Introduction

As part of the governments strategy to significantlyreduce energy use in buildings, thereby reducingCO2 emissions new Building Regulations havebeen introduced. These regulations require thatbuildings offer more effective methods of energyconservation and efficency. Reducing heat loss isnowa crucial element in the design and buildprocess; offeringa new challenge to both architectsand developers alike. Building elements thatcontribute to the thermal protection of a structuremust offer a ‘thermal value’ (U Value) as specified inthe Building Regulations Guidance Documents,Approved Document L1B and L2B.

After extensive research and development, Envirograf®have launched a unique triple insulation system. TheThe Envir<e>Flex System offers acoustic, fire andthermal protection, making it one of the only 3 in 1

insulation systems available. The Envir<e>FlexSystem has also been designed for ease of use makingit one of the fastest and easiest thermal systems toinstall available.The product is made to size so minimumcutting is required on-site. Unlike manystandard insulation types there is no itchymaterials and can be installed in a standardloft within a day. The system can be applied tonew and existing floors/flat roofs and betweenrafters in loft conversions, offering 1 hour fireprotection and excellent acoustic protection.

Only one 9mm sheet of standard plasterboard isrequired for ceilings to achieve a 1 hour fireprotection rating.

Insulation System

ENVIROGRAF

Intumescent Systems Ltd, Envirograf House, Barfrestone, Dover, Kent, CT15 7JG, UK

Tel: +44 (0) 1 304 842 555 – Fax: +44 (0) 1 304 842 666 – Email: sales@envirograf.com – URL: www.envirograf.com

CI/SFB (68.5) 529F

Advantages

Easy to installNon-itch productAllows free air movementMeets condensation requirementsOffers 1 hour fire protectionMaintenance freeMoisture resistantSupplied to rafter/floor joist widths- resulting in minimal cutting on siteSaves costs of labour and time!Only a 9mm plasterboard ceilingrequired for 1 hour fire protectionFast to installSound studio levels of acousticprotectionWhen used to insulate floors in loftareas the ceiling below requires nofire rating upgrade!

The Envir<e>Flex System reflectsexternal heat using its unique reflectivesilver foil board, keeping the roof livingspace cool in summer conditions.

Whilst reflecting heat from externalsources, the Envir<e>Flex Systemoffers a high level of thermalprotection providing an effectiveinsulation solution, contributing to thebuilding’s overall U-Value calculations.

®

U Value0.20W/m2Kfor pitchedroof areas

U Value0.20W/m²K

for floor/flat roofs

A unique 3-in-1 insulationsystem offering:

1 hour fire protection,acoustic protection, and

thermal protection

Standards and Approvals

Building Regulations

ThermalDocument L1A and L1B of the Building Regulationsrequires that the ideal Elemental U-value target forroof living areas should be 0.20 (0.18 Scotland), forpitched roof constructions and 0.25 (0.18 Scotland -0.22 Ireland) for flat roofs.

The process of calculating these final U values isflexible, allowing for trade off with other key insulatingbuilding elements. These calculations are usuallymade by thermal building experts during the designstage of a new build or extended development.

Both Documents L1A and L1B offer recommendedtolerances for individual elements U Values shown inthe Table below:

Thermal performanceEnvir<e>Flex System has been tested at the BDAKEUR Test House in Holland.

The tests included the Envir<e>Flex System in both apitched and flat roof structure. The results are shownin the table below for U Value calculation purposes.

The Envir<e>Flex System fully satisfies therequirements of Documents L1A and L1B. TheEnvir<e>Flex systems can offer effective thermalinsulation solutions that are required by BuildingControl where the tolerances are acceptable on anappropriate building project.

FireDocument B of the Building Regulations states:B2. (1) To inhibit the spread of flame within thebuilding, the internal linings shall:

(a) adequately resist the spread of flame over theirsurfaces; and

(b) have, if ignited, a rate of heat release or a rate offire growth, which is reasonable in thecircumstances.

(2) In this paragraph ‘internal linings’ mean thematerials or products used in lining any partition,wall, ceiling or other internal structure.

Fire performanceThe Envir<e>Flex System comprises a fire resistantinsulation sponge and a fire barrier, tested to BS476:Part 21:1987 offering 1 hour fire resistance.

CondensationDocument C of the Building Regulations requiresstandards of the control of condensation. When usedwith a impermeable underlay the Envir<e>Flex Systemsatisfies the requirements of Document C.

AcousticThe acoustic value is dependent upon the overallstructural design and included elements. The foamelement of the Envir<e>Flex System has been testedin variable constructions and is commonly used forhigh level sound suppression systems in sound studioenvironments.

