Floor fire resistance

[Lewism3]

Can someone explain the modified 30 minute standard of fire protection?

I know it applies to one storey conversions, no more than 2 habitable rooms and/or a total area not exceeding 50m squared.

How does it differ from the standard 30 min protection?

Martin

 

[noseall]

well all i know is, you're wiser than me.

 

[mattysupra]

um. um. um. um. you know what... you have got me on this one! i didn't know about this on flooring. When you state floor do you mean floor covering? Are you on about doors? Dont know about that either so any advice will help! anyone ...please....

 

[gcol]

Give your local Building control department a call and ask them.

 

[Lewism3]

I'm relating this to loft conversions and the fire resistance of the new floor and/or wall partitions.

In some cases a modified 30 minute standard is used. I think its something to do with the structure being able to resist the standard 30 minute test, but concessions made for various insulation materials etc....

Just wondered what the Pro's stance of this matter was, as I'm a bit confused!!!!


Martin

 

[gcol]

I would suggest it's quite important that you get it right, so I'd say (again) that you contact the Building Control Office rather than go off what someone said on a forum.

 

[markie]

I'm not sure what your getting at, but in an loft conv the floor/ ceiling of new has to be 1/2 fire proof which by regs is either up-grade exsisting ceilings with 1/2" plaster board and skim ( thats if the ceilings are laths/plaster ) or if the ceilings are L/P you can/have to chicken wire the exsisting ceiling joists/rafters to form a basket then put fire proof slabs of insluation ( used to be called RW2 rock-wool slabs ) now 33 something. in between ceiling joists, some are happy with just doing the eves only and useing the chicken wire on the new floor joists as long as you do the eves and under the steel/trimmers what ever the case maybe.

But thats up here so it's best to ask your B.C.D, like gcol said because it diff from one place to the nexted so it seems