifies the areasthat require careful considerationprior to installation. For furtherdetails, contact Knauf DrywallTechnical Services on 01795416259.

SuspensionEnsure the background is suitableto support the weight of thesuspended ceiling and anyadditional fixtures.

Access HatchConsider the need for an accesshatch and any additionalframework required.

Surface FixingsThe weight and leverage of anyfixing prior to construction shouldbe considered.

Support for Joints in OuterFacingsTo back joints in outer boardlayers Knauf Fixing Channel orKnauf Flat Fixing Plate should befitted across the face of all KnaufApertura ‘C’ Channels, securedwith 2 Knauf Wafer HeadJackpoint Screws per ‘C’ Channel.

Corners, Intersections andAbutmentsTo accommodate corners,intersections and abutmentsadditional Knauf Apertura ‘C’Channels will be required.

FixingsEnsure Knauf Drywall Screws areof appropriate length to allowminimum penetration of 10mmthrough steelwork.

Movement Control JointMovement control joints aregenerally recommended atmaximum 10m intervals in straightceiling runs. They should also beinstalled to coincide with anymovement joints in the structure.

Knauf Movement Control jointsprovide up to 7mm of lateralmovement.

ServicesSpecial requirements due to largeducts or services in the ceilingvoid may be required. Whereservices or ducts penetrate,simple details maintain theintegrity of the ceiling.

InsulationWhere insulation has beenspecified to achieve a specificsound absorption performance,25mm Knauf Crown AcousticPartition Roll should be used.

Components

Knauf AngleUsed to form bulkheads,and to fix soffit cleat to primarysupport channel.

Knauf Apertura ‘U’ MountingBracketsAn optional fixed hangerwhich is screw-fixed directlyto the structural soffit.

Knauf Apertura ‘C’ Channel Forms the main supports.

Knauf Apertura ‘C’ ChannelConnectorFor connecting straight lengths of‘C’ Channel.

Knauf Apertura ChannelIntersection ConnectorLocates and connects‘C’ Channels.

Knauf Apertura ‘U’ ChannelPerimeter Channel providingsupport at the junction ofceiling to wall.

Knauf Soffit CleatSoffit Cleat to fix Knauf Angle tostructural soffit.

Knauf MF Nut and BoltFor fixing Angle to Soffit Cleat.

Knauf Apertura Ceiling System

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GeneralKnauf Apertura Ceiling Systemmust be installed in accordancewith Knauf Drywall’srecommendations and therecommendations of BS 8212:1995 and BS 8000: Part 8: 1994.

Perimeter ChannelKnauf Apertura ‘U’ Channelsshould be secured to the walls atthe required heights, with fixingsat maximum 600mm centres and50mm from ends of channels.The top of the Knauf Apertura ‘U’Channel should align with theunderside of the upper Knauf ‘C’Channel.

Knauf Apertura ‘U’ Channelsforming the perimeter donot need to be joined to theupper Knauf Apertura‘C’ Channels, but should betightly butted together.

SuspensionSelect the fixing centres suited to the ceiling loading. (SeeLoading Information below).

Fix Knauf Soffit Cleats to thestructural soffit with suitablefixings. Knauf Angle is used tojoin the Knauf Soffit Cleat to theupper ‘C’ Channels.

Upper ‘C’ ChannelsThe centres of the upper KnaufApertura ‘C’ Channels dependon the loading requirements.(See Loading Information tablebelow).

Knauf Angle should be fixedstaggered to either side of theupper Knauf Apertura ‘C’Channel using two KnaufJackpoint Wafer Head Screws.The upper Knauf Apertura ‘C’Channels should lay on the upperflange of the perimeter channel.

Lower ‘C’ ChannelsThe lower Knauf Apertura ‘C’Channels should be positionedwithin the perimeter channels tocoincide with the abutments ofthe boards, which will be fixedlater. For lower channel centresrefer to the table on page 17.

Connect the lower Apertura ‘C’Channels to the upper Apertura‘C’ Channels by means of KnaufApertura Channel IntersectionConnectors. These connectors fitover the upper Apertura ‘C’Channels and snap-fix into thelower Apertura ‘C’ Channels.

Movement Control JointsCreate movement control jointswhere ceiling runs exceed 10m,coinciding where possible withmovement joints in thesurrounding structure.

