Insulation & Membranes
273 sources in the library on insulation & membranes. Each one says what the document covers and what it is good for. Name a source to see which document it is and where to read it. One at a time. Page 6 of 7.
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Knauf Insulation
Glass mineral wool roll for timber frame between studwork, ECOSE Technology binder. Declared thermal conductivity 0.032 W/(mK), the best in the FrameTherm range. Reaction to fire A1 to EN 13501-1. Supplied 90 mm x 1140 mm x 4500 mm giving R 2.80 (m2K)/W and 5.13 m2 per roll, and 140 mm x 1140 mm x 2800 mm giving R 4.35 (m2K)/W and 3.19 m2 per roll. Rolls are ready-cut into 2 x 570 mm or 3 x 380 mm widths to friction fit between studs.
- supplier figure RN-0OKH43
Knauf Insulation
The reference figure for standard loft roll. Loft Roll 44 is a glass mineral wool roll for insulating cold pitched roofs at ceiling level, with a thermal conductivity of 0.044 W/mK. It is non-combustible with the best possible Euroclass A1 reaction to fire classification and is made with Knauf's plant-based ECOSE binder. It comes in combi-cut, ready-cut and uncut formats and holds a CCPI Verification Mark, certificate number 000600173/0627, for the entire product set. Its declaration of performance is G4207CPCPR and the Loft Roll 40 and 44 Datasheet dates from July 2025. The 0.044 W/mK figure is what a note should use when converting a required U-value into a loft insulation depth, since it is meaningfully worse than the 0.019 to 0.022 W/mK of rigid boards and so needs greater thickness for the same result.
- supplier figure RN-HJDFIE
Knauf Insulation
Glass mineral wool multi purpose roll for timber and steel frame construction, partially perforated, made with ECOSE Technology. Declared thermal conductivity 0.040 W/(mK). Reaction to fire A1 to EN 13501-1. Supplied 570 mm wide: 100 mm x 6,800 mm giving R 2.25 (m2K)/W and 8.16 m2 per roll; 150 mm x 4,550 mm giving R 3.75 and 5.46 m2; 200 mm x 3,400 mm giving R 5.00 and 4.08 m2.
- supplier figure RN-EG6C8P
Knauf Insulation
Glass mineral wool multi purpose slab, 1200 mm long in 400 mm and 600 mm widths, ECOSE Technology binder. Declared thermal conductivity 0.035 W/(mK). Reaction to fire A1 to EN 13501-1. Published R-values by thickness: 50 mm 1.40, 70 mm 2.00, 75 mm 2.10, 100 mm 2.85, 140 mm 4.00, 150 mm 4.25 (m2K)/W. Holds BBA Agrement certificate 24/7110 for use as insulation between rainscreen facade systems, and a BBA certificate for timber and steel frame construction.
- supplier figure RN-1K74QO
Knauf Insulation
Rock mineral wool slab for external wall insulation systems, 1200 x 600 mm, adhered and mechanically fixed or mechanically fixed only. Declared thermal conductivity 0.036 W/(mK). Reaction to fire A1 to EN 13501-1, which Knauf states removes the need for fire barriers in the system. Thicknesses 60, 90, 100, 120, 150, 170, 200, 230, 250 and 270 mm. BBA Agrement certificate 24/7271.
- supplier figure RN-XAAZ8D
Knauf Insulation
Water repellent rock mineral wool sheathing slab for rainscreen facade systems on buildings of any height, 1200 x 600 mm. Declared thermal conductivity 0.034 W/(mK). Reaction to fire A1 to EN 13501-1. Thicknesses run 50, 60, 70, 75, 80, 90, 100, 110, 120, 125, 130, 140, 150, 160, 165, 170, 180, 190, 200, 210, 220, 230, 240 and 250 mm. BBA Agrement certificate 19/5609.
