Isover Solutions Guide - Specifying Cavity Barriers · ‘Cavity barriers should be used to sub-divide any cavity, including any roof space, so that the distance between cavity barriers

Isover Solutions GuideSpecifying Cavity Barriers

2 www.isover.co.uk Isover Technical Advice – Tel: 0115 945 1143

ContentsIntroduction to Isover 2

Why Isover ULTIMATE™ Cavity Barriers? 3

What is ULTIMATE™ technology? 4

Fire regulations 5

Acoustic regulations 6

Thermal regulations 7

Isover solutions 9

Isover products 16

IntroductiontoIsoverAtIsoverwefocusonyourbuildingenvironment.Whetherit’saschool,hospital,warehouse,factory,officeorhome,wehavetheinsulationsolutionstoensurethatyourenvironmentisthermallyprotected,hasminimalnoisedisruptionandissafe.

Thisiswheremineralwooloffersbenefitsthatothermaterialssimplycannotachieve–andwhereIsoverexcels.Ourproductsaredesignedtodeliveryouthebestpossiblevaluecombinationforyourenvironment:

4 highthermalperformance

4 excellentacousticperformance

4 firesafety

4 goodindoorairquality

Isoverleadsthewayintermsofperformancecriteriaineachofthesecriticalareas.Mineralwoolisthebestvalueinsulationmaterialandourproductsare“bestforbuildings”.

3Isover Technical Advice: [email protected] www.isover.co.uk


Isover ULTIMATE™ Cavity Barriers are multi-purpose insulation products providing fire, acoustic and thermal performance in concealed wall cavities. Isover ULTIMATE™ Cavity Barriers conform to building regulation definitions of a cavity barrier, cavity stop, flexible closer and effective edge sealing.

WhyIsoverULTIMATE™CavityBarriers?Contents

"Protect your most precious resources and provide a safer

building environment"

“Protect your most precious resources and provide a safer building environment.”

Isover ULTIMATE™ Cavity Barriers provide up to 120 minutes fire protection in concealed cavities to help meet requirements of Approved Document B Fire Building Regulations (England & Wales) and Section 2 (Scotland).

“Minimise noise disruption and provide a peaceful environment.”

Isover ULTIMATE™ Cavity Barriers minimise flanking sound transmission along the wall cavity to help meet requirements of Approved Document E Acoustic Building Regulations (England & Wales) and Section 5 (Scotland).

“Thermal solutions to meet and exceed even the most demanding of requirements.”

Isover ULTIMATE™ Cavity Barriers reduce the thermal bypass effect by providing edge-sealing to the separating cavity wall at external wall and roof junctions.


WhatisULTIMATE™Technology

Durable and lightweight, Isover

ULTIMATE™ Cavity Barriers are flexible

for ease of fitting and offer the

compressive qualities and integrity

demanded to provide a permanent,

stable and effective barrier within

the cavity. They not only prevent the

passage of fire and smoke but have

much higher sound absorption than

traditional products to reduce flanking

sound transmission, improving both

safety and comfort for building users.

Isover ULTIMATE™ Cavity Barriers incorporate groundbreaking new mineral wool insulation that helps take fire safety in buildings to a new level. Developed by insulation world leader Isover, ULTIMATE™ uses breakthrough technology that combines the handling and performance benefits of glass wool with the outstanding fire resistance of stone wool. ULTIMATE™ Cavity Barriers are lighter and easier to fit, whilst offering the demanding fire performance standards required for concealed cavities in all types and heights of building.



FireRegulationsApproved Document B - Fire Safety (England and Wales)

The latest changes to fire regulations in the UK came into effect on 6th April 2007 and have now been split into two volumes:

• Approved Document B – Volume 1 Dwellinghouses

• Approved Document B – Volume 2 Buildings Other Than Dwellinghouses

Concealed spaces (cavities)The areas relating to concealed cavities in these volumes are in Section 6 of Volume 1 and Section 9 of Volume 2. Paragraph 6.1 of Volume 1 states ‘concealed spaces or cavities in the construction of a building provide a ready route for smoke and flame spread e.g. in walls, floors, ceilings and roofs. As any spread is concealed, it presents a greater danger than would a more obvious weakness in the fabric of the building.’

Provision for cavity barriersApproved Document B provides a number of provisions to help prevent the spread of smoke and flames in concealed cavities. Both documents state ‘the provisions necessary to restrict the spread of smoke and flames through cavities are broadly for the purpose of sub-dividing cavities, which could otherwise form a pathway around a fire separating element, and closing the edges of cavities; therefore reducing the potential for unseen fire spread.

