Energy saving for the future - POLYISOCYANURATE INSULATION BOARD FOR PITCHED ROOFS
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CI/SfB
(23.4) Rn7 (M2)
APRIL 2021
POLYISOCYANURATE
INSULATION BOARD
FOR PITCHED ROOFS
energy saving for the future
Introduction
Ballytherm Insulation
This brochure describes the use of Ballytherm Polyisocyanurate insulation About Ballytherm
to create well insulated, energy efficient buildings; it contains design
Ballytherm is committed to the
guidance, design details, installation instructions and advice on sitework
manufacture and supply of effective
for using Ballytherm in all pitched roofing applications.
insulation products to the construction
industry.
Introduction 2-4
Ballytherm operates from a purpose built
manufacturing plant in County Cavan
Warm Pitched Roofs 5 - 11 from where its products are distributed
Ballytherm Insulation board is ideal for to the Republic of Ireland, Northern
forming warm pitched roofs in new build Ireland and the United Kingdom.
and refurbishment projects.
Ballytherm can supply insulation from
stock or can produce bespoke boards to
match the requirements of a specific
project.
Sitework/References 12 - 13
Ballytherm Insulation may be ordered
through builders' merchants or directly Ballytherm Insulation
from Ballytherm. Call us for details of our Ballytherm Insulation is a foil-faced
overnight delivery service. Polyisocyanurate (PIR) insulation board.
The PIR board is formed by a continuous
foaming process which gives the board
its tight cell structure and bonds the
facing to the foam. After foaming the
boards are cut to size and left to cure.
Introduction
02
Introduction
Ballytherm Pitched Roof Insulation
Technical description Table 01 Ballytherm Insulation product dimensions
Dimensions Characteristics Units Values
Ballytherm Insulation roof boards are Length 2400
available in 2400 by 1200mm size and in Width mm 1200
thicknesses from 25mm up to 150mm Thicknesses 25, 30, 40, 50, 60, 70, 75, 80, 90, 100, 110, 120, 125,
130, 140, 150, 160 (non-stock) & 165 (non-stock)
thick. Ballytherm roof boards are butt
edged. Edge profile Butt edged
Appearance
Ballytherm insulation boards have a
yellow foam core with laminated foil
facings printed with the company logo.
Structural CERTIFICATE Nos. 07/4422 & 07/4427
Certificate No. 05/0220
Ballytherm is a strong, rigid board
suitable for self-supporting applications
in floors, walls and roofs. It can
withstand the loadings in
groundbearing floors.
Environmental
Ballytherm Insulation is produced with a
zero ozone depletion blowing agent.
The Insulation boards' low thermal
conductivity mean less material is
required to achieve a given thermal
resistance than for most other insulants.
Ballytherm Insulation has a GWP
(Global Warming Potential) of
Introduction
Ballytherm Insulation
Fire
Table 02 Performance of Ballytherm Roof Insulation
Ballytherm Insulation remains stable at
Properties Standards Units Values
temperatures up to 400ºC; at higher
temperatures a protective char forms on Thermal conductivity I.S. EN 12667 W/mK 0.022
the surface, slowing the spread of flame.
Compressive strength EN 826 kPa >140
Ballytherm insulation may be used safely
behind non-flammable materials such as Dimensional stability EN 1604 DS(TH) 6
plasterboard; it has achieved a Class 1
Water absorption EN 12087 % vol Foil 1.2
surface spread of flame rating when
tested to BS 476-7:1997.
Moisture Table 03 Ballytherm Roof Insulation pack sizes and thermal performance
The PIR core of Ballytherm Insulation
Sheets Sheets m2 Thermal
boards has a low moisture absorption Thickness per lift per pallet per pallet resistance
capacity, making Ballytherm Insulation
25mm 56 112 328.32 1.136m2K/W
suitable for use in damp environments.
30mm 46 92 270.72 1.364m2K/W
The foil laminate facing gives the boards
40mm 36 72 201.60 1.818m2K/W
a high vapour resistance.
50mm 28 56 161.28 2.272m2K/W
Biological 60mm 23 46 132.48 2.727m2K/W
70mm 20 40 115.20 3.181m2K/W
Ballytherm Insulation does not rot and
75mm 18 36 103.68 3.409m2K/W
does not contribute to the growth of
80mm 17 34 97.92 3.636m2K/W
mould, nor does it support insects or
90mm 15 30 86.40 4.091m2K/W
other pests.