The Envir<e>FlexSystem allows full

ventilation between theinsulation element and

the outer roofmembrane minimising

condensation risk.

The Envir<e>FlexSystem offersThermal,Acoustic and 1 hourFire Protection -offering a very effectivetriple protection(Thermal, Acoustic andFire) system.

Insulation Thickness Air Cavity Plasterboard Thermal U ValueConductivity

Floors75mm 25mm 12mm 0.0534 0.41100mm 50mm 12mm 0.0573 0.27

Flat roof structures75mm 25mm 12mm 0.0534 0.41100mm 50mm 12mm 0.0573 0.27

Pitched roof structures75mm (20mm TBL)* 25mm 9mm 0.0397 0.31550mm (40mm TBL)* 50mm 9mm 0.0397 0.315

Design details

The Envir<e>Flex system comprises a non-inflammablefoam attached to a thin foiled, heat-reflective boardwith a fire-resistant barrier attached.The product is fixedusing Envirograf® IA adhesive. For floors and ceilings,standard staples are also applied using a normalindustrial staple gun.

The system designed for pitched roof areas includes athermal bridge insulation layer attached to the reflectiveboard.

Limiting U-value standards (W/m2K)Element Area-weighted b. Limiting U-value

average U-value

07.053.0llaW

07.052.0roolF

53.052.0fooR

(please seeTable1 L1B and Table2 L1A)

*TBL - Thermal Barrier Layer

This product can assist in thecompliance with Document Eof UK Building Regulations and,when used in conjunction withplasterboard or T&G boards andsubject to the surroundingenvironmental variables, canassist in the attainment of atarget U-value of 0.20 W/m²K.

Pitched Roof areas

Envir<e>Flex System can also be used in both roofsections and floors - typical in new build designs, orloft extensions offering thermal, acoustic and fireprotection.

Envir<e>Flex System requires no fixingof battens (shown adjacent) to therafters preventing conventionalinsulation boards from moving flushagainst the roof membrane creatingserious condensation issues.

Application to Pitched Roof - LoftConversions and New Builds

The Envir<e>Flex System for pitched roofapplications has been designed especially forloft spaces that are to be used as living areas.This system includes a unique 20mm or40mm insulation barrier, covering exposedrafters, removing thermal bridging problems.

Air gap: 25mm 50mm

Insulation: 75mm 50mm

Thermal barrier: 20mm 40mm Envir<e>Flexfixed between rafters

A 20mm or 40mm thermal bridgeinsulation barrier is included in theEnvir<e>Flex System designed forpitched roofs.

U Value0.27W/m²K

The Envir<e>Flex System is simple and fast toinstall. Supplied to the correct rafter widths,measuring and cutting usual to manyconventional systems of insulation is notrequired. The system allows for a simple pushand glue fit into the gap between rafters andcannot be accidentally pushed flush against thefelt. Therfore, no stop battens, often fitted withstandard insulation boards are unnecessary.

Code: EFS/75/20 EFS/50/40

The Envir<e>Flex System can be used inceiling/floor structures, offering thermalinsulation, acoustic and 1 hour fire protection.The system allows for a cleararea for pipes and cables reducing electricaloverheating of wires as well as excellentmaintenance access, as stated in BRE 262.

Installation from below is ideal in new buildprojects.

Fitting from above is typical in a loftextension/refurbishment project.

Application to ceiling/floor areasSupplied to joist gap size, offering1 hour fire protection and meeting acousticrequirements the Envir<e>Flex Systemoffers a total solution for ceiling floorthermal, acoustic and fire protectionrequirements. Once installed only a9mm plasterboard is required for ceilingfinishing.

Application to Flat Roof SystemsOne of the simplest methods of insulatinga flat roof section is to install the insulationfrom below, between the roof joists.Envir<e>Flex System is again supplied tojoist gap measurements allowing fast andefficient application. The System alsooffers 1 hour fire protection allowingminimum thickness of 9mm plasterboardfor ceiling finishing.

Only 1 sheetof 9mm

plasterboard isrequired!

Floor/ceiling areas

Flat roofs

50mm

100mm

50mm

100mm

Envir<e>Flexfixed between joists

Envir<e>Flexfixed between joists

Envir<e>Flexfixed between joists

Fitting Envir<e>Flex from below the floor/cei ling structure

Fitting Envir<e>Flex from above the floor/ce iling structure

U Value0.27W/m²K

U Value0.27W/m²K

WHEN USED IN FLOORS DURING A LOFT CONVERSION PROJECT THERE IS NO NEEDTOUPGRADE THE CEILING BELOW.THE ENVIR<E>FLEX SYSTEM OFFERS OVER 1 HOUR FIREPROTECTION - MEETING DOCUMEN T B OFTHE BUILDING REGULATIONS FOR LOFT CONVERSIONS.

