References

Floors & Screeds

212 sources in the library on floors & screeds. 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 6.

1. supplier figure RN-WYD11B

   Unilin Insulation (formerly Xtratherm)

   Rigid polystyrene board cut from moulded blocks, 2400 x 1200 mm and 1800 x 1200 mm. Thermal conductivity 0.035 W/mK. Compressive strength CS(10Y) 100 kPa. Thickness tolerance class T2. Reaction to fire: Euroclass F. Covered by BBA 24/7224 (2024), with a DoP and an EPD published on the same page.

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2. supplier figure RN-KVHEN8

   Unilin Insulation (formerly Xtratherm)

   Phenolic soffit insulation board with composite foil facings, 2400 x 1200 mm, thicknesses 75, 80, 100 and 120 mm. Thermal conductivity 0.019 W/mK. Compressive strength CS(10Y) 100 kPa. Reaction to fire: Euroclass C-s2, d0. Typical U-values to EN ISO 6946:2017 on a 200 mm concrete soffit: 75 mm 0.25, 80 mm 0.23, 100 mm 0.19, 120 mm 0.16 W/m2K.

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3. supplier figure RN-9MR12L

   Unilin Insulation (formerly Xtratherm)

   Jointed PIR floor board with composite foil facers both sides, 2400 x 1200 mm, thicknesses 75, 100, 125, 140 and 150 mm. Thermal conductivity 0.021 W/mK. Compressive strength 140 kPa. Reaction to fire: Euroclass F. Typical ground supported floor U-values to EN ISO 6946:2017 vary with the perimeter to area ratio; at 75 mm the U-value runs 0.17 W/m2K at P/A 0.30 up to 0.21 W/m2K at P/A 0.80.

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4. supplier figure RN-CMGNLX

   Unilin Insulation (formerly Xtratherm)

   High performance extruded polystyrene board, 1250 x 600 mm, thicknesses 30, 40, 50, 60, 80, 100 and 120 mm. Thermal conductivity 0.033 to 0.035 W/mK. Compressive strength CS(10Y) 500 kPa. Reaction to fire: Euroclass E. Published R-values (m2K/W): 30 mm 0.90, 40 mm 1.20, 50 mm 1.50, 60 mm 1.80, 80 mm 2.25, 100 mm 2.85, 120 mm 3.40.

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5. supplier figure RN-IK7GCU

   Visqueen (British Polythene)

   Black polyethylene damp proof membrane made from a minimum 85% recycled polyethylene. Three thicknesses: 0.25 mm and 0.3 mm both supplied 4 m x 25 m, and 0.5 mm supplied 4 m x 12.5 m. All rolls are multi folded. BBA certified. Visqueen state clearly that this product is NOT accredited for radon applications and direct radon work to Visqueen Ultimate RadonBlok 600 or Radon R400 instead.

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6. supplier figure RN-A3B2LI

   Visqueen (British Polythene)

   Multi-layer reinforced polyethylene gas barrier incorporating a 20 micron aluminium foil, blue on the upper face and silver on the reverse. Supplied in single wound (not folded) rolls, 2 m x 50 m. Compliant with the methane gas transmission rate, mass per unit area and thickness requirements of BS 8485:2015 + A1:2019, and with NHBC Foundation NF94 guidance for Type A membrane locations provided there is no contact with uncured concrete or screed. Also serves as a radon barrier and damp proof membrane. Lap joints can be heat welded or taped depending on specification. BBA certified.

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7. supplier figure RN-EDUON2

   Visqueen (British Polythene)

   Robust co-polymer thermoplastic membrane, 0.5 mm thick, yellow, supplied 4 m x 12.5 m centre folded, which Visqueen say reduces the risk of cracks in screed and limits creases. Lap joints can be taped or heat welded. Sulphate resistant: when installed with heat welded joints it is suitable for DS classifications 1 to 5 under ACEC. BBA certified.

