Floors | Walls | Roofs · 2009-07-23 · Floors | Walls | Roofs APPLICATION: Internally Lined...

Floor

s | W

alls |

Roo

fsAPPLICATION:

Internally LinedPitched Roof

PRODUCTS:

Jablite Premium boardJablite board

Vencel Resil Limited

Head Office: Infinity House, Anderson Way, Belvedere, Kent DA17 6BG Tel: 020 8320 9100 Fax: 020 8320 9110

Technical Services: Tel: 0870 444 8769 Fax: 020 8320 9142 Email: [email protected]

Sales Office: Boothferry Works, Howden, Nr Goole, East Riding of Yorkshire DN14 7EA Tel: 0870 600 3666

Fax: 0870 600 2555 Email: [email protected] Website: www.jablite.co.uk

Technical supportVencel Resil provides technical and

design support and has a dedicated

team of professionals who have

extensive experience of working in the

industry. Many clients find the technical

support they receive invaluable in

ensuring that specifications are in line

with modern building requirements.

Being more than just a manufacturer of

EPS products, it is the company’s

expertise within this sector and the

knowledge within its team which

establishes Vencel Resil as one of the

leading providers of high performance

insulation.

Jablite – a market leadinginsulation materialVencel Resil has a major UK

manufacturing base, where its Jablite

expanded polystyrene products can be

produced to specific grades and

thicknesses to suit clients’ needs. As

such, the company is constantly seeking

ways to enhance the performance of the

range. Jablite EPS is a proven insulation

material, widely regarded as one of the

most effective on the market, offering

high thermal performance, unrivalled

sustainability credentials, long-term

durability, whilst ensuring its cost

effectiveness in the market.

Jablite PremiumJablite Premium is an innovative Low

Lambda (EPS) insulation material that

has the capacity to enhance a building’s

thermal performance by up to 20%. This

enables builders and contractors to meet

ever tightening Building Regulations

without having to change their build

practices

A relatively new innovation in EPS

insulation, Jablite Premium is becoming

widely used in the floors, walls and roofs

of domestic, public sector and

commercial buildings. Instantly

recognisable by its distinctive grey board

with orange speckles, it provides the

reassurances to architects, specifiers and

contractors that the material used on

site is the same as the one specified and,

crucially, that the resulting performance

matches the approved design intent.

A major benefit of Jablite Premium is

that it offers improved U-values without

having to alter the thickness of the

cavity wall or change the construction

of the floor or roof. This ensures

contractors on site maintain their

efficiency, whilst clients benefit from

maximum internal floorspace and low

running costs.

Vencel Resil is one of the UK’s largest manufacturer’s of expanded

polystyrene (EPS) and under the Jablite brand, supplies a range of

bespoke insulation products and solutions to the construction,

industrial and housebuilding markets. Vencel Resil specialises in

providing industry-leading insulation solutions that meet current

and future Building Regulations requirements for the

specification of floors, walls and roofs of commercial, public

sector and residential buildings.

Established in 1973, the company has been a member of the Synbra Group since

1996. Synbra is a multi-national organisation specialising in producing high quality

EPS products throughout Europe. Being part of a European group means having the

benefit of access to extensive resources and technology.

2

BRE Green Guide toSpecification The Green Guide, produced by the

British Research Establishment (BRE),

assesses a range of building

products’ environmental

performance over their full life-span

and awards them with a

sustainability rating.

EPS has achieved an A+, which is the

highest rating possible and clearly

demonstrates the material’s

excellent thermal and environmental

credentials. The BRE ranks materials

on the basis that the benefit of using

any of the insulation types listed in

the guide will outweigh

the embodied environmental impact

of their manufacture, installation

and end-of-life disposal.

Environmental credentialsExpanded polystyrene is recognised

for its excellent energy efficiency

and low environmental impact.

It has an ODP (Ozone Depletion

Potential) of zero and a low GWP

(Global Warming Potential), which is

exemplary. Vencel Resil is fully

committed to sustainability in all

areas of its operation. Energy saving

and modern methods of

construction are all carefully

considered when researching and

developing new products, as well as

end of life recyclability.