Fixing pitched roof spaces

MeasurementsMeasure the distance between the rafters/joistsand quote when ordering. Rafter/joistthicknesses also need to be supplied.TheSystem is made to order - supplied forimmediate and fast application. See orderinginstructions for more details.

1

FixingOffer The Envir<e>FlexSystem between therafter/joistsandpus h into place. The system isdesigned to connect with an overlap on the rightedge, see above. It is advisableto begin fixingfrom the right side of each areaworking to the left.Use adhesive supplied to fix the flange sectionagainst the rafter/joist, pressing firmly against thewooden substrate ensuring a flat and smooth fix.

3

Cutting lengths to fitWhen using lengths to finish a section, simplycut to size using a standard Stanley Knife

5

Overlap lock fittingThe section legnths aredesigned to lock togetherwith the overlap edgebutting against the flatedge of the previouslyfixed panel

4

Fitting against purlinsWhen fixing between purlin/beams bend the30mm overlap edge back to fix against thebeam, glue and staple to finish.

6GlueUsing Envirograf® IA adhesive, glue the flangesides of the System.

2

Fixing floor/ceilings

Fixing flat roofs

New build floorsSimply fix the system between the floor joistsfrom below. For one hour fire protection theceiling will only require 9mm plasterboard tofinish

Loft extension floorsFix the system from above and finish with floorboards.

Flat roof sectionsThe Envir<e>Flex System isideal for use in flat roof areas.Fix from below between theroof joists before fixing theceiling plasterboard.

Regional Office

Supplied in 1170mm lengths. Envirograf ® IA adhesiveis calculated on overall area required.

For floor/ceiling applications simply overlap thethin barrier sections against the joists. Fixing isachieved using the Envirograf ® IA adhesive and astandard staple gun.

AB

When ordering it is important to forward the widthbetween rafters or joists (A). For older buildings thismay vary,please supply the measurements of thelargest gap. The width of the rafter or joist (B) is alsorequired.

Ordering

References

50/F75/F

100/F

50/FR2050/FR40

75/FR2075/FR40

100/FR20100/FR40

Thickness (mm)

For floors, ceilings, and flat roofs:50mm75mm

100mm

Can be supplied up to 200mm thickness(please specify which when ordering)

For pitched roofs:50mm with 20mm thermal bridge barrier50mm with 40mm thermal bridge barrier

75mm with 20mm thermal bridge barrier75mm with 40mm thermal bridge barrier

100mm with 20mm thermal bridge barrier100mm with 40mm thermal bridge barrierSupplied in standard widths of 300mm, 400mm, 450mm,500mm, and 550mm (please specify which when ordering)

THE EASIEST & CLEANEST LOFT & TRUSS INSTALLATION, GIVING U-VALUE TO APPROVED DOCUMENT L1B & L2B, SOUND INSULATION TO DOCUMENT E - IMPACT & AIRBORNE SOUND

AND FIRE PROTECTION FOR 80 MINUTES INTEGRITY & INSULATION.

FOR TRUSS APPLICATIONS; • Apply the adhesive to both sides and the 30 mm overlap, as shown in Pictures 1 & 2. • Staple to the trusses, as shown in Pictures 3 & 4. • Picture 5 shows the air and moisture gap between the felt and the barrier. • Picture 6 shows the Envir<e>Flex® fitted between the floor joists in the lofts. • Picture 7 shows the finished floor with chip boarding on top. For loft conversions, Envir<e>Flex® is a must. No loss in the roof space and only one sheet of 9 mm plasterboard is required.

PASSIVE FIRE PREVENTION PRODUCTS

1 - ADHESIVE APPLICATION 2 - PUSH UP INTO THE TRUSSES 3 - STAPLE TO THE TRUSSES

4 - STAPLE TO THE TRUSSES 5 - PUSH UP INTO THE TOP OF TRUSSES 5

6 - STAPLE TO THE TOP OF THE TRUSSES 6 7

INTUMESCENT SYSTEMS LTD Envirograf House, Barfrestone, Dover, Kent, CT15 7JG

Phone: 01304 842555 Fax: 01304 842666

TESTS FULLY CONFIRM THAT THE ENVIR<E>FLEX SYSTEM, WHEN FITTED IN ACCORDANCE TO THE MANUFACTURER’S INSTRUCTIONS, SATISFIES THE BUIILDING REGULATION; APPROVED DOCUMENT E