- supplier figure RN-H0NKXE
Knauf Insulation
Rock mineral wool slab, 1200 x 600 mm, ECOSE Technology binder, for thermal, fire protection and acoustic applications. Declared thermal conductivity 0.035 W/(mK). Reaction to fire A1 to EN 13501-1. Published R-values by thickness: 25 mm 0.70, 30 mm 0.85, 40 mm 1.10, 50 mm 1.40, 60 mm 1.70, 75 mm 2.10, 100 mm 2.85, 150 mm 4.25 (m2K)/W. Optional factory applied foil or tissue facing.
- supplier figure RN-7WQTBY
Knauf Insulation
Glass mineral blowing wool for external full fill masonry cavity walls, injected rather than boarded. Thermal conductivity 0.034 W/mK at the recommended installed density of 25 kg/m3. Non combustible with a Euroclass A1 reaction to fire classification.
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Lignacite
Product data updated 8 January 2026. Expanded clay aggregate block. Face size 440 x 215 mm, thickness 100 mm and 140 mm, mean unit strength 3.6 N/mm2, Group 1 solid, tolerance Category D1. Net dry density 850 kg/m3. Thermal conductivity 0.27 W/mK at 3% moisture, internal use. Reaction to fire Class A1, moisture movement 0.6 mm/m, frost resistance to PD 6697 Table 15. BS EN 771-3, BSI Kitemarked, Category 1. Lignacite direct that a 7.3 N/mm2 block such as Lignacrete Standard is used below ground rather than Fibo 850, and note the low self weight suits partitions built off a floor slab.
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Mannok (formerly Quinn Building Products)
Expanded polystyrene board, lengths 1200, 1800 and 2400 mm, widths 600 and 1200 mm, thicknesses 25 mm to 100 mm as standard. Thermal conductivity 0.036 W/mK. Compressive strength at 10% deformation 100 kPa; bending strength 150 kPa. Water vapour diffusion factor 30 to 70; water vapour permeability 0.010 to 0.024 mg/PaNM. Long term water absorption WL(T)05 by total immersion, less than 1% by partial immersion. Approximate density 20 kg/m3. Fire Classification E.
- supplier figure RN-GJPO5X
Mannok (formerly Quinn Building Products)
Expanded polystyrene board, lengths 1200, 1800 and 2400 mm, widths 600 and 1200 mm, thicknesses 25 mm to 100 mm as standard. Thermal conductivity 0.035 W/mK. Compressive strength at 10% deformation 150 kPa; bending strength 200 kPa. Water vapour diffusion factor 40 to 100; permeability 0.007 to 0.018 mg/PaNM. Long term water absorption WL(T)05 total immersion, less than 1% partial immersion. Approximate density 25 kg/m3. Fire Classification E. Certified by IAB and BBA for use in underfloor heating systems.
- supplier figure RN-0GFGNQ
Mannok (formerly Quinn Building Products)
Expanded polystyrene board, lengths 1200, 1800 and 2400 mm, widths 600 and 1200 mm, thicknesses 25 mm to 100 mm as standard. Thermal conductivity 0.034 W/mK. Compressive strength at 10% deformation 200 kPa; bending strength 250 kPa. Water vapour diffusion factor 40 to 100; permeability 0.007 to 0.018 mg/PaNM. Approximate density 30 kg/m3. Fire Classification E.
- supplier figure RN-UTVV6P
Mannok (formerly Quinn Building Products)
Expanded polystyrene board, lengths 1200, 1800 and 2400 mm, widths 600 and 1200 mm, thicknesses 25 mm to 100 mm as standard. Thermal conductivity 0.038 W/mK. Compressive strength at 10% deformation 70 kPa; bending strength 115 kPa. Dimensional stability DS(N)5 length, DS(N)2 width. Water vapour diffusion factor 20 to 40; water vapour permeability 0.018 to 0.036 mg/PaNM. Long term water absorption WL(T)05 by total immersion (less than 5%), less than 1% by partial immersion. Approximate density 15 kg/m3. Fire Classification E.