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APPLICATION:Roof insulation – internally lined pitched roof

Jablite Premium board is commonly used to upgrade buildings, it is equally applicable

to new build and can also be used on existing cold-deck flat-roof constructions.

Jablite Premium board can be used in conjunction with 12.5mm-thick plasterboard to

provide both insulation and a ceiling finish to the underside of a pitched roof.

Product: Jablite Premium board

Jablite Premium boardJablite Premium board is intended for

insulating new or existing roofs, or for

increasing the performance of such

elements where the original insulation

standards are not adequate. By using this

technique, existing roofs can be upgraded

to meet the current Building Regulations’

insulation requirements.

Easy to handleJablite Premium board is manufactured

from low lambda expanded polystyrene

(EPS), and is lightweight and easy to

handle on site.

PermanentJablite Premium Board is rot-proof and

durable and will remain effective for the

life of the building. The recommended

fixing methods will retain the insulation

permanently in position.

EnvironmentExpanded polystyrene has been awarded

an A+ rating by the BRE’s Green Guide to

Specification.

VentilationApplied beneath and/or between the

rafters, Jablite Premium board maintains

the required ventilation space to the

underside of the sarking membrane or the

roof deck.

Rapid heat responseRoof constructions which have been

internally insulated with Jablite Premium

board respond rapidly to heat input and

good standards of comfort are readily

obtained.

TypeJablite Premium board is supplied as EPS

70 as defined in Bs En 13163 - Reaction to

Fire Class E – containing a flame retardant

additive.

DimensionsStandard size: 2400 x 1200mm.

Thickness: 25, 30, 40, 50, 60, 75, 100, 120,

150 and 200mm; other thicknesses

available to order.

FireWhen properly installed, the insulation is

protected by the plasterboard or other

lining and will have no adverse effect on

either the surface spread of flame rating or

the fire resistance of the roof lining.

Water-vapour transmissionJablite Premium board has a significant

resistance to the passage of water, but

should not be regarded as a vapour-control

layer. The risk of interstitial condensation is

reduced by lacing a vapour-control layer

between the Jablite Premium board and

the plasterboard facing, or by using

plasterboard which incorporates an

integral vapour control membrane.

U-valuesTable 27.1 shows the thicknesses of Jablite

Premium board required to meet various

U-values where the insulation is positioned

between and below the rafters/joists.

Table 27.2 shows the thicknesses of Jablite

board required to meet various U-values

where the insulation is positioned wholly

between the rafters/joists. Their calculation

complies with the procedures contained in

the “Conventions for U-value calculations”

document accompanying the Building

Regulations. The values given are based on

a k-value of 0.030W/mK for the insulation

and are calculated in accordance with

BS EN ISO 6946.

Thermal resistanceThe thermal resistance, R-value, of

Jablite Premium board for a range of

thicknesses is as follows:

25mm 0.83m2K/W

30mm 1.00m2K/W

40mm 1.33m2K/W

50mm 1.67m2K/W

60mm 2.00m2K/W

75mm 2.50m2K/W

100mm 3.33m2K/W

120mm 4.00 m2K/W

150mm 5.00 m2K/W

200mm 6.66 m2K/W

These figures can be used for calculating

U-values for constructions not described in

the tables.

Roof Insulation4

For technical information 0870 444 8769

[email protected]

Roof insulation – internally lined pitched roof

U-values(W/m²K)

400mm Centres 600mm Centres

Thickness in mm

0.14 220 200

0.16 180 165

0.18 150 135

0.20 125 115

0.25 85 80

0.30 55 55

0.35 40 35

0.40 25 25

0.45 25 25

Cold pitched roofs require a 50mm clear ventilated airspace below the sarking

membrane. There are accredited ‘Breathable Membranes’ which when used as a sarking

layer may allow the airspace to be reduced. For recommended air spaces the advice of

the membrane manufacturer should be sought.

Table 27.1

Jablite Premium board between 50mm wide rafters at thestipulated centres, with a 50mm continuous insulationboard placed below the rafters.

