Fire sealant for back of distribution board?

[LewisM]

Anybody recommend a good intumescent sealant that can be applied directly to PVC cables?

 

[Midwest]

The plasterboard is fixed to the I joists to form the ceiling , that’s it, lam beams etc do not get covered in plasterboard

I think you might be wrong. Standard plasterboard, is also used (in a design) to provide an acoustic & moisture barrier and provide some thermal performance.

I'll be doing some alterations in my property in due course. I'll ask the building inspector.

 

[Ian1981]

I think you might be wrong. Standard plasterboard, is also used (in a design) to provide an acoustic & moisture barrier and provide some thermal performance.

I'll be doing some alterations in my property in due course. I'll ask the building inspector.

Only going by what I witness on a weekly basis.
non of the new build housing do this, the only time I see it is on commercial steel construction buildings that have double boarded or pink boarded the steel support beams and some care homes we have done and still do, which have multiple fire compartments within the building.
Im no expert tho , I’ll hold my hands up.

acoustic boards are blue Coloured boards

 

[Baddegg]

9.5mm on the ceilings gives you 30 min fire protection barrier that’s all that’s required in regs the same as a fire door, steels need double boarding......although down here these days the focus is more on linked smokes and heats and if placed in every room (not bathrooms) you can even omit fire doors....

 

[Midwest]

Only going by what I witness on a weekly basis.
non of the new build housing do this, the only time I see it is on commercial steel construction buildings that have double boarded or pink boarded the steel support beams and some care homes we have done and still do, which have multiple fire compartments within the building.
Im no expert tho , I’ll hold my hands up

acoustic boards are blue Coloured boards

It depends on the design. For example standard plaster can be used as a design for Part E2, for interior walls and floors. Soundbloc (blue coloured) would be even better, but it’s more expensive and probably is not required to meet the acoustic test.

 

[Mike Johnson]

We have come a long way from the original OP's question, but I think the conclusion may be, if the DB is only cut out at the rear and the cables are surface mounted on the wall directly behind then fire sealing is not required, if on the other hand the cables are in a penetration through the wall if may need fire sealing, if you fire seal it you can't be wrong.

 

[Midwest]

We have come a long way from the original OP's question, but I think the conclusion may be, if the DB is only cut out at the rear and the cables are surface mounted on the wall directly behind then fire sealing is not required, if on the other hand the cables are in a penetration through the wall if may need fire sealing, if you fire seal it you can't be wrong.

Not according to the IET, depending if there’s an r in the month or not.

 

[Mike Johnson]

So would have to do all those DB changes in May, June, July & August only I suppose only working four months a year has its benefits.

 

[BruceBanner]

I wondered about this & didn't like the idea of all the intumescent Sealant in the hole, started to fit the intumescent pads that go in 2gang boxes to the cable entry point. Much better & about a £1 time. Meets all the regs.

 

[Midwest]

I wondered about this & didn't like the idea of all the intumescent Sealant in the hole, started to fit the intumescent pads that go in 2gang boxes to the cable entry point. Much better & about a £1 time. Meets all the regs.

Ehh? Three word thing.

 

[davesparks]

I wondered about this & didn't like the idea of all the intumescent Sealant in the hole, started to fit the intumescent pads that go in 2gang boxes to the cable entry point. Much better & about a £1 time. Meets all the regs.

Does it meet the regs? Will the pad expand enough to fill the enclosure as it is designed to do with a socket, or will it just expand and fall to the bottom of the CU enclosure?