XtrathermThin-R CT/PIR Cavity Therm Full Fill Insulation - 150mm (pack of 4)
Cavity Therm Full Fill Insulation
PIR Insulation Board
1200mm x 450mm
2-3 Working Days
150mm Thin-R CT/PIR Cavity Therm Full Fill Insulation Xtratherm (pack of 4)
CavityTherm is an innovative built-in insulation for traditional walls that achieves passive level U-Values as low as 0.12 W/m2K with excellent thermal bridging detailing in cavities less than 150mm wide.
CavityTherm has gas tight facings with one face bonded to a profiled HIPS skin during manufacture to provide a drainage plane.
Avaiable Thickness: 75/90/100/125/150mm
Pack Coverage: 2.16m2
Thermal Conductivity: 0.021W/mK
Compressive Strength: 100kPa
Water vapour resistivity: 100
Service Temperature : -20 to +100 (°C)
Engineered HIPs facer provides wind driven rain protection
Moisture redirected to outer surface
Prepositioned slots for sloping wall ties - no creep
Fully engineered jointing
Full range of accessory pieces build continuous system
Excellent Thermal Bridging Values
CavityTherm provides a ‘system’ that delivers on U-values, is practical, and with a full range of innovative detailing accessories – it delivers on continuity.
What is CavityTherm?
Xtratherm CavityTherm wall insulation board is a high performance composite board of PIR core with a lambda
value of 0.021 W/mK. The boards have gas tight facings with one face bonded to a profiled HIPS skin during manufacture
to provide a drainage plane. CavityTherm’s unique profiled facing directs any moisture that might have penetrated the
external wall down the protective facing and back onto the external leaf. The board includes specifically designed rebated
edge detailing on all four edges to allow the system to tightly interlock when installed.
What is the real benefit using CavityTherm?
Put simply, the U-values achieved by placing CavityTherm into your standard 150mm cavity meets the Passive House
standards for Ireland. It builds as a ‘system to ensure continuity. You can physically see that the procedures
on site are being followed. It’s a very practical, affordable solution to low energy design.
Why slope the wall ties down to the outer face?
This is not specific to CavityTherm, all wall ties in any construction should slope slightly down to prevent water
travelling along the wall ties into the construction. Wall ties must be kept clean and free of mortar.
What building types can use CavityTherm?
CavityTherm can be used in new external masonry cavity walls up to 25m in height in domestic and non-domestic buildings.
CavityTherm has a lot of accessories as part of the ‘system’, what are they for?
An excellent wall U-value is not the only item that must be addressed to achieve a Low Carbon Fabric.
Airtightness and thermal bridging must also be improved.
Thermal Bridging is in fact just ‘good detailing’ and is accounted for in SAP. Xtratherm is the only insulation
board manufacturer that addresses gaps or breaks within the continuity of the insulation layer. How do you detail insulation around stepped cavity trays, periscope vents in suspended floors or at corners, or meter boxes? Xtratherm has developed bespoke insulated pieces to ensure that these details are well insulated so as to avoid thermal bridging and possible condensation mould growth.
Is there a benefit in the ‘Engineered edge detail’?
The Building Regulations now ask that insulation systems be ‘continuous’ and are installed in accordance with
accredited detailing. The jointing system in Xtratherm products achieves this, encourages a more accurate build, and avoids the 0.01 U-value penalty that should be applied when calculating to BR443.
You recommend the use of a ‘Cavity Board’ – what is that?
The use of a cavity board is recommended during construction. It is a board that is placed over the installed
boards as the inner leaf is raised to catch any mortar drops that might fall. If mortar does fall onto the upper edge of the CavityTherm the HIPS skin is easily cleaned with a damp cloth.
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