U-values(W/m²K)


Thickness in mm

0.14 280 255

0.16 245 225

0.18 220 200

0.20 195 180

0.25 155 140

0.30 130 115

0.35 110 100

0.40 95 85

0.45 85 75

Table 27.2

Jablite Premium board between 50mm wide rafters at thestipulated centres.

Roof tile, battens and sarking felt specification

Timber batten or other backstop

12.5mm Plasterboard

Vapour-control layer

Ventilated void(min. 50mm)

Jablite Premium board

NOTE: Maximum thickness of Jablite Premium Board below rafter is 50mm

Figure 27.1

INSTALLATION

Figure 27.2

Pitched-roof double layer insulation

1

3 4 5

2 61. Jablite Premium Board

2. Ventilated void

3. Vapour-control layer

4. 12.5mm Plasterboard

5. Timber batten or other backstop

6. Tiles or slates on battens and sarking felt


Roof

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Figures 27.2 – 27.4 show typical methods

of installing Jablite Premium board to

pitched and flat roofs.

Vapour-control layer The risk of interstitial condensation can be

reduced by placing a vapour-control layer

between the Jablite Premium board and

the plasterboard facing or by using


integral vapour control membrane. All

vapour control membranes and boards

should be sealed at joints and at all

abutments with a suitable mastic sealant.

ServicesService runs should be installed before the

lining and secured to the rafters. Jablite

Premium board should not be allowed to

come into direct contact with PVC-

sheathed cable, nor closer than 12mm to

hot-water pipes; cables should be

protected by the use of a physical barrier,

for example by being enclosed in a

conduit. Where cables are surrounded by

insulation they should be de-rated in

accordance with the recommendations

given in BRE Defect Action Sheet 62.

Pitched roofsBackstops, typically of 25 x 25mm timber

battens, should be attached to the rafters

in such a way that a 50mm ventilation

gap will be maintained above the

insulation material. The first layer of

Jablite Premium board should be cut to fit

snugly between the rafters and push-fitted

into position up to the backstop, with the

ends of adjacent boards tightly butted. If

necessary, a second layer of insulation

should be cut to span across the rafters,

completely covering the first, and should

be lightly pinned in position until the

plasterboard is fixed. (See figure 27.2).

If the plasterboard does not incorporate a

vapour-control membrane, then a separate

vapour control, consisting of a minimum

1000g polythene, should be placed over

the insulation, and the edges and joints

sealed. Finally, the plasterboard should be

fixed to the rafters in accordance with the

manufacturer’s instructions, and finished

as required.

Flat roofsThe method of installation is generally as

described for pitched roofs but in many

cases the dimensions of the timber roof

joists will be sufficient to allow all of the

required thickness of insulation to be

accommodated within the depth of the

joist, (See figure 27.3). If this is not

possible, then a second layer of insulation

should be attached to span across the

joists as described above. (See figure

27.4). It is important in this type of

construction to ensure adequate

ventilation above the insulation by

provision of air gaps at the roof perimeter.

See BRE document – Insulation avoiding

the risks. The vapour-control layer should

be placed between the insulation and the

plasterboard.

Composite boardsThe manufacturers of proprietary

EPS/plasterboard and other EPS insulated

composite boards have developed a range

of adhesive and mechanical fixing systems

for their products used in this application

and their recommendations should be

followed. Further information on

manufacturers and suppliers of these

products is available from Vencel Resil's

technical services department.

Figure 27.4

Flat-roof double layer insulation

Figure 27.3

Flat-roof single layer insulation

ReferencesBRE Defect Action Sheet 62. Electrical services: avoiding cable overheating.

BS EN 13163 Thermal insulation products for buildings – Factory made products of expanded polystyrene (EPS) – Specification.

BRE Report 262, Thermal insulation: avoiding risks –third edition 2002.