100mm 14 28 80.64 4.545m2K/W
Thermal 110mm 12 24 69.12 5.000m2K/W
The PIR core of Ballytherm Insulation 120mm 11 22 63.36 5.454m2K/W
boards has an extremely low thermal 125mm 11 22 63.36 5.681m2K/W
conductivity, making the required 130mm 10 20 57.60 5.909m2K/W
thickness of insulation less than for most 140mm 10 20 57.60 6.363m2K/W
other insulants. The foil laminate facings 150mm 9 18 51.84 6.818m2K/W
of Ballytherm boards can also contribute 160mm (non-stock) 8 16 - 7.272m2K/W
to improved thermal performance: the 165mm (non-stock) 8 16 - 7.500m2K/W
low emissivity surface of the reflective
foil can cut radiation heat transfer across
an adjoining air space.
Durability
When Ballytherm Insulation is installed
Introduction
in accordance with manufacturer's
guidance and industry codes of practice
it has a service life comparable to that of
the rest of the building.
04
Warm Pitched Roofs
General considerations
Introduction General considerations
In warm roof constructions the insulation Structural However, in refurbishment projects the
is fitted in the plane of the rafters rather The insulation in warm roof applications air movement through the cavities will
than at ceiling line. must be self-supporting. Where it is laid eliminate much of the benefit from the
across the top of the rafters it must be low emissivity surface.
Warm roofs enable all the space within
able to withstand the imposed loads
the building envelope to be utilised, Condensation
from the roof covering transferred
whether that means maximising the Roofs must be designed to avoid the
through the counterbattens. Ballytherm
usable floor area, creating dramatic formation of condensation which can
Insulation is strong enough for that
cathedral roofs or simply providing a threaten the structural stability of the
application.
controlled environment for running roof and promote the growth of mould
complex services. Warm roof Thermal performance and rot. Designers should carry out
construction has benefits for the roof Ballytherm insulation installed above or condensation risk analysis to assess the
structure, protecting it from the effects below the rafters is not affected by likelihood of problems and modify the
of wide variations in temperature and thermal bridging by the roof structure, roof design if condensation is predicted.
humidity and also increases the racking whereas the thermal performance of an
To reduce condensation risk, designers
strength. insulation layer set between the rafters is
should:
reduced by as much as a third.
Ballytherm insulation boards are ideal for - minimise the amount of moisture
forming warm pitched roofs: in new Although using more insulation above entering the roof: moisture generated
build the insulation can be fitted over the rafters will improve the thermal by activities such as washing and
and between the rafters, or between and performance it can create problems: the cooking should be extracted at source
beneath the rafters, while in forces upon the fixings increase, so more and a vapour control layer - such as
refurbishment projects the insulation fixings are required; detailing at eaves 1000 gauge polyethylene - should be
can be installed from inside the loft to becomes more complex, and it also specified on the warm side of the
upgrade the thermal performance of the becomes more difficult to drive the insulation.
roof without disturbing the existing roof fixings accurately into the rafters. - ensure any moisture which does enter
covering. Consequently, it is important to avoid an can escape to atmosphere: specify a
excessive amount of insulation above vapour open underlay which will
the rafters by installing some insulation allow water vapour to disperse into
between the rafters. the batten space and ensure there is
Cavities sufficient air movement between the
batten space and atmosphere (it may
Where Ballytherm insulation takes up
be necessary to vent the batten space
only part of the rafter depth, the
beneath tight coverings such as sheet
resulting cavities will each have a low
metal). In refurbishment projects
emissivity surface formed by the
where the underlay has a high vapour
reflective foil face of the board.
resistance there must be a 50mm
Pitched Roofs
Those surfaces will then reduce the rate vented cavity beneath the underlay.
of radiation heat transfer across the
cavity and improve the thermal Further guidance on controlling
performance of the roof. condensation may be found in 05
BS 5250: 2011.
Warm Pitched Roofs
Insulating above and between the rafters
“...is well suited to new
build projects and to
refurbishments...”