Volume 2 also highlights the importance of subdividing extensive cavities in buildings other than Dwellinghouses. ‘Cavity barriers should be used to sub-divide any cavity, including any roof space, so that the distance between cavity barriers does not exceed the dimensions given in Table 13 (page 82).’

Performance requirementsTable A1 in Approved Document B states the minimum fire performance of cavity barriers is 30 minutes fire integrity and 15 minutes fire insulation.

However, cavity barriers installed in line with compartment walls or floors should maintain the fire performance of the compartment.

Section 2 (Scotland)

Annex 2.A of Section 2 states the minimum fire performance of cavity barriers in horizontal and vertical applications is 30 minutes fire integrity and no minimum requirement for fire insulation.

As with the guidance given in Approved Document B, cavity barriers installed in line with compartment walls or floors should maintain the fire performance of the compartment.


AcousticRegulationsApproved Document E - Fire Safety (England and Wales)

Section 2 – Separating Walls and Associated Flanking Constructions for New BuildingsSection 2 of Approved Document E states ‘in order for the construction to be fully effective, care should be taken to correctly detail the junctions between the separating wall and other elements, such as floors, roofs, external walls and internal walls’.

Approved Document E makes recommendations to reduce flanking sound transmission by using cavity stops or flexible closers in the following details:

• External and separating cavity wall junctions

• Ceiling and roof junctions

• External cavity walls at eaves level

Isover ULTIMATE™ Cavity Barriers meet the generic description for cavity stops or flexible closers. Isover solutions to each of the three details above can be found in the solutions section on pages 10, 11 and 12.

Section 3 – Separating Floors and Associated Flanking Constructions for New BuildingsSection 3 of Approved Document E states ‘in order for the construction to be fully effective, care should be taken to correctly detail the junctions between the separating floors and other elements, such as external walls, separating walls and floor penetrations.’

Approved Document E makes recommendations to reduce flanking sound transmission by using cavity stops or flexible closers in external wall and separating floor junctions:

Isover ULTIMATE™ Cavity Barriers meet the generic description for cavity stops or flexible closers. Isover solutions to the detail above ULTIMATE™ can be found in the solutions section on page 14.


The importance of flanking sound transmission is highlighted with in Paragraph 5.0.8 of Section 5. It states: ‘If the flanking construction and its connections with the separating structure are not correctly detailed, flanking transmission can equal, or even exceed, sound levels perceived as a result of direct transmission’.

Recommended detailing can be found within the document ‘Example Constructions and Generic Internal Constructions’ located on the Building Standards page on the Scottish government website.



ThermalRegulationsApproved Document L1A 2013 - Thermal requirements

Approved Document L will no longer treat separating cavity walls as a zero heat loss element, due to a phenomenon known as the 'thermal bypass' or 'party wall bypass' effect.

The heat loss can be reduced by measures that restrict air movement through the cavity, either by means of fully filling the cavity and/or by providing effective sealing around the perimeter.

Table3-U-valuesforpartywalls PartywallconstructionU-value(W/m2K) U-value(W/m2K)

Solid 0.0 Unfilled cavity with no effective edge sealing 0.5

Unfilled cavity with effective edge sealing around all exposed edges and in line with insulation 0.2 layers in abutting elements

A fully filled cavity with effective sealing at all exposed edges and in line with insulation layers 0.0 in abutting elements


Scottish regulations also recognise that separating walls should no longer be treated as zero heat loss. Section 6 stipulates the following:

To limit heat loss, a separating wall cavity should have effective perimeter sealing around all exposed edges and in line with insulation layers in abutting elements which separate the dwelling from another building or from an unheated space. Further reduction in heat loss can be achieved where the cavity separating wall is also fully-filled with a material that limits air movement.


ThermalRegulationsIsover ULTMATE™ Cavity Barriers

As highlighted in Approved Document L1A, Table 3, a zero U-value separating wall can be achieved by attaining the following two elements:

4 Filling of the cavity

4 Effective edge sealing

The purpose of effective edge sealing is to eliminate the possibility of air movement from the separating cavity to the external environment, or vice versa. Effective edge sealing is required at the external / separating wall junction and the separating wall and roof junction. These details are highlighted in more detail on pages 10 and 11.

