Selecting Your Fire Impregnation Treatment
1. What is the difference between DRICON and ATP Generic fire retardant treatments?
DRICON is a water based, INT2, Humidity Resistant type formulation that is applied by Lonza Wood Protection at our own treatment facility at Castleford under controlled conditions in a high pressure impregnation plant, commonly followed by kiln drying to return the timber to an acceptable or specified moisture content.
DRICON treated timbers/sheet materials are suitable for:
all interior applications.
Typical end uses for DRICON treated material would be internal building timbers and lining material, internal timber cladding, internal staircases, scaffold boards, rail and transport industry projects.
ATP Generic is a water based INT1 dry interior fire retardant type formulation that is applied by Lonza Wood Protection at our own treatment facility at Castleford under controlled conditions in a high pressure impregnation plant, commonly followed by kiln drying t return the timber to an cceptable or specified moisture content.
ATP Generic treated timber and plywood is suitable for:
all dry interior applications.
Typical end uses for ATP Generic treated material would be temporary exhibition displays, shop fitting projects and some Ministry of Defence works.
2. What accreditations does DRICON hold?
Quality accredited through the UK Wood Protection Association FR Benchmark certification scheme
Fully tested by Warringtonfire with independent Euroclass Classification Reports for each timber species and timber thickness, for use with or without air gaps - EN 13501-1.
Fully approved for use in London Underground - meets the requirements of London Underground Standard 1-085 'Fire Safety performance of Materials'.
Certification of the fire retardant treated timber as a Sustainable Building Material by the Dutch Institute of Building Biology and Building Ecology.
Independently assessed by Chiltern International Fire in the 6 storey timber frame TF2000 (Staircase 2001) study and found to satisfy the functional fire safety requirements of the UK Building Regulations.
Recommended by the National Access & Scaffolding Confederation for the treatment of scaffold boards.
4. What accreditations does ATP Generic hold?
- ATP Generic is a Wood Protection Association INT1, dry interior type formulation.
- ATP Generic is approved for use by the Ministry of Defence
5. What is the difference between WPA 'Listed' status and WPA 'Approved' status treatments?
Both DRICON and ATP Generic treatments hold WPA 'Approved' Status.
WPA criteria to achieve a 'Listed' status are far less stringent than those for 'Approved' status.
WPA criteria to achieve 'Listed' status:
Manufacturers declaration ONLY of the hygroscopic and leach resistance (where applicable) nature of the FR product.
No third party evaluation of fire data required - fire certification is the only way a manufacturer can demonstrate that the relevant fire testing has been done by species but no certification whatsoever is assessed to achieve 'Listed' status.
No third party evaluation of other ancillary properties required.
WPA criteria to achieve 'Approved' status:
- Independent panel approval, with rigorous assessment of:
- fire performance and classification reports, including smoke
- leach resistance (where applicable)
- key ancillary properties such as corrosion, strength, preservation properties
Why choose a WPA 'Listed' fire treatment when you can have the assurance that goes with selecting WPA 'Approved' fire treatment?
6. What timbers can be treated with DRICON and ATP Generic?
DRICON - We hold an extensive portfolio of DRICON certification for plywoods and solid timbers. Typical plywood species include birch and spruce and solid timbers include typical softwoods through to more unusual species.
Download our treatable species guide for more information.
Please give us a call to discuss your project requirements.
ATP Generic - Please contact Lonza directly for advice on treatable timbers and species.
7. Does DRICON or ATP Generic treatment alter the appearance of fire treated timber / plywood?
As a general rule:
DRICON treated timber looks slightly lighter than un-treated timber but will weather down the same as un-treated timber.
Some species have their own specific treatment characteristics. Please contact us to discuss your requirements in more detail.
ATP Generic treated timber looks largely unaffected compared to un-treated timber.
A few residual salts may be visible on the faces and edges that may need to be removed with a light sand or wipe over prior to installation.
8. How do fire retardant treatment impregnation treatments work?
The impregnated fire treatment lives passively in the timber until a fire strikes.
When untreated timber burns the natural volatile tars & gases present in timber combust which generates a high level of heat & smoke emission resulting in a high rate of fire growth & a degree of char formation.
A fire retardant treatment modifies the nature of the burning process.
The heat from the fire causes rapid dehydration of the timber. This water dilutes & cools the volatile gases which in turn reduces the rate of fire growth & heat emission.
There is also a high level of char formation which is insulating & contributes to the reduced rate of fire growth.
9. Can Lonza fire retardant treatments be applied to timber for use on Rail and London Underground projects?
Yes, DRICON is fully approved for use in London Underground - meeting the requirements of London Underground Standard 1-085 'Fire Safety performance of Materials'. Treatments are to Euroclass B in accordance with EN 13501-1.
Birch plywood intended for flooring in rolling stock can be treated to either EN 45545-2 or to Class 1 BS476-7.
We would recommend you contact Lonza directly to discuss species specific certification details prior to specification.