8
5
3
2
7
Ballytherm wall insulation boards 1
Ballytherm roof insulation boards 2
between rafters
Ballytherm roof insulation boards 3
above rafters
6 Stop batten 4
Counterbatten 5
4 Eaves piece 6
Breather membrane 7
Roof covering 8
1
Insulating above and between the rafters
Figure 01
Ballytherm insulation may be used to minimises the thickness of insulation battens, clips or partially driven nails.
form warm pitched roofs by applying it required, whilst it is strong enough to The insulation is protected by the
over and between the rafters. support the loads imposed from the roof internal finish fixed to the underside of
Applying a layer of insulation over the covering via the battens. the rafters. The reflective surface of the
rafters brings the whole roof within the boards reduce radiation heat loss across
The Ballytherm boards should be set in
insulated envelope and maximises the the air spaces and further improve the
two layers, one extending in a
available head room. This method is well thermal performance of the roof.
continuous layer over the top of the
suited to new build projects and to
rafters, which is restrained by The thickness of Ballytherm insulation
refurbishments where the roof covering
counterbattens, and the second cut to fit required to meet regulations may be
is being stripped off and replaced.
between the rafters and held in place by determined from table 04.
The properties of Ballytherm insulation
match those required for this
application: its low thermal conductivity
U-values (W/m2K) calculated according to
Table 04 Thickness (mm) of Ballytherm required for insulating above and between rafters
Pitched Roofs
ISO 6946: 2017.
U-value Above Above and between
These calculations are approximate and can vary
0.14 - 70 + 90
with different constructions etc.
0.16 - 55 + 95
Roof construction: tiles, battens and counterbatten
cavity, vapour open underlay, Ballytherm board above 0.18 - 50 + 70
06 rafters, Ballytherm board between rafters (second 0.20 95 50 + 55
column only), low emissivity cavity, plasterboard.
Design guidance At ridges, hips and valleys where roof
planes intersect, the over-rafter
Where condensation risk analysis
insulation should be cut to form a
indicates a risk of condensation a vapour
continuous layer of insulation. Junctions
control layer should be installed behind
may be sealed with expanding foam
the finish.
insulation.
The underlay should have a vapour
resistance of less than 0.25MNs/g and Sitework
may be laid directly over the insulation
When working at a height ensure risk
or draped over the counterbattens.
assessments have been carried out and
A rigid eaves carrier may be required to
that all necessary protective measures
prevent ponding and avoid UV
are in place. Do not walk on Ballytherm
degradation. Counterbattens should be
boards nor use them as a working
a minimum of 38 x 50mm and should be Eaves
platform.
fixed through the Ballytherm boards to Figure 02
the rafters with fixings such as Helfix Installation sequence (working from
Inscrew or Proctor PR nails: consult the the outside)
fixing manufacturer for information on 1. Fit battens to the sides of the rafters
loadings and spacings. There should be a to support the between rafter
stop batten fixed across the rafters at insulation.
eaves to prevent the insulation slipping 2. Cut Ballytherm insulation to fit tightly
down the roof. between the rafters. Set insulation on
There is no need to ventilate beneath the battens.
the underlay, but there must be 3. Fix a stop batten across the ends of
sufficient air movement between the the rafters.
Abutment
batten space and outside air to allow 4. Lay the first row of Ballytherm
Figure 03
moisture to disperse. Roof coverings insulation boards across the rafters,
such as tiles and slates will allow enough resting firmly against the stop batten.
air flow through the laps, however, air Tack in place with clout nails.
spaces beneath tight coverings should 5. Lay the next rows of Ballytherm
be vented. insulation boards. Stagger board
To avoid thermal bridging the roof junctions between rows.
insulation should meet that in the walls: 6. Fix counterbattens to the rafters.*
if a cavity wall is finished with a closer, 7. Lay the underlay, following
additional insulation should be fitted manufacturer's instructions.
from the top of the closer to the upper 8. Install the roof covering Verge
face of the rafters, where it will butt the
Pitched Roofs
Figure 04
over-rafter insulation. At verges the wall
Points to watch
insulation should run to the top of the
- Cut boards to fit neatly around * where the underlay is installed under
wall and butt the underside of the over-
penetrations such as SVPs. the counterbattens reverse the order
rafter insulation which is extended
of points 6 and 7. 07
across the wall head. - Seal gaps and junctions with
expanding foam.
Warm Pitched Roofs
Insulating between and below the rafters
“...is well suited to projects
where the roof covering
is being stripped off
7 and replaced...”