1

3 4 5

2 6

1. Jablite Premium Board

2. Ventilated void




6. Timber deck and weatherproofing

3 4 5

1 2 61. Jablite Premium Board

2. Ventilated void






Roof Insulation6


[email protected]

Roof

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lati

on7Fo

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chni

cal i

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mat

ion

087

0 44

4 87

69te

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jabl

ite.

co.u

k


Jablite board is commonly used to upgrade buildings, it is equally applicable to

new build and can also be used on existing cold-deck flat-roof constructions.

Jablite board can be used in conjunction with 12.5mm-thick plasterboard to

provide both insulation and a ceiling finish to the underside of a pitched roof.

Product: Jablite board

Jablite boardThe Jablite board is intended for insulating

new or existing roofs, or for increasing the

performance of such elements where the

original insulation standards are not

adequate. By using this technique, existing

roofs can be upgraded to meet the current

Building Regulations’ insulation

requirements.

Easy to handleJablite board is manufactured from

expanded polystyrene (EPS), and is

lightweight and easy to handle on site.

PermanentJablite Board is rot-proof and durable and

will remain effective for the life of the

building. The recommended fixing

methods will retain the insulation

permanently in position.

EnvironmentExpanded polystyrene has been awarded

an A+ rating by the BRE’s Green Guide to

Specification.

VentilationApplied beneath and/or between the

rafters, Jablite board maintains the

required ventilation space to the underside

of the sarking membrane or the roof deck.

Rapid heat responseRoof constructions which have been

internally insulated with Jablite board

respond rapidly to heat input and good

standards of comfort are readily obtained.

TypeJablite board is supplied as EPS 70 as

defined in BS EN 13163 – Reaction to Fire

Class E – containing a flame retardant

additive.

DimensionsStandard size: 2400 x 1200mm.

Thickness: 25, 30, 40, 50, 60, 75, 100, 120,

150 and 200mm; other thicknesses

available to order.

FireWhen properly installed, the insulation is

protected by the plasterboard (or other)

lining and will have no adverse effect on

either the surface spread of flame rating or

the fire resistance of the roof lining.

Water-vapour transmissionJablite board has a significant resistance to

the passage of water, but should not be

regarded as a vapour-control layer.

The risk of interstitial condensation is

reduced by placing a vapourcontrol layer

between the Jablite board and the

plasterboard facing, or by using


integral vapour control membrane.

U-valuesTable 28.1 shows the thicknesses of Jablite

board required to meet various U-values

where the insulation is positioned between

and below the rafters/joists. Table 28.2

shows the thicknesses of Jablite board

required to meet various U-values where

the insulation is positioned wholly

between the rafters/joists. Their calculation

complies with the procedures contained in

the “Conventions for U-value calculations”

document accompanying the Building

Regulations. The values given are based on

a k-value of 0.038W/mK for the insulation

and are calculated in accordance with BS

EN ISO 6946.

Thermal resistanceThe thermal resistance, R-value, of

Jablite board for a range of thicknesses is

as follows:

25mm 0.65m2K/W

30mm 0.79m2K/W

40mm 1.05m2K/W

50mm 1.30m2K/W

60mm 1.55m2K/W

75mm 1.95m2K/W

100mm 2.60m2K/W

120mm 3.15 m2K/W

150mm 3.94 m2K/W

200mm 5.26 m2K/W

These figures can be used for calculating

U-values for constructions not described

in the tables.

Roof Insulation8


[email protected]


U-values(W/m²K)


Thickness in mm

0.14 275 260

0.16 230 215

0.18 195 180

0.20 170 155

0.25 120 110

0.30 85 80

0.35 60 60

0.40 45 40

0.45 30 30

U-values(W/m²K)


Thickness in mm

0.14 325 300

0.16 290 265

0.18 255 235

0.20 230 215

0.25 185 170

0.30 150 140

0.35 130 120

0.40 110 105

0.45 100 90

Cold pitched roofs require a 50mm clear ventilated airspace below the sarking

membrane. There are accredited ‘Breathable Membranes’ which when used as a sarking

layer may allow the airspace to be reduced. For recommended air spaces the advice of

the membrane manufacturer should be sought.

Table 28.1

Jablite 70E board between 50mm wide rafters at thestipulated centres, with a 50mm continuous insulationboard placed below the rafters.