- supplier figure RN-PXZNRD
Mannok (formerly Quinn Building Products)
Full fill PIR cavity board with low emissivity foil facers and tongue and groove edges, 1200 x 450 mm, thicknesses 90, 115 and 140 mm. Thermal conductivity 0.022 W/mK. Core water vapour resistivity approximately 300 MNs/gm. Compressive strength greater than 140 kPa. A published EPD is available.
- supplier figure RN-VT6N1D
Mannok (formerly Quinn Building Products)
Foil faced rigid PIR partial fill cavity board, 1200 x 450 mm, sized to co-ordinate with standard wall tie spacings, with butt or tongue and groove edges. Thicknesses 25 mm to 110 mm. Thermal conductivity (lambda) 0.022 W/mK. Core water vapour resistivity approximately 300 MNs/gm. Compressive strength greater than 140 kPa. The page does not state a Euroclass reaction to fire classification.
- supplier figure RN-A7HM8U
Mannok (formerly Quinn Building Products)
Foil faced rigid PIR floor board, 2400 x 1200 mm, thicknesses 20 mm to 200 mm. Thermal conductivity (lambda) 0.022 W/mK. Core water vapour resistivity approximately 300 MNs/gm. Compressive strength greater than 140 kPa. Certified under BBA certificate 07/4444 and IAB certificate 05/0223. The page does not state a Euroclass reaction to fire classification.
- supplier figure RN-I5B42V
Mannok (formerly Quinn Building Products)
Thermal laminate with plasterboard on the outer face and a composite foil facing on the inner face, boards 2400 x 1200 mm, overall thicknesses 27.5 mm to 92.5 mm. Thermal conductivity (lambda) 0.022 W/mK. Core water vapour resistivity approximately 300 MNs/gm. Compressive strength greater than 140 kPa. Certified under BBA certificate 07/4444 and IAB certificate 05/0223.
- supplier figure RN-CHO4HW
Mannok (formerly Quinn Building Products)
Foil faced rigid PIR roof board, 2400 x 1200 mm, thicknesses 20 mm to 200 mm. Thermal conductivity (lambda) 0.022 W/mK. Core water vapour resistivity approximately 300 MNs/gm. Compressive strength greater than 140 kPa. Certified under BBA certificate 07/4444 and IAB certificate 05/0223. Listed applications cover above rafters, above and between rafters, between and below rafters, at ceiling level, loft or attic walls, and cold deck flat roofs. The page does not state a Euroclass reaction to fire classification.
- supplier figure RN-43CDO1
Marley Ltd
Marley Universal Vapour Permeable roof underlay: weight 170 gsm (-10%/+10%), water vapour transmission Sd 0.029 m (+/-0.01), resistance to water penetration Class W1 before and after artificial ageing, reaction to fire Class E to EN 11925-2, flexibility at low temperature -60 degrees C. Tensile strength 400 N/50mm longitudinal and 260 N/50mm transverse (380 N/50mm longitudinal after ageing); elongation 80% longitudinal, 100% transverse; tear resistance 190 N in both directions. Supported batten gauge under 250mm and under 345mm in wind Zones 1-5. CE marked, BBA and IBA approved.
- supplier figure RN-98ASBK
PermaRock Products Ltd
Graphite loaded, flame retardant additive grade expanded polystyrene board for external wall insulation, to EN 13163. Standard dimensions 1200 x 600 mm, standard thicknesses 20 to 300 mm in 10 mm increments. Density about 16 kg/m3. Declared thermal conductivity 0.030 W/mK to EN 13163. Water vapour permeability 0.009 to 0.020 mg/(Pa.h.m). Fire behaviour B-s1,d0 or B-s2,d0 to EN 13501-1 depending on the finish used. The PermaRock EPS Premium system can be used on buildings up to 18 m in height. Zero ozone depletion potential, Green Guide A+.