6
3
2
Ballytherm wall insulation boards 1
Ballytherm roof insulation boards 2
beneath rafters
Ballytherm roof insulation boards 3
4 between rafters
5 Ballytherm roof insulation infill 4
Eaves piece 5
Breather membrane 6
Roof covering 7
1 Insulating between and below the rafters
Figure 05
Ballytherm insulation may be used to The properties of Ballytherm insulation The insulation is protected by the
form warm pitched roofs when applied match those required for this internal finish. The reflective surface of
between and below the rafters. application: its low thermal conductivity the boards reduce radiation heat loss
Applying a layer of insulation beneath minimises the thickness of insulation across the air spaces and further improve
the rafters avoids the use of long fixings required, whilst it is strong enough to the thermal performance of the roof.
and enables all the insulation to be span the distances between the rafters
The thickness of Ballytherm insulation
applied from inside the roof. without bowing. The Ballytherm boards
required to meet regulations may be
This method is well suited to new build should be set in two layers, one set
determined from table 05.
projects and to refurbishments where between the rafters and the second
the roof covering is being stripped off extending in a continuous layer across
and replaced. the underside of the rafters and
restrained by battens.
U-values (W/m2K) calculated according to
Table 05 Thickness (mm) of Ballytherm required for insulating between and below rafters
ISO 6946: 2017.
Pitched Roofs
These calculations are approximate and can vary U-value Between and below
with different constructions etc.
0.14 100 + 60
Roof construction: tiles, batten cavity, vapour open
0.16 100 + 50
underlay, Ballytherm board between rafters,
Ballytherm board beneath rafters, low emissivity 0.18 100 + 40
08 cavity, plasterboard. 0.20 100 + 25
Design guidance At ridges, hips and valleys where roof
planes intersect, the under-rafter
Where condensation risk analysis
insulation should be cut to form a
indicates a risk of condensation a vapour
continuous layer of insulation. Junctions
control layer should be installed behind
may be sealed with expanding foam
the finish. The two layers of insulation
insulation. a
should be in contact to minimise air
movement between them: timber
battens fixed to the sides of the rafters
Sitework
may be used to restrain the insulation When working at a height ensure risk
between the rafters. assessments have been carried out and
that all necessary protective measures
The underlay should have a vapour
are in place. Do not walk on Ballytherm
resistance of less than 0.25MNs/g and
boards nor use them as a working Eaves
may be draped over the rafters or the
platform. Figure 06
counterbattens. A rigid eaves carrier may
be required to prevent ponding and Installation sequence (working from
avoid UV degradation. There is no need inside the roof)
to ventilate beneath the underlay, but 1. Fix timber battens to the sides of the
there must be sufficient air movement rafters so the space below the battens
between the batten space and outside matches the thickness of the
air to allow moisture to disperse: Ballytherm Insulation boards.
counterbattens (min. 38 x 50mm) may 2. Cut Ballytherm insulation boards to fit
be used to form a deep air space above tightly between the rafters. Starting
the underlay. Roof coverings such as tiles at eaves, fit the boards between the
and slates will allow enough air flow rafters, starting at eaves and working Abutment
through the laps, however, air spaces towards the ridge. Push the boards Figure 07
beneath tight coverings should be against the battens.
vented.
3. Set Ballytherm boards across the
To avoid thermal bridging the roof underside of the rafters in a
insulation should meet the insulation in continuous layer. Secure with timber
the walls: where a cavity wall is finished battens. Tape board joints with b
with a closer, additional insulation Ballytherm metalised tape.
should be fitted from the top of the 4. Fix plasterboard to the battens and
closer to the upper face of the rafters, skim.
where it will butt the Ballytherm Points to watch
insulation between the rafters (figure Verge
- At verges cut and fit Ballytherm
06). At verges the wall insulation should Figure 08
insulation between the wall and first
Pitched Roofs
extend to the top of the wall, the gap
rafter.
between the wall and the first rafter NOTES
- Cut boards to fit neatly around
should be packed with insulation and a additional insulation to avoid thermal
penetrations such as SVPs.
the insulation under the rafter should be bridging
butted and sealed against the wall - Seal gaps and junctions with b insulation between inner face of wall 09
and joist
(figure 08). expanding foam.
Loft conversions
Insulating between and below the rafters
“...is well suited to
loft conversions
7 and refurbishment
5
4 projects where the
roof covering is
being retained...”
6 1 Internal finish 1
2
Ballytherm wall insulation boards 2
3 Ballytherm wall insulation boards 3
between timber studs
Ballytherm roof insulation boards 4
beneath rafters
Ballytherm roof insulation boards 5
between rafters
Roof underlay 6
Roof covering 7
Loft conversions
Figure 09
Ballytherm insulation may be used to The Ballytherm boards should be set in The thickness of Ballytherm insulation
form warm pitched roofs when applied two layers, one layer between the rafters required to meet regulations may be
between and below the rafters. and the second extending across the determined from table 06.
