T-Barrier System - ARC Building Solutions · T-Barrier® System Masonry Applications Satisfying Fire, Thermal and Acoustic Requirements at the Combined Party Wall and Pitched Roof

®

T-Barrier®

System

M a s o n r yA p p l i c a t i o n s

Satisfying Fire, Thermal and Acoustic Requirements at the Combined Party Wall and Pitched Roof Junction

Edge Seal EffectivenessThe effectiveness of ARC T-Barrier as an edge seal has been independently tested by Leeds Beckett University. The test replicated real life conditions by measuring the differentials between pressurised and non-pressurised cavities.

This ground-breaking test is the only effective test available currently to measure a products’ effectiveness as an edge seal.

ARC T-Barrier was found to provide three times the pressure differential compared to a conventional cavity barrier system, and nearly twice the pressure differential of the Airtightness Membrane employed by some house builders.

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PartyWall DPC

Airtightness Membrane

ARCT-Barrier®

The Problem: Thermal BypassWithout effective edge sealing, the party wall cavity allows heat to escape. The image (right) highlights the areas of heat loss in a row of terraced houses. Of particular note is the heat loss at the top of the junction where the party wall cavity meets the external cavity.

The SolutionThe ARC T-Barrier System dramatically reduces heat loss along the edges of the party wall, enabling a zero U-value to be achieved (see below table).

Party Wall Construction U-value (W W/m2K)

Solid 0.0

Unfilled cavity with no effective edge sealing 0.5

Unfilled cavity with ARC T-Barrier System around all exposed edges and inline with insulation layers in abutting elements

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A fully filled cavity with ARC T-Barrier System at all exposed edges and inline with insulation layers in abutting elements

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Zero U-value at party wall can be achieved

Simplified installation when compared to conventional systems

Reduces sound transmission between the dwellings and within the cavity

Minimises thermal bypass

Available to suit both masonry and timber frame applications

Up to three times more effective as an edge seal than conventional systems

Key Benefits of ARC T-Barrier System

Satisfies NHBC Chapter 7.2 D13 ‘Junctions between roofs and compartment or separating walls shall adequately resist fire spread’.

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Results presented were obtained using a 100mm party wall cavity with a 100mm external cavity.

Tile Batten Barrier

T-Barrier Pitched Roof

T-Barrier Vertical

Soffit Barrier

What is ARC T-Barrier System?The ARC T-Barrier System has been developed to create an effective edge seal around the party wall cavity and to provide a complete fire barrier between two dwellings, both in the vertical cavity and the cavity between the pitched roofs.

By creating an effective edge seal around the party wall cavity, the ARC T-Barrier System helps to achieve a zero U-value at the party wall. The system also provides a simple solution for complying with NHBC Chapter 7.2 D13 ‘Junctions between roofs and compartment or separating walls shall adequately resist fire spread’.

Introducing the Traffic Light SystemThe ARC T-Barrier System is fitted as the build progresses, from ground level right up to the top of the roof pitch. ARC’s unique Traffic Light System enables the correct product for the current stage of the build to be identified at-a-glance.

Installed vertically at the party wall junction

The ARC T-Barrier is designed to provide a fire, thermal and acoustic break at the junction between the external cavity and the party wall cavity. This minimises the effect of thermal bypass as well as reducing flanking noise in the cavity. The ARC T-Barrier provides up to 4 hours fire integrity in masonry construction, and meets the Robust Detail’s requirement for a barrier where a separating party wall meets an external cavity wall, significantly reducing sound transmission along the cavity.

The ARC T-Barrier Vertical Masonry is designed to be fitted vertically with a friction fit within the external cavity and a compression fit within the party wall as the brick and blockwork progresses. Care should be taken to ensure butt joints are compressed together as much as possible to ensure a tight fit without any gaps.

ARC T-Barrier Vertical Masonry

Key FactsMaterial Rockfibre mineral wool

Thermal Conductivity 0.037W/mK

Sleeve Material Polythene

DPC Fitted Yes

Standard Length 1.2m

Fire Rating (Masonry) Up to 4 hours

Installed up the roof pitch above the party wall blockwork

The ARC T-Barrier Pitched Roof is designed to provide a fire, thermal and acoustic barrier between the top of the party wall blockwork and the underslaters felt. The product is fitted along the length of the roof pitch, from soffit to apex ensuring an effective and consistent barrier.

The ARC T-Barrier Pitched Roof is easily installed once the party wall blockwork is complete, with the unique T-shape being held in place by compression between the two leaves of party wall blockwork.

NHBC Chapter 7.2 S13 states that a separating wall should stop 25mm below the top of the adjacent roof trusses. ARC T-Barrier Pitched Roof is designed to compress within this gap, satisfying the NHBC recommendation for a mineral wool fire barrier.

ARC T-Barrier Pitched Roof



Sleeve Material Polythene

DPC Fitted No



Fit: As brick and block work progresses

Fit: After party wall blockwork is complete, before roof membrane

Installed above the roof membrane between the tile battens

The ARC Tile Batten Barrier is designed to provide a fire, thermal and acoustic break at the party wall between the roof tiles and roof membrane, working in conjunction with ARC T-Barrier Pitched Roof to create a complete fire break at the separating wall.

The ARC Tile Batten Barrier is supplied in 1.2m lengths allowing easy on-site handling and making for quick installation. The tile battens are nailed on top of the barrier, compressing it where the two cross. A knife is used to score

the ARC Tile Batten Barrier, releasing the compression and allowing the barrier to recover to the full depth of the tile batten.