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PermaRock Products Ltd
Non combustible mineral fibre EWI boards to BS EN 13162: 2012+A1:2015, supplied in Dual Density (DD), High Density (HD) and Mono Density (MD1 and MD2) types. Reaction to Fire Euroclass A1 for all insulation types to BS EN 13501-1. Board size 1200 x 600 mm for all types. Thickness ranges in 10 mm increments: DD 50 to 250 mm, HD 30 to 40 mm, MD1 30 to 250 mm, MD2 50 to 250 mm. Declared thermal conductivity: DD 0.036, HD 0.038, MD1 0.035, MD2 0.036 W/mK. Compressive strength at least 10 kPa for DD and HD, at least 10 kPa (MD1 at 50-90 and 210-250 mm) or at least 30 kPa (MD1 at other thicknesses and MD2). Tensile strength at least 10 kPa (DD, MD1, MD2) and at least 15 kPa (HD). Third party accreditation under Kiwa BDA Agrement Certificates BAW-24-331-S-A-UK, BAW-24-332-S-A-UK and BAW-25-403-S-A-UK.
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Plasmor
Aglite Ultima, low density loadbearing block from Plasmor's own expanded clay plus lightweight aggregates. Strengths and densities: 4.2 N/mm2 at 1050 kg/m3, 7.3 N/mm2 at 1050 kg/m3, 10.4 N/mm2 at 1150 kg/m3. Thermal conductivity K 0.31 W/mK at 4.2 N and 7.3 N, 0.36 W/mK at 10.4 N. Available 100 mm at 4.2, 7.3 and 10.4 N/mm2 and 140 mm at 7.3 and 10.4 N/mm2. Work size 440 x width x 215 mm, coordinating size 450 x width x 225 mm. Pack coverage 9.6 m2 at 100 mm, 6.4 m2 at 140 mm. The 100 mm block is an 11.5 kg one hand lift. Below DPC use is limited to the 7.3 N grade. Complies with Part L, Part E and Robust Details E-WM-12, E-WM-17, E-WM-34 and E-FC-4.
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Plasmor
Fibolite, ultra lightweight loadbearing block made from Plasmor expanded clay nodules produced in a rotary kiln, with a vitrified outer shell and honeycombed core. Strengths and densities: 3.6 N/mm2 at 850 kg/m3 and 7.3 N/mm2 at 950 kg/m3. Thermal conductivity K 0.24 W/mK at 3.6 N and 0.28 W/mK at 7.3 N, the lowest lambda of the Plasmor aggregate block ranges. Sizes: 100 mm and 140 mm in both 3.6 and 7.3 N, 190 mm in 3.6 N, 215 mm in 7.3 N. Work size 440 x width x 215 mm, coordinating 450 x width x 225 mm, solid. Most of the range meets the 20 kg single lift limit under CDM. Suitable for walls below DPC.
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Recticel Insulation
General purpose PIR board, 2400 x 1200 mm, straight edges. Lambda 0.022 W/mK. Compressive strength greater than or equal to 120 kPa. Fire behaviour: Euroclass F. Published thermal resistance by thickness (m2K/W): 25 mm 1.10, 30 mm 1.35, 40 mm 1.80, 50 mm 2.25, 60 mm 2.70, 70 mm 3.15, 75 mm 3.40, 80 mm 3.60, 90 mm 4.05, 100 mm 4.50, 110 mm 5.00, 120 mm 5.45, 130 mm 5.90, 140 mm 6.35, 150 mm 6.80, 160 mm 7.25. BBA certificate for Eurothane GP underfloor is listed with the downloads.
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Recticel Insulation
PIR thermal laminate, 2400 x 1200 mm, straight edges. Lambda 0.022 W/mK. Fire behaviour: Euroclass B s1 d0 according to EN 13950:2014. Published thermal resistance by insulation thickness (m2K/W): 25 mm 1.10, 40 mm 1.80, 50 mm 2.25, 60 mm 2.70, 65 mm 2.95. A BBA certificate for the Eurothane PL dry lining system and a DoP are published on the same page.