Note: Appropriate PPE should be worn.

Fixing perimeter channel

Attaching Knauf Angle to joists

Fixing Knauf Angle to Upper Apertura ‘C’ Channel

Connecting Lower and Upper Knauf Apertura ‘C’ Channelwith Knauf Apertura Channel Intersection Connectors

Installation Procedure

Loading InformationTotal load including weight of ceiling system (kg/m2) - This includes any additional lighting/ventilation system

Fixing centres for: 15 20 25 30 35 40 45 50

Suspension Hanger (mm) 1325 1250 1175 1100 1025 950 875 800

Upper ‘C’ Channel (mm) 1325 1250 1175 1100 1025 950 875 800

21


Section through CeilingBasic assembly of the AperturaCeiling System.

Knauf Apertura Ceiling System - Application Details

Structural Soffit

Knauf Angle

Upper Knauf Apertura‘C’ Channel

Knauf Apertura ChannelIntersection Connector

Knauf Apertura board

Lower Knauf Apertura ‘C’ Channel

Knauf Apertura ‘U’ Channel perimeter support

Knauf Angle

Upper Knauf Apertura ‘C’ Channel

Knauf Apertura ChannelIntersection Connector

Lower Knauf Apertura ‘C’ Channel


22

Abutment to WallSupport at the ceiling perimeter is provided by Apertura ‘U’ Channels,screw-fixed to walls level with the lower Apertura ‘C’ Channels. Thisdetail shows fixing to a masonry substrate.When fixing Apertura ‘U’Channels to the wall care should be taken to ensure that the selectedfixing is suitable for the substrate in question.

IntroductionKnauf Apertura Wall Liner can beapplied to the majority of masonrybackgrounds, depending on thecondition, to a maximum height of 4000mm. For higher linings,contact Knauf Drywall TechnicalServices on 01795 416259.

Knauf Apertura Wall Liner isspecifically designed for use withKnauf Apertura boards to createthe rigidity required for theseamless finish. The boards arefixed onto a lightweight metalframework of Knauf Apertura‘C’ Channels fixed to Knauf ‘U’Mounting Brackets andKnauf Apertura ‘U’ Channels.

The system provides a variablestand-off from the wall of between30 and 125mm. This makes itcapable of overriding substantialirregularities in the background.

Pre-treatment of the background is not required. Under goodbuilding practice, however, anydeleterious deposits such asmould, oil or grease, should beremoved as a precaution.

DesignConsiderationsThis section identifies the areasthat require careful considerationprior to installation. For furtherdetails contact Knauf DrywallTechnical Services on 01795416259.

Vertical StudsExtra rigidity can be achieved byreducing the centres of the Knauf‘U’ Mounting Brackets to below900mm.

Surface FixingsThe weight and leverage of anysurface fixings should be

considered prior to construction.Knauf Flat Fixing Plate, KnaufFixing Channel or timbernoggins should be added asrequired.

Support for Horizontal Jointsin FacingsKnauf Fixing Channel or KnaufFlat Fixing Plate should be fittedacross the face of all channels,secured with 2 Knauf WaferHead Jackpoint Screws per stud,to support horizontal joints inouter board layers.

Corners, Intersections andAbutmentsConsider the need for additionalchannels to accommodatecorners, intersections andabutments. Also check the fireand sound ratings of abuttingsystems.

FixingsEnsure Knauf Drywall Screws ofappropriate length are used toallow minimum penetration of10mm through the metalframework.

Movement Control JointMovement control joints aregenerally recommended atmaximum 10m intervals instraight lining runs. Theyshould also be installed tocoincide with any movementjoints in the structure.

Knauf Movement Control Jointsprovide up to 7mm of lateralmovement.

ServicesThe cavity between thebackground and the lining maybe used to conceal services.Where services or ductspenetrate, simple details maintainthe integrity of the lining.

Eye Level PatternsPatterns at eye level over adistance should be broken atregular intervals (for example, byfilling perforations with KnaufUniflott) to avoid unwantedoptical effects that may confusethe eye.

Components

Knauf Apertura ‘C’ ChannelWall lining channel usedas the main component in theKnauf Apertura Wall LinerSystem.