ARC Tile Batten Barrier



Material Thickness 30mm

Material Width 300mm


Installed within the soffit and within any void above the external brickwork

The ARC Soffit Barrier is designed to fill the void within the soffit, providing a fire, thermal and acoustic barrier between dwellings. The barrier is manufactured from rockfibre mineral wool, with a foil facing to ensure an effective smoke barrier is created. An exact fit can be created to form an effective barrier at this junction.

ARC Soffit Slab



Foil Facing Yes

Standard Dimensions 450mm x 600mm

Standard Thickness 100mm

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Fit: As tile battens are fitted

Fit: During soffit installation

Technical SpecificationsThe following technical specifications are common between all four barriers within the ARC T-Barrier System.

Fire PropertiesThe ARC T-Barrier System is manufactured using rockfibre mineral wool which achieves a fire classification of Euroclass A1 as defined in BS EN 13501-1.

Thermal PropertiesARC’s rockfibre mineral wool insulation has a thermal conductivity of 0.037W/mK.

StandardsThe rockfibre mineral wool used in the manufacture of ARC T-Barrier System conforms to BS EN 13162 and EN16001 Energy Management Systems. The DPC is manufactured in accordance with BS 6515.

Storage and PackagingARC Fire Barriers are supplied in polythene packs which are designed for transporting and protecting the products. It is not recommended that the packs are stored in direct sunlight as the polythene which encapsulates the barriers can be damaged. When storing the barriers for longer periods of time it is recommended the product should be stored indoors, or under cover.

EnvironmentARC’s rockfibre mineral wool has no CFCs or HCFCs involved in the manufacturing process and represents no known threat to the environment, and is classed as zero ODP and zero GWP. ARC T-Barrier System has a Green Guide rating of A+.

Health and SafetyARC Building Solutions has an approved Health and Safety Policy and is committed to working and supplying products safely. ARC’s rockfibre mineral wool is not classed as a possible human carcinogen. We have assessed products as required by Substances Hazardous to Health Regulations (COSHH). An ARC COSHH data sheet is available and can be downloaded from ARC’s website.


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1 ARC T-Barrier Vertical Masonry

ARC Traffic Light System: Specification & Installation Guide

2 ARC T-Barrier Pitched Roof

3 ARC Tile Batten Barrier

4 ARC Soffit Slab

Product Code

Party Wall Cavity

Ex-ternal Cavity

Dimensions Fire Rat-ing

TBM75/100 75mm 100mm 85/100 x 100/250 x 1200mm 4 hrs

TBM75/120 75mm 120mm 85/100 x 120/250 x 1200mm 4 hrs

TBM75/125 75mm 125mm 85/100 x 125/250 x 1200mm 4 hrs

TBM75/150 75mm 150mm 85/100 x 150/250 x 1200mm 4 hrs

TBM100/100 100mm 100mm 110/100 x 100/250 x 1200mm 4 hrs

TBM100/120 100mm 120mm 110/100 x 120/250 x 1200mm 4 hrs

TBM100/125 100mm 125mm 110/100 x 125/250 x 1200mm 4 hrs

TBM100/150 100mm 150mm 110/100 x 150/250 x 1200mm 4 hrs

Fitted vertically at party wall junction• Fitted as brick and block work progresses• Friction fit within external cavity• Compression fit within party wall cavity•

Product Code

Party Wall Cavity

Void Thickness

Dimensions

TBR75/25 75mm 25mm 90/75 x 50/300 x 1200mm

TBR100/25 100mm 25mm 120/100 x 50/300 x 1200mm

TBR125/25 125mm 25mm 135/120 x 50/300 x 1200mm

TBR150/25 150mm 25mm 160/120 x 50/300 x 1200mm

Fitted across the pitch of the roof between • the top of the party wall and the roof membraneFitted after blockwork is completed and • before the roof membrane is installedFriction fit within void between blockwork • and membraneCompression fit within party wall cavity•

Product Code Dimensions

TBB30 30 x 300mm x 1.2m

Fitted across the pitch of the roof between • the roof membrane and underside of roof tilesFitted as the tile battens are fitted• Tile batten is nailed on top of the ARC Tile • Batten Barrier. The compressed barrier is then scored to allow it to recover to the full depth of the tile batten

Product Code Dimensions

SSL600/450 450 x 600 x 100mm

Fitted within the soffit fully closing any • voidFitted during soffit installation• Supplied in standard soffit width, simply • cut roof angle to ensure correct fit

Why ARC?ARC Building Solutions are an independent manufacturer and distributor of specialist insulation products for the construction industry. Established in 2008, ARC specialises in cavity fire barriers and cavity closers.

ARC is dedicated to providing excellent and impartial advice and support, both in terms of service and technical solutions. Our technical experts are on hand to identify the best solution for your requirements, while our production team are able to respond quickly ensuring even the most bespoke products can be delivered to site on time.

ARC have recently achieved ISO9001 and ISO14001 accreditation, assessed by BRE Global Ltd. ARC also holds third party accreditation from LABC and all fire barriers and cavity closers are manufactured to NHBC requirements.

MANAGEMENTSYSTEMS

Assessed to ISO 9001 & ISO 14001BRE Certificate No. 1227

Don’t take our word for it, see our

accreditation...

Whatever your enquiry, our friendly team are here to help.

Get in touch

t 0113 252 9428 f 0113 253 5642w www.arcbuildingsolutions.co.uke [email protected] Building Solutions Unit H1/H2, Gildersome Spur, Leeds, LS27 7JZ

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T-Barrier System - ARC Building Solutions · T-Barrier® System Masonry Applications Satisfying Fire, Thermal and Acoustic Requirements at the Combined Party Wall and Pitched Roof