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ROCKWOOL
The manufacturer's filterable product listing for stone wool insulation, showing a thermal conductivity range of 0.032 to 0.044 W/mK across the range, which is the figure to set against the 0.019 to 0.022 W/mK of rigid phenolic and PIR boards when a note compares mineral wool with rigid board. Products listed include Flexi, described as a non-combustible multi-use dual purpose acoustic and thermal stone wool insulation slab, Full Fill Cavity Batt described as semi-rigid and non-combustible, HardRock Multi-Fix (DD) dual-density roofing insulation board with acoustic and fire resistance, Soffit Slab for concrete soffits, Acoustic Infills for metal roof decks, and the FirePro range of firestopping products. Use it for the non-combustibility and acoustic claims, and check an individual product data sheet for the exact lambda of the item being specified.
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ROCKWOOL UK
Non combustible dual purpose acoustic and thermal stone wool slab with a flexible edge on one side, made to EN 13162:2012+A1:2015. Declared thermal conductivity 0.038 W/mK at 50 to 120 mm and 0.035 W/mK at 140 mm and above. Reaction to fire Euroclass A1 in accordance with BS EN 13501-1: 2018. Density exceeds 10 kg/m3 in accordance with Approved Document E. Available thicknesses 50, 60, 70, 90, 100, 120, 140 and 180 mm. Long and short term water absorption declared NPD.
- supplier figure RN-I45CWE
ROCKWOOL UK
Semi rigid stone wool batt for external masonry cavity walls and for masonry party walls between dwellings, to EN 13162:2012+A1:2015. Declared thermal conductivity 0.037 W/mK. Reaction to fire Euroclass A1 in accordance with EN 13501-1:2018. BBA Certificate No. 94/3079. Long term water absorption WL(P), short term WS. ROCKWOOL notes that other than in very severe exposure locations with fair faced masonry, the NHBC accepts its use under NHBC Standards Chapter 6.1.
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ROCKWOOL UK
Dual density stone wool flat roof board to EN 13162:2012+A1:2015. Declared thermal conductivity 0.039 W/mK. Compressive strength CS(10)70, that is 70 kPa. Reaction to fire Euroclass A2-s1,d0 in accordance with BS EN 13501-1:2018. Long term water absorption WL(P), short term WS.
- supplier figure RN-5A32QB
ROCKWOOL UK
Stone wool full fill cavity slab made with NyRock patented fibre technology, to EN 13162:2012+A1:2015. Declared thermal conductivity 0.032 W/mK, better than the standard ROCKWOOL Full Fill Cavity Batt at 0.037. Reaction to fire Euroclass A1 in accordance with BS EN 13501-1: 2018. BBA Certificate No. 22/6252. Long term water absorption WL(P), short term WS. Designed to friction fit against blockwork.
- supplier figure RN-VOT81R
ROCKWOOL UK
Stone wool frame slab made with NyRock patented fibre technology, described by ROCKWOOL as the lowest lambda stone wool insulation currently available in the UK and Ireland. Declared thermal conductivity 0.032 W/mK, product standard EN 13162:2012+A1:2015. Reaction to fire Euroclass A1 in accordance with BS EN 13501-1: 2018. Long term water absorption WL(P), short term WS.
- supplier figure RN-8LYXQE
ROCKWOOL UK
Dual density water repellent stone wool slab for steel frame, timber frame or masonry walls behind cladding, to EN 13162:2012+A1:2015. Thermal conductivity 0.034 W/mK at 50 to 80 mm and 0.035 W/mK at 90 to 230 mm. Reaction to fire Euroclass A1 in accordance with BS EN 13501-1: 2018. BBA Certificate No. 17/5402, CE certificate 0751-CPR-393.0-01, DoP number RWUK-CE-0031-05, CCPI assessment 011100185/1127. Facings available: none, aluminium foil, or glass tissue in black, neutral or white. The outer surface is a higher density than the underside to take fixings.
- supplier figure RN-4YI68H
ROCKWOOL UK
Stone wool loft roll pre-cut to widths of 3 x 400 mm or 2 x 600 mm, supplied in thicknesses of 100 mm and 150 mm on pallets under a waterproof covering. Declared thermal conductivity 0.044 W/mK, product standard EN 13162:2012+A1:2015. Reaction to fire Euroclass A1 in accordance with BS EN 13501-1: 2018. Water absorption declared NPD.