By fully-filling the external cavity with Isover insulation and tightly butting the insulation at the separating wall junction, additional edge sealing will not be required at the external / separating wall junction. However, an Isover ULTIMATE™ Cavity Barrier will be required to achieve effective edge sealing if the external wall is partially-filled with a rigid foam board.

Ground Floor Ground Floor

1st Floor 1st Floor

Loft Space

Roof

Loft Insulation Loft Insulation

Loft Space

Roof

Ground Floor Ground Floor

1st Floor 1st Floor

Loft Space

Roof

Loft Insulation Loft Insulation

Loft Space

RoofThe information detailed above is guidance only and it is up to the designer / specifier to ensure that they speak with the building control officer / NHBC officer to determine the acceptability of this statement.



Separating / external wall junctions

Eaves level

Separating floor junctions

Internal / external wall junctions

Window and door reveals

Page11Page10

Page13Page12

Page14 Page15

Separating wall / roof junctions

Isoversolutions1 2

3

5 6

4


Suitable for:

4 Masonry

4 Timber

4 Steel

Regulation Detail compliance

Fire Regulations (Approved Document B and Section 2) 4

Acoustic Regulations (Approved Document E and Section 5) 4

Thermal Regulations (Approved Document L and Section 6) 4

1Externalandseparatingcavitywalljunction

Isover product Fire performance (mins)

Isover ULTIMATE™ Cavity Barrier - Party Wall(300mm wide x 1200mm long)

120

Isover ULTIMATE™ Cavity Barrier - Storey Height(300mm wide x 2400mm long)

120



Suitable for:

4 Masonry

4 Timber

4 Steel




Thermal Regulations (Approved Document L and Section 6) 4

2Separatingcavitywallandroofjunction



120


120


Suitable for:

4 Masonry

4 Timber

4 Steel




Thermal Regulations (Approved Document L and Section 6)

3Externalcavitywallsateaveslevel


Isover ULTIMATE™ Cavity Barrier - 30 minute(100mm wide x 1200mm long)

30


60


120


120



Suitable for:

4 Masonry

4 Timber

4 Steel



Acoustic Regulations (Approved Document E and Section 5)


4Externalcavitywallandcompartmentwalljunction



30


60

Isover ULTIMATE™ Cavity Barrier - Party Wall (300mm wide x 1200mm long)

120

Isover ULTIMATE™ Cavity Barrier - Storey Height (300mm wide x 2400mm long)

120


Suitable for:

Suitable for:

4 Masonry

4 Timber

4 Steel







30


60


120


120

5Externalcavitywallandseparatingfloorjunction



Suitable for:

4 Masonry

4 Timber

4 Steel



Acoustic Regulations (Approved Document E and Section 5)


6Windowanddoorreveals



30


60


120

Isover ULTIMATE™ Cavity Barrier - Storey Height (300mm wide x 2400mm long)

120

Suitable for:


Isover ULTIMATE™ Cavity Barrier - 30 minuteAn ULTIMATE™ mineral wool cavity barrier providing a solution to acoustic flanking and standard fire performance in masonry, timber frame and steel cavities.

Fire performance: 30 minutes integrity, 15 minutes insulation

Typical applications: Standard fire protection in the following details

3 External cavity walls at eaves level3 External cavity wall and compartment wall junction3 External cavity wall and separating floor junction3 Window and door reveals

Product Cavity size (mm)

Width (mm)

Length (mm)

Sleeve colour

Isover ULTIMATE™ Cavity Barrier - 30 minute 50 - 65 100 1200 Yellow

Isover ULTIMATE™ Cavity Barrier - 30 minute 66 - 80 100 1200 Blue

Isover ULTIMATE™ Cavity Barrier - 30 minute 81 - 100 100 1200 White

Product-30minutebarrier

Fire performance30 minute fire performance. Provides 30 minutes fire protection in concealed cavities to help meet the requirements of Part B Fire Building Regulations (England and Wales) and Section 2 (Scotland).

Acoustic insulationHelps to meet the requirements of Approved Document E Acoustic Building Regulations 2003 (England and Wales) and Section 5 (Scotland) by minimising flanking sound transmission along the wall cavity.

Easy to install• Excellent compression properties, which

allows for the barrier to be easily installed into cavities without risking damage to brickwork.

• Colour coded packaging prevents installation of the incorrect barrier sizes on-site.

Euroclass A1 fire ratingTotally non-combustible and fire safe.

