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Posted By Phil H
Could anyone tell me if it is acceptable to paint or varnish Intumescent strips on and around fire doors. I know the brush type shouldn't be painted but I am coming across more that have the smooth finish plastic strips which are being painted over. Any knowledge out there would be appreciated
Phil
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Posted By Dave Wilson
Would have thought that you are interfering with its intended design and should not do this! however not a expert in this just an opinion.
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Posted By Alex Ryding
Not sure what the law is, but our fire engineer was quite upset when he found a painted one a few years back - so we ensure that they're not painted.
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Posted By Ron Hunter I found this link quite informative. Seems that there is no hard and fast rule. Although highly flammable paint finishes should obvioulsy be avoided, a thin layer of paint won't stop the strip expanding and doing its job at 150-200 degrees c. http://www.norfolkfirese...uploaded_files/fsss5.pdf
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Posted By shaun mckeever The answer is no. To be honest I'm not sure of the technical reasons but I have had many dealings with Sealmaster who are one of the manufacturers of these types of products and they have advised me that painting them affects their ability to work correctly. I'm sure you can contatc them directly and they will be able to help you. Follow this link:- http://www.sealmaster.co.uk/
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Posted By Mark Ellis
Hi Phil, just completed a site which included three different housing associations , one block of 16 town houses all had the intumescent strips painted/glossed , the h/a clerk was perfectly happy with this and saw no cause for concern.
however the other h/a representatives made it quite clear they must not be painted in their opinion.
personally i don't think it makes any difference, it will not compromise the properties whatsoever and is purely cosmetic.
manufactures however are of differing opinions..Mark.
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Posted By Phil H
Thanks for your responses, much appreciated
Phil
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Posted By Makka
The answer is no, admittedly a thin coat of paint of varnish may not prevent operation, but the solvent in that paint or varnish may well damage the material that the strip is made from altering its operative properties.
Additionally there is the potential for a faster spread of the fire as it flashes past the intumescent strip to the other side of the door.
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