- supplier figure RN-8KWNIM
ROCKWOOL UK
Stone wool slab available in a range of thicknesses with specialist facings on request, to EN 13162:2012+A1:2015. Declared thermal conductivity 0.034 W/mK. Reaction to fire Euroclass A1 in accordance with BS EN 13501-1: 2018. Water absorption declared NPD.
- supplier figure RN-TJA6MC
ROCKWOOL UK
Stone wool slab to EN 13162:2012+A1:2015. Declared thermal conductivity 0.035 W/mK in the properties table, with the product summary quoting 0.034 W/mK. Density exceeds 10 kg/m3 in accordance with Approved Document E. Reaction to fire Euroclass A1 in accordance with BS EN 13501-1: 2018.
- supplier figure RN-I72L8T
ROCKWOOL UK
Non combustible stone wool thermal insulation for concrete soffits, capable of providing up to 4 hours of fire protection, available with optional aluminium foil and tissue facings. Declared thermal conductivity 0.034 W/mK, product standard EN 13162:2012+A1:2015. Soffit Slab has been classified A1 in accordance with BS EN 13501-1: 2018, and is classified for fire resistance in accordance with BS EN 13501-2: 2023. The Hi Impact Soffit Slab variant with a bonded 6 mm fibre cement board is classified A2-s1, d0 in accordance with BS EN 13501-1:2018.
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Siniat
Manufacturer datasheet for insulated plasterboard, EPS bonded to 9.5mm plasterboard with PVA adhesive. Thermal conductivity is 0.037 W/mK for the EPS and 0.19 W/mK for the plasterboard, giving total thermal resistance of 0.37 m2K/W at 22mm overall, 0.62 at 30mm, 0.89 at 40mm and 1.16 m2K/W at 50mm. That is the crucial number for internal wall insulation: even a 50mm laminate adds only 1.16 m2K/W, so a solid brick wall lined with it will still be far from a modern U-value. Sheet weight is 18.1 kg at 22mm, 18.4 kg at 30mm, 18.7 kg at 40mm and 19.0 kg at 50mm for a 2400 x 1200mm board, so the extra insulation adds almost no weight. Vapour resistance is 2.31 MNs/g at 22mm and 3.47 MNs/g at 30mm. The laminate complies with BS EN 13950:2014 and the ozone depleting potential is 0. The core and papers are made from recycled waste paper bonded with starch, edge glued with PVA.
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SOPREMA UK (Celotex)
Partial fill cavity wall PIR board with aluminium foil facings, boards 1200 x 450 mm. Declared thermal conductivity (lambda D) 0.022 W/mK. Thickness range 40 mm to 100 mm. Compressive strength 120 kPa. BBA Certificate 25/7312 covers partial fill cavity walls. Fire: SOPRATHERM CW4000 achieves a reaction to fire classification of Euroclass F in accordance with BS EN 13501-1.
- supplier figure RN-5EVKJ2
SOPREMA UK (Celotex)
PIR insulation board with aluminium foil facings on both sides, boards 2400 x 1200 mm. Declared thermal conductivity (lambda D) 0.022 W/mK. Thickness range 50 mm to 100 mm. Compressive strength 140 kPa. BBA Certificate 25/7318 covers pitched roof, dry lining and floor insulation. Fire: SOPRATHERM GA4000 achieves a reaction to fire classification of Euroclass F in accordance with BS EN 13501-1.
- supplier figure RN-788O31
SOPREMA UK (Celotex)
Thin PIR insulation board with aluminium foil facings, boards 2400 x 1200 mm. Declared thermal conductivity (lambda D) 0.022 W/mK. Thickness range 20 mm to 40 mm. Compressive strength 120 kPa. BBA Certificate 25/7318 covers pitched roof, dry lining and floor insulation. Fire: SOPRATHERM TB4000 achieves a reaction to fire classification of Euroclass F in accordance with BS EN 13501-1.