Knauf Apertura ‘C’ ChannelConnectorFor connecting straight lengthsof ‘C’ Channel.

Knauf Apertura ‘U’ ChannelForms the floor and head trackin the Knauf Apertura Wall Linersystem.

Knauf Apertura ‘U’ MountingBracketLocates ‘C’ Channel tobackground support.

Knauf Apertura Wall Liner

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GeneralKnauf Apertura Wall Liner mustbe installed in accordance withKnauf Drywall’s recommendationsand the recommendations of BS 8212: 1995 and BS 8000:Part 8:1994, where relevant.

PreparationMark guidelines on the floor andsoffit to establish the positions ofthe floor and head tracks relativeto the stand-off distance required.

Mark vertical guidelines on thebackground to establish the KnaufApertura ‘C’ Channel positions.(See table on page 17).

Depending on the requiredstorey height, mark the wall with the location of intermediateKnauf ‘U’ Mounting Brackets inline with the channel guidelinesand at maximum 900mmvertical centres.

Position service runs and outlets.

PerimeterKnauf Apertura ‘U’ Channelsshould be used for the head andbase along the guidelines usingfixings appropriate for thebackground. Fix at maximum600mm centres.

Vertical ‘C’ ChannelsFix the intermediate KnaufApertura ‘U’ Mounting Bracketsto the background, at themarked positions, using fixingsappropriate for the background.

Offer up the Knauf Apertura ‘C’Channels to engage with theKnauf Apertura ‘U’ MountingBrackets and in the floor andhead tracks. Extend the lengthof Knauf Apertura ‘C’ Channels,where necessary, by usingKnauf Apertura ‘C’ ChannelConnectors. Adjust the channelsfor position and alignment.

Secure the Knauf Apertura ‘C’Channels to the Knauf Apertura‘U’ Mounting Brackets usingKnauf Waferhead JackpointScrews. Depending on thestand-off distance, bend backthe legs of the crimped ‘U’Mounting Brackets so as not toobstruct the fixing of theApertura board.

Fix Knauf Angle Sections atexternal corners and revealswhere appropriate.

InsulationInstall insulation quilt whererequired between and behindthe vertical Knauf Apertura ‘C’Channels. Care should be takento avoid breaks in the insulationwhere possible for continuity,and to prevent the insulationfrom slumping in the cavity.

Installation Procedure

Fixing Apertura ‘U’ Channel to the soffit

Marking position for Apertura ‘U’ Channel

Fixing Knauf Apertura ‘U’ Mounting Brackets

Fixing Apertura ‘C’ Channels to the ‘U’ Mounting Brackets

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Knauf Apertura Wall Liner - Application Details

Knauf Apertura ‘C’ Channel

secured to Knauf Apertura ‘U’

Mounting Bracket

Knauf Apertura ‘U’ Mounting

Bracket with leg snipped and

bent to retain channel

25 x 25mm Knauf Angle

used as reinforcement

25 x 25mm

Knauf Angle

Knauf Apertura ‘C’ Channel

secured to Knauf Apertura

‘U’ Mounting Bracket

Knauf Apertura ‘U’

Mounting Bracket with leg

snipped and bent to retain

channel

External CornerHead and Floor

Internal Corner

Knauf Apertura

‘U’ Channel

Knauf Apertura

board

Knauf Apertura

‘U’ Channel

Knauf Apertura ‘U’

Mounting Bracket

secured to background

and screw-fixed to

channel

25


Knauf Apertura

‘C’ Channel


26

Case StudiesLondon’s first all-new governmentbuilding in a decade, the HomeOffice in Marsham Street, utilisesApertura perforated plasterboardceilings to create an aestheticallypleasing working environment.

In addition to the 45,000m2

complex for 3,400 civil servants,the landmark Home Office Buildingis a focus for mixed-useregeneration of the surroundingarea. The building was designedand constructed by Bouygues UK,Ecovert FM and HSBC Infrastructure.

Ceilings subcontractors GillespiesUK Ltd and Hatmet Ltd installedabout 7,000m2 of Apertura tocomplement the high qualityaesthetic requirements of thebuilding. Apertura not onlyachieves an attractive finish butalso provides high performanceacoustic absorption andminimises reverberation.

