i've just glued some pink fire-proof plasterboard to the new metal beam but have realised i've done it the wrong way round, i've glued the pink side which should be on the outside..
does this matter?
should i rip it down and do it the other way round or is it ok?
Sorry to say this, but. It is one of those materials that is directional. The proofing part is on one side of the boards. The part you have exposed is the part that quenches any heat dissipation from the proofed face. So it needs to be applied the right way round. It will offer protection to the metal, but not as much as it should do.
How it works is. The proofed face protects from direct flame and heat exposure, while the filling material puffs up to cause a wider barrier and dissipate the heat away from the metal. Thus keeping the metal cooler for a lot longer and allowing the fire to be extinguished in a more safe environment.
The way you have it installed, the material that should puff up and create a heat dissipation barrier is on the outside. The heat and flame material is now against the metal it should be protecting, and so will actually pass all the heat is gathers directly to the metal beam.
So you need to pull it out and start again, I'm afraid. Sorry to be the bearer of bad news. :-((
Its not OK. You may be able to stick some more on top the right way around but you need to check with the manufacturer.
Big W writ:
drat - the glue has dried, i should have stayed awake longer last night..
[G]I'll stick another layer on pink side out, that should be ok i hope...
HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.