This method is well suited to loft underside of the rafters and restrained
conversions and refurbishment projects by battens. The insulation is protected Design guidance
where the roof covering is being by the internal finish fixed to the
Where the existing construction includes
retained. The properties of Ballytherm underside of the rafters.
an underlay with a high vapour
insulation match those required for this
The reflective surface of the boards resistance, such as a 1F bituminous felt,
application: its low thermal conductivity
reduce radiation heat loss across the air there is a risk of condensation forming
minimises the thickness of insulation
spaces and further improves the thermal on the underside of the underlay and
required, whilst it is strong enough to
performance of the roof. damaging the roof.
span the distances between the rafters
without bowing.
U-values (W/m2K) calculated according to
ISO 6946: 2017. These calculations are Table 06 Thickness (mm) of Ballytherm required for insulating loft conversions
approximate and can vary with different
Pitched Roofs
constructions etc. U-value Between and below
Roof construction: tiles, batten cavity, bituminous 0.14 100 + 65
underlay, ventilated cavity, Ballytherm board 0.16 100 + 40
between rafters, Ballytherm board beneath rafters,
0.18 100 + 25
plasterboard.
10 *For Scotland the lower U-value limit applies if the
0.20 100 + 25
original roof has a U-value worse than 0.25W/m2K.To minimise that risk there must be Gable walls should be insulated with section through stud wall
50mm min. air space between the Ballytherm Insulation board fitted
insulation and the underlay, vented to behind the plasterboard lining. It is good
remove moist air to atmosphere and practice to improve the thermal
prevent a harmful build up. To assist performance of the ceiling beyond the
with setting the insulation at the correct stud walls by laying insulation across the
depth and prevent it blocking the air ceiling joists, taking care not to block
spaces, timber battens may be fixed to any eaves vents.
the sides of the rafters as stops: with a
To minimise heat loss through service
draped underlay, the air space should be
penetrations the plasterboard lining may
75mm deep when measured at rafters to
be set on battens to form a cavity for
give the 50mm minimum depth at the Junction of roof slope and stud wall
running services. At roof windows the
centre of the air space. Each air space Figure 10
insulation should be butted tightly to
should be vented with a vent opening
the back of the frames. Gaps at
equivalent to a 25mm continuous
penetrations should be sealed with
opening at the base and 5mm at the top:
expanding foam.
that requirement applies to all air spaces,
including those formed by roof windows
and other penetrations. Sitework
Installation sequence a
If the rafters are not sufficiently deep for
1. Fix timber battens to the sides of the b
the required insulation and the cavity,
rafters to keep the insulation at least
their depth may be increased by fixing
50mm below the underlay.
battens to the undersides of the rafters.
Alternatively, a second layer of insulation 2. Cut Ballytherm insulation boards to Abutment
may be fitted across the underside of the size and fit between rafters.
Figure 11
rafters. 3. Fix a second layer of Ballytherm
insulation boards across the
In loft conversions it is often difficult to
underside of the rafters and secure
extend the insulation between the
with battens.
rafters as far as the wall head, also the
4. Tape board joints with Ballytherm c
practicalities of creating usable space
metalised tape.
results in the construction of stud walls
between the joists and rafters. 5. Fit the internal finish to the battens.
Those walls should be insulated with
Ballytherm boards cut to fit between the Points to watch
studs (figure 10). To prevent thermal - Ensure all airspaces beneath the Verge
bridging, the insulation between the underlay are clear and vented. Figure 12
rafters should extend as far as the rear
Pitched Roofs
- Cut Ballytherm boards to fit neatly
face of the stud wall. around penetrations. Seal with
NOTES
a timber battens used as insulation stops
Where a horizontal ceiling is formed expanding foam.
b vertical insulation extended up wall face
beneath the apex of the roof, the ceiling c insulation between inner face of wall
insulation must be fitted tightly between and joist 11
the rafters.Sitework
Ordering, supply and delivery
Ballytherm insulation may be ordered Technical support
through your local builders' merchants
Ballytherm Trading Limited offers
or distributor.
designers and installers a full technical
Ballytherm insulation is supplied in support service to advise them on the
shrink wrapped packs on pallets. best way of utilising Ballytherm
For pack sizes see table 3. insulation in new build and renovation
projects.
