NON-COM Exterior Fire Retardant Treated Timber
NON-COM Exterior treatment has been used for over 40 years to protect exterior construction timbers against surface spread of flame. It ensures a safe, durable and proven fire retardant protection for homes and public access buildings.
NON-COM Exterior is a Leach Resistant type fire retardant product applied by a carefully controlled high pressure impregnation process followed by kiln drying and heat curing and has independent classification reports across a wide range of timber species and thicknesses, including some modified timbers.
Reasons to choose NON-COM Exterior:
|History of proven performance?||✓|
|Accepted by the National House Building Council (NHBC) Building Control service for exterior timber cladding?||✓|
|Independent classification reports for each timber species, timber thickness, for use with or without air gaps - BS EN 135011-1?||✓|
|Products listed by the UK Wood Protection Association?||✓|
|Can be used for exterior timbers without a protecting coating?||✓|
|Meets current FR durability standards - lasts the lifetime of the building with no maintenance?||✓|
|Applied by an ISO 9001 accredited company?||✓|
|Applied by an ISO 14001 accredited company?||✓|
|Applied to all faces of the timber product?||✓|
|Applied by a controlled impregnation process?||✓|
|From a supplier operating to the UK Wood Protection Association Quality Scheme?||✓|
|Treated with products manufactured by the supplier?||✓|
|Available for a wide range of species?||✓|
|Reduces smoke generation?||✓|
|Non-corrosive to metal fastenings?||✓|
|Does not reduce the strength of the timber?||✓|
|Non-hygroscopic - does not absorb water or rise to efflorescence?||✓|
|Treated products free from surface salt deposits?||✓|
To specify NON-COM Exterior fire retardant treated timber the following wording is recommended...
For specification of external cladding and external structures the following wording is recommended:
The timber as detailed ... (insert species, type, grade, quantity, dimensions) ... is to be used in ... (insert end use description or description of component) and is to be vacuum pressure impregnated with NON-COM Exterior fire retardant and subsequently kiln dried and heat curled in accordance with the NON-COM Exterior manufacturer's specification to meet ... (enter appropriate standard and treatment class) with a fair moisture content on despatch of 13-19%*.
*13-19% is the normal level provided with NON-COM Exterior treatment. Please state if the moisture content needs to be different to this.
For specification of shingles or shakes used in a roof situation the following wording is recommended:
The timber as detailed ... (insert species, type, grade, quantity, dimensions) is to be vacuum pressure impregnated with NON-COM Exterior fire retardant and subsequently kiln dried and heat curled in accordance with the NON-COM Exterior manufacturer's specification in accordance with BS 476: Part 3 AA/P60 rating.
Treated timber which is subsequently rip sawn, equalised, planed or heavily sanded must be returned to the treatment plant for re-treatment.
SPECIES AND THICKNESS
Download the full list of timber species available for NON-COM Exterior fire retardant treatment, all backed with independent Classification Reports.
Details for placing orders and arranging deliveries of NON-COM Exterior fire retardant treated timbers are available direct from Silva Timber Products.
PLEASE NOTE: Because of the safety aspect of fire protection we would recommend that specifiers contact Silva Timber Products directly to ensure you are specifying the correct species, thickness and level of protection.
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