Apertura Strikes a Chord at WalesMillennium CentreApertura perforated plasterboardwas given a key role at the WalesMillennium Centre after architectsCapita Percy Thomas selected itas the ceiling finish in the principalpublic areas of the building.

The 31,500m2 centre is anacclaimed performing artscomplex on Cardiff Bay’swaterfront. It boasts twotheatres, two dance studios,residential accommodation,recording studios, shops, cafesand restaurants and functionrooms. The main contractor wasSir Robert McAlpine.

Bristol-based subcontractorsGHT Plastering Services Ltdinstalled 2,000m2 of Aperturacircular 8/18 plasterboard inthe 10-13m high ceilings of thecentre’s north and southconcourses. These haverestaurants, shops and theatreentrances. They provide meetingplaces where visitors can watchimpromptu free music anddrama performances and enjoythe arts in a relaxed, informalsetting.

“

““

The Apertura plasterboard provides a stunning finish andlooks excellent in a large open plan environment such asthe Home Office.

- Neil Hamblin, Gillespies UK

“

Apertura was specifiedbecause the architectswanted something thatwas aesthetically pleasing.The random pattern of thisboard is different fromanything else on the market.

- Michael Dyett, ContractsDirector, Hatmet Ltd

Apertura perforated plasterboardhas become the ceiling of choiceas part of the specification forAudi’s most recent World-widecorporate identity. Apertura isnow featured in 40 Audishowrooms around the UK,including its flagship, the AudiForum in Piccadilly, London.

Chosen for its aesthetics as wellas its acoustic performance,Apertura provides a uniqueseamless ceiling that is visuallyappealing – and significantlyreduces reverberated sound,making for a pleasant businessenvironment.

The Audi Forum was created aspart of a total refurbishment ofan existing building and alsocontains an exhibition centre, aconference venue and an internetcafé. Apertura is one of thespecial building materials used in the refurbishment to achieve a superior, distinctive finish.

ITC Concepts installed Aperturaplasterboard as the ceiling in themain and basement showroomareas of the Audi Forum.


27

Technical ExpertiseKnauf Drywall’s specification team is able to offeradvice and guidance from the design stage, rightthrough to providing on-site support to the contractorduring the installation phase. This is backed up by an experienced phone-based technical support team,comprehensive literature and an award-winningwebsite www.knaufdrywall.co.uk/themanual

You can contact Knauf Drywall Technical Services on01795 416259.

Audible Success at Audi Showrooms

“ “

Apertura enabled us to achieve an impressive ceilingconsistent with the specification and it was easy to use. As the plasterboard is perforated we had to be mindful ofthe light fittings in the ceiling and ensure the perforationslined up properly. However, the Apertura plasterboardwas straightforward to cut and enabled us to accomplisha neat finish around the lights.

- Chris Gardiner, ITC Concepts

Further information is contained within

The Complete Drywall Manual, available

online at our award winning website:

www.knaufdrywall.co.uk/themanual

together with a range of interactive tools

to aid the specifier and contractor.

Customer Service

Freephone: 0800 521 050

Freefax: 0800 521 205

E-mail: [email protected]

Technical Service

Tel: 01795 416 259

Literature

Tel: 08700 613 700

Website

www.knaufdrywall.co.uk

Knauf Drywall

PO Box 133

Sittingbourne

Kent ME10 3HW

Tel: (01795) 424 499

Fax: (01795) 428 651

Knauf Drywall Factory

LocationsRidham DockSittingbourneKent

Queens RoadImminghamN.E. Lincolnshire

© Copyr ight Knauf Dr ywal l 2004

The information given in this document is believed to be current and accurate as at the date of publication, but no warranty expressor implied is given. Updates will not be automatically issued.

As part of our policy of continuous product development, we reservethe right to revise specifications without notice. The informationgiven in this publication is provided for guidance only and is correct to the best of our knowledge and belief. It is inevitablygeneralised and users should satisfy themselves as to the suitabilityfor the specific circumstances in which they seek to apply it.

July 2005Ref: AP1-01

Documents

Apertura perforated plasterboards - ESI.infocms.esi.info/Media/documents/Knauf_Apertura_ML.pdf · All Knauf Apertura Perforated plasterboards are supplied with ... metal must be cut