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8. supplier figure RN-ZBQNLC

   Visqueen (British Polythene)

   Black flexible co-polymer thermoplastic damp proof course and cavity tray, 0.8 mm thick, made from thermoplastic polymers with elastomer additives. Visqueen state explicitly that the product does not conform to BS 6515:1984. Supplied in 20 m rolls in widths 100, 112.5, 150, 225, 300, 337.5, 450, 500, 600, 700, 750, 800, 900, 1000, 1200 and 1400 mm. BBA certified, assessed to NHBC Technical Requirement R3. Gas resistant as part of the Visqueen Low Permeability Gas Membrane system to NHBC Amber 1, and used with Visqueen radon membranes for radon protection. System components include the Zedex DPC surface fixing system, HP Tanking Primer 5 L, VisqueenPro detailing strip 300 mm x 10 m, DPC joint support and 100 mm double sided butyl tape 100 mm x 15 m.

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9. supplier figure RN-3IUFF1

   Wunda Group

   Manufacturer figures for wet underfloor heating. Water underfloor heating runs at 35-45C flow against 60-80C for a radiator circuit, which is the reason it suits a heat pump without a temperature penalty. Wunda states wet underfloor heating costs about 60 per cent less to run than electric underfloor heating and is better suited to a larger room or area. On installation effort the manufacturer states 75 m2 could be laid over a weekend by a competent installer. The 35-45C figure is the number to quote whenever a note explains why underfloor heating and heat pumps are paired.

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10. supplier figure RN-KX2RTH

    Wykamol Group

    CM20 is a 20 mm studded HDPE membrane, black, for high water volumes on floors, walls, vaults and tunnels. Unit weight 1 kg/m2, sheet thickness 1 mm, stud height 20 mm. Supplied in 2 m x 20 m and 2 m x 10 m rolls, the latter kept to 20 kg. Water tightness at 60 kPa for 24 h pass to EN 1928, working temperature -50 to +80 C, softening 126 C, tensile strength MD 416 N and CD 488 N, static loading resistance over 20 kg, compressive strength 170 kN/m2, reaction to fire Class E to BS EN 13501-1:2007+A1:2009, Type V, life expectancy the lifetime of the structure. Sheets overlap by three studs and stud-to-stud joints are overlapped by at least two rows. Wykamol note CM20 requires a minimum slope of 10%.

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11. supplier figure RN-KKVM5F

    Wykamol Group

    CM3 Mesh is a 3 mm studded HDPE membrane with a tough HDPE mesh lathing welded to the front face so plaster, adhesive dabs and plasterboard can be applied direct. It delivers a Grade 3 environment to BS 8102:2009 and NHBC Chapter 5.4. Unit weight 0.505 kg/m2, sheet thickness 0.6 mm, stud height 3 mm, clear. Water tightness at 60 kPa for 24 h pass to EN 1928. Working temperature -50 to +80 C, softening 126 C, tensile strength MD 416 N and CD 488 N, static loading resistance over 20 kg, compressive strength 250 kN/m2 (the highest of the Wykamol cavity drain range), reaction to fire Class E, Type V, life expectancy the lifetime of the structure. Plaster finish: a lightweight coat filling the studs and covering the mesh at a minimum 8 mm covering at least 50% of the membrane, then a second coat to a final overall thickness of 15 mm.

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12. supplier figure RN-QIXU2P

    Wykamol Group

    CM8 is an 8 mm studded HDPE cavity drain membrane, clear. Unit weight 0.5 kg/m2, sheet thickness 0.45 mm, stud height 7 mm. Water tightness at 60 kPa for 24 h pass to EN 1928. Working temperature -50 to +80 C, softening temperature 126 C. Tensile strength MD 416 N and CD 488 N to BS 12311-2, resistance to static loading over 20 kg to BS 12730, compressive strength 180 kN/m2 to BS EN ISO 25619-2, reaction to fire Class E to BS EN 13501-1, Type V application, life expectancy the lifetime of the structure. Fixed studs-facing-the-wall with Wykamol plaster or brick plugs, holes drilled through the centre of a stud, stud-to-stud joints sealed with Wykamol Rope. Where a stud frame finish is used, battens are a minimum 25 x 38 mm fixed with No. 10 (5 mm) screws.

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