Table 28.2

Jablite 70E board between 50mm wide rafters at thestipulated centres.

Roof tile, battens and sarking felt specification

Timber batten or other backstop

12.5mm Plasterboard

Vapour-control layer

Ventilated void(min. 50mm)

Jablite board

NOTE: Maximum thickness of Jablite Board below rafter is 50mm

Figure 28.1

INSTALLATION

Figure 28.2

Pitched-roof double layer insulation

1

3 4 5

2 61. Jablite Board

2. Ventilated void




6. Tiles or slates on battens and sarking felt


Roof

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lati

on9Fo

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chni

cal i

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mat

ion

087

0 44

4 87

69te

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jabl

ite.

co.u

k

Roof Insulation10


[email protected]

Figures 28.2 – 28.4 show typical methods

of installing Jablite board to pitched and

flat roofs.

Vapour-control layer The risk of interstitial condensation can be

reduced by placing a vapour-control layer

between the Jablite board and the

plasterboard facing or by using


integral vapour control membrane. All

vapour control membranes and boards

should be sealed at joints and at all

abutments with a suitable mastic sealant.

ServicesService runs should be installed before the

lining and secured to the rafters. Jablite

board should not be allowed to come into

direct contact with PVC-sheathed cable,

nor closer than 12mm to hot-water pipes;

cables should be protected by the use of a

physical barrier, for example by being

enclosed in a conduit. Where cables are

surrounded by insulation they should be

de-rated in accordance with the

recommendations given in BRE Defect

Action Sheet 62.

Pitched roofsBackstops, typically of 25 x 25mm timber

battens, should be attached to the rafters

in such a way that a 50mm ventilation

gap will be maintained above the

insulation material. The first layer of

Jablite board should be cut to fit snugly

between the rafters and push-fitted into

position up to the backstop, with the ends

of adjacent boards tightly butted. If

necessary, a second layer of insulation

should be cut to span across the rafters,

completely covering the first, and should

be lightly pinned in position until the

plasterboard is fixed. (See figure 28.2).

If the plasterboard does not incorporate a

vapour-control membrane, then a separate

vapour control, consisting of a minimum

1000g polythene, should be placed over

the insulation, and the edges and joints

sealed. Finally, the plasterboard should be

fixed to the rafters in accordance with the

manufacturer’s instructions, and finished

as required.

Flat roofsThe method of installation is generally as

described for pitched roofs but in many

cases the dimensions of the timber roof

joists will be sufficient to allow all of the

required thickness of insulation to be

accommodated within the depth of the

joist. (See figure 28.3). If this is not

possible, then a second layer of insulation

should be attached to span across the

joists as described above. (See figure 28.4).

It is important in this type of construction

to ensure adequate ventilation above the

insulation by provision of air gaps at the

roof perimeter. See BRE document –

Insulation avoiding the risks. The vapour-

control layer should be placed between

the insulation and the plasterboard.

Composite boardsThe manufacturers of proprietary

EPS/plasterboard and other EPS insulated

composite boards have developed a range

of adhesive and mechanical fixing systems

for their products used in this application

and their recommendations should be

followed. Further information on

manufacturers and suppliers of these

products is available from Vencel Resil's

technical services department.

Figure 28.4

Flat-roof double layer insulation

Figure 28.3

Flat-roof single layer insulation

ReferencesBRE Defect Action Sheet 62. Electrical services: avoiding cable overheating.

BS EN 13163 Thermal insulation products for buildings – Factory made products of expanded polystyrene (EPS) – Specification.

BRE Report 262, Thermal insulation: avoiding risks –third edition 2002.

1

3 4 5

2 6

1. Jablite Board

2. Ventilated void





3 4 5

1 2 61. Jablite Board

2. Ventilated void






Floors | Walls | Roofs · 2009-07-23 · Floors | Walls | Roofs APPLICATION: Internally Lined...

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Transcript of Floors | Walls | Roofs · 2009-07-23 · Floors | Walls | Roofs APPLICATION: Internally Lined...