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IsoBoard Installation:
Under Soffit Ceilings
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Under Soffit Ceilings.
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IsoBoard Under Soffit Ceilings
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Where construction, design and / or cost implications prohibit the installation of an inverted roof insulation system, the requirement for insulation is met by fixing IsoBoard to the under soffit surface of the slab as a ceiling.
Used in Residential and Commercial applications to provide insulation where an inverted roof insulation system may not be appropriate.
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"ISOBoard® high density 32-36kg/m3 rigid extruded polystyrene 100% closed cell insulation board of .... mm thickness and 600mm width, fixed using washers and plastic plugs at 300mm centres through pre-drilled holes to underside of smooth concrete soffit (fixed to levelling brandering if required)."
Store boards flat within original packaging until required.
Boards are to be protected from adverse weather conditions and direct sunlight for the storage period.
Handle and install with care to prevent damage to board edges and exposed surfaces.
Wipe boards with cloth and softened water solution to clean as necessary.
Please contact IsoBoard for any queries with respect to the above.
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Application Guide
Drill fixing holes at 300mm centre spacings into soffit. Fix IsoBoard using plastic washers and plugs (Hilti or equivalent).
In the case where the board is placed as the top of a service duct, IsoBoard is installed in panels not exceeding 1,5 square metres in area, with a minimum 25mm spacing between adjacent panels (see fire report).
Where applicable, suspended ceiling fixings can be effected through the IsoBoard.
Provide a level surface to attach the board to, such as brandering, if an aesthetically acceptable finish is required.
The full text of the Below Soffit In Service Duct Fire Test as conducted by the CSIR Building Technology unit with respect to this installation method, report no. BF 502/089-5600-5664, is available on the IsoBoard website.
Use boards between 1.2m and 3m long profiled all round to allow for alignment and tolerances experienced in the product.
IsoBoard is readily cut to length on site using a sharp blade or hack-saw, or can be supplied cut-to-length by the Regional Distribution Centres.
Where IsoBoard is to be installed under soffit above a service duct, the boards should be ordered in maximum 1200mm lengths, with two installed adjacent to one another to form the required panel size.
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