Handling and storage The service includes:
Store Ballytherm boards on a level - Technical literature
surface supported on battens. - Copies of reports and certificates
Protect boards from moisture and
- U-value calculations
direct sunlight.
- Condensation risk analysis
Only unpack the quantity of boards - Design advice
required for the day's work. Take care
- Samples
not to knock and damage board edges
- Site visits
and corners.
Working Disclaimer: the information contained in
Ballytherm insulation can be worked this brochure is based on our best
with normal hand tools and may be cut information at the time of issue, however
with a fine tooth saw or craft knife. Ballytherm Trading Limited cannot
Where a large amount of cutting is accept any responsibility for errors or
expected make arrangements for dust any liability out of the use of information
extraction. provided on the material supplied.
Sitework
12References
References
Building regulations - England and • EN 12087: 2013. Thermal insulating
Building regulations - Scotland
Wales: products for building applications.
• Technical handbook - domestic
Determination of long term water
• Approved Document C Site buildings, sections 3 and 6.
absorption by immersion.
preparation and resistance to • Technical handbook - non-domestic
contaminants and moisture. • EN 13165:2012+A2:2016. Thermal
buildings, sections 3 and 6.
insulation products for buildings.
• Approved Document L1A
Standards Factory made rigid polyurethane
Conservation of fuel and power in
foam (PUR) products. Specification.
new dwellings. • BS 5250:2011+A1:2016. Code of
• EN ISO 6946: 2017. Building
• Approved Document L1B practice for control of condensation
components and building elements.
Conservation of fuel and power in in buildings.
Thermal resistance and thermal
existing dwellings. • BS 5534:2014+A2:2018. Code of
transmittance. Calculation method.
• Approved Document L2A practice for slating and tiling
• EN ISO 13370: 2017. Thermal
Conservation of fuel and power in (including shingles).
performance of buildings.
new buildings other than dwellings. • PD 6697:2019. Recommendations for
Heat transfer via the ground.
• Approved Document L2B the design of masonry structures to
Calculation methods.
Conservation of fuel and power in BS EN 1996-1-1 and BS EN 1996-2.
• EN ISO 13788: 2012. Hygrothermal
existing buildings other than • EN 1604:2013. Thermal insulating
performance of building components
dwellings. products for building applications.
and building elements - Internal
Determination of dimensional
Building regulations - Republic of surface temperature to avoid critical
stability under specified temperature
Ireland surface humidity and interstitial
and humidity conditions.
• Technical Guidance Document C - Site condensation - Calculation methods.
Preparation and Resistance to • EN 1991-1-4:2005+A1:2010. Eurocode
Moisture. 1. Actions on structures. General Other guidance
actions. Wind actions.
• Technical Guidance Document L - • BRE Digest 465. U-values for light
Conservation of Fuel and Energy - • EN 1996-2: 2006. Eurocode 6. Design steel-frame construction.
Dwellings. of masonry structures. Design
• BRE 443. Conventions for U-value
considerations, selection of materials
• Technical Guidance Document L - calculations. 2012 edition.
and execution of masonry.
Conservation of Fuel and Energy - • National House Building Council
Buildings other than dwellings. • EN 826: 2013. Thermal insulating
Standards. NHBC.
products for building applications.
Building regulations - Northern Ireland • House building manual 7th edition
Determination of compression
(Homebond). NHBGS.
• Technical booklet C Site preparation behaviour.
and resistance to moisture. • BR 211. Radon: guidance on
• EN 1606: 2013. Thermal insulating
protective measures for new
• Technical booklet F1 Conservation of products for building applications.
buildings. 2015.
fuel and power in dwellings. Determination of compressive creep.
References
• Radon in the workplace. A guide for
• Technical Booklet F2 Conservation of • EN 12086: 2013. Thermal insulating
building owners and managers.
fuel and power in buildings other products for building applications.
(FB 41) BRE. 2011.
than dwellings. Determination of water vapour
transmission properties. 13Ballytherm Trading Ltd.
Annagh Industrial Park
Ballyconnell
Co. Cavan H14 X528
Ireland
Ballytherm (UK) Ltd.
Netherton Road
Overross Industrial Estate
Ross on Wye
Herefordshire HR9 7QQ
Tel: +353 4995 27000
Fax: +353 4995 27002
E-mail: info@ballytherm.ie
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