Protected planetEnvironmental credentials:

• Zero Ozone Depletion Potential (ODP). • Global Warming Potential (GWP) of less

than 5.



Isover ULTIMATE™ Cavity Barrier - 60 minuteAn ULTIMATE™ mineral wool cavity barrier providing a solution to acoustic flanking and high fire performance in masonry, timber frame and steel cavities.


Typical applications: High fire protection in the following details

3 External cavity walls at eaves level3 External cavity wall and compartment wall junction3 External cavity wall and separating floor junction3 Window and door reveals


Width (mm)

Length (mm)

Sleeve colour

Isover ULTIMATE™ Cavity Barrier - 60 minute 50 - 65 200 1200 Yellow

Isover ULTIMATE™ Cavity Barrier - 60 minute 66 - 80 200 1200 Blue

Isover ULTIMATE™ Cavity Barrier - 60 minute 81 - 100 200 1200 White

Product-60minutebarrier









than 5.


Awaiting image

Isover ULTIMATE™ Cavity Barrier - Party WallAn ULTIMATE™ mineral wool cavity barrier providing a solution to acoustic flanking, excellent fire performance in masonry, timber frame and steel cavities.


Typical applications: Excellent fire protection in the following details

3 External and separating cavity wall junction3 External cavity walls at eaves level3 Separating cavity wall and roof junction3 External cavity wall and compartment wall

junction3 External cavity wall and separating floor junction3 Window and door reveals


Width (mm)

Length (mm)

Sleeve colour

Isover ULTIMATE™ Cavity Barrier - Party Wall 50 - 65 300 1200 Yellow

Isover ULTIMATE™ Cavity Barrier - Party Wall 66 - 80 300 1200 Blue

Isover ULTIMATE™ Cavity Barrier - Party Wall 81 - 100 300 1200 White

Product-partywallbarrier



Thermal InsulationProvides effective edge sealing at separating wall junctions to help towards a zero U-value separating wall as defined in Approved Document L1A 2010 (England & Wales) and Section 6 (Scotland).







than 5.

Th

ermal insulation



Isover ULTIMATE™ Cavity Barrier - Storey HeightAn ULTIMATE™ mineral wool cavity barrier providing a solution to acoustic flanking, excellent fire performance in masonry, timber frame and steel cavities.


Typical applications: Excellent fire protection in the following details

3 External and separating cavity wall junction3 External cavity walls at eaves level3 Separating cavity wall and roof junction3 External cavity wall and compartment wall junction3 External cavity wall and separating floor junction


Width (mm)

Length (mm)

Sleeve colour

Isover ULTIMATE™ Cavity Barrier - Storey Height 50 - 65 300 2400 Yellow

Isover ULTIMATE™ Cavity Barrier - Storey Height 66 - 80 300 2400 Blue

Isover ULTIMATE™ Cavity Barrier - Storey Height 81 - 100 300 2400 White

Product-storeyheightbarrier



Thermal InsulationProvides effective edge sealing at separating wall junctions to help towards a zero U-value separating wall as defined in Approved Document L1A 2010 (England & Wales) and Section 6 (Scotland).

Storey Height (2.4m) productFewer butt joints means less chance of installer error, improving in-situ performance and reducing installation times.







than 5.

Th

ermal insulation

www.3pointplan.co.uk www.isover.co.uk

Published Date: October 2014

Isover Document Reference: I-CB-SG-1403

Isover Order Placement or Order Enquiries: Tel: 0800 032 2555 Fax: 0800 917 9188

Isover Technical Advice - Buildings Insulation: Technical Enquiries Tel: 0115 945 1143 Email: [email protected]

Saint-Gobain Isover Gotham Road East Leake Loughborough Leicestershire LE12 6HX Tel: +44 (0) 115 969 8010 Email: [email protected]

Isover reserves the right to revise product specifications without notice. The information in this document was correct to the best of our knowledge at the time of publication. It is the users

responsibility to ensure that it remains current prior to use. The information in this document is for guidance only and should not be read in isolation. Users should read and familiarise

themselves with all the information contained in this document and ensure that they are fully conversant with the products and systems being used, before subsequent specification or

installation. For a comprehensive and up to date library of information visit the Isover website.

Documents

Isover Solutions Guide - Specifying Cavity Barriers · ‘Cavity barriers should be used to sub-divide any cavity, including any roof space, so that the distance between cavity barriers