Afternoon, wonder if you could help?
I was recently inspected by Fire officer and he found two intumescent strips which had paint on them from the painted door frame which he said compromised the effectiveness of the door frame.
I am just curious as to whether those, with better knowledge than I, would agree that the paint negatively affects the integrity of the intumescent strip.
Thanks
Mark
Intumescent strips - Paint
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- billinom8s
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Re: Intumescent strips - Paint
i would guess it depends on what the paint is made from, does it have a low flash point?
how much paint is on the strips?
if it was splashed then he sounds like he is being picky, if it's a sealing brush stroke that will stop the strip expanding and blocking the gaps then he has a good point.
how much paint is on the strips?
if it was splashed then he sounds like he is being picky, if it's a sealing brush stroke that will stop the strip expanding and blocking the gaps then he has a good point.
- Messy
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Re: Intumescent strips - Paint
99% certainly an over enthusiastic Inspecting Officer
Most strips can be overprinted, but not cold smoke seals as they need to flex
What are these doors protecting?
Most strips can be overprinted, but not cold smoke seals as they need to flex
What are these doors protecting?
Re: Intumescent strips - Paint
As previously mentioned it depends on the use of the fire door, and whether cold smoke seals are fitted.
If it were just intumescent strips (without cold smoke seals) then the LABC suggest five coats of paint is acceptable.
https://www.labcwarranty.co.uk/blog/tech-update-painting-over-intumescent-strips/
If there is cold smoke seals, then they need replacing (probably)
If it were just intumescent strips (without cold smoke seals) then the LABC suggest five coats of paint is acceptable.
https://www.labcwarranty.co.uk/blog/tech-update-painting-over-intumescent-strips/
If there is cold smoke seals, then they need replacing (probably)
- witsd
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Re: Intumescent strips - Paint
Last I checked (about 4 years ago) the British Standard said that 'up to five layers of paint' was acceptable.
How you are meant to determine the number of layers, or account for some layers being thicker than others, I have no idea.
Ultimately, the cost of replacing an intumescent strip is pretty low, so if in doubt, it's not a bad recommendation to make.
How you are meant to determine the number of layers, or account for some layers being thicker than others, I have no idea.
Ultimately, the cost of replacing an intumescent strip is pretty low, so if in doubt, it's not a bad recommendation to make.
We often think that when we have completed our study of one we know all about two, because 'two' is 'one and one.' We forget that we still have to make a study of 'and.'
- Messy
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Re: Intumescent strips - Paint
I havent seen that ridiculous statement in the British Standard.
How on earth do you measure a layer of paint?
To be honest , I wouldn't be to bothered about paint, unless it's fire door protecting a single staircase sleeping risk, or a L3 system in a hotel that uses heat detection in bedrooms rather than smoke detection.
How on earth do you measure a layer of paint?
To be honest , I wouldn't be to bothered about paint, unless it's fire door protecting a single staircase sleeping risk, or a L3 system in a hotel that uses heat detection in bedrooms rather than smoke detection.