Loft insulation

silvercar

Mikeyorks wrote: »

.... fortunately we only have an inch of that as a base. It's so disgusting that even the fieldmice that come in won't touch it. It's some sort of mica ... and just brushing it to one side to do some wiring ... makes your chest tight (must send the OH up there - she's getting a bit droopy in that area ) and a mask is essential. So I trust someone else is doing all the work

:rotfl: :rotfl:

One of these companies that the grant people use is doing all the work, I don't think they are using the mica but laying out stuff on top of it.

smartpicture

missile wrote: »

Perhaps you could explain this a bit better?

In normal house construction, the roof joists hold up the ceiling plasterboard. Perhaps what you are seeing is the ceiling bulging down between the joists?

Whatever the cause, this is not normal and I would be concerned.

What I mean is, if I'm standing in the bedroom and look up at the ceiling, I can quite clearly see the outline of the beams through the plasterboard ceiling. That isn't the case in any of the other bedrooms. I was worried the extra weight was pushing down the joists somehow, but thinking about it, you're right that the ceiling plasterboard is attached to the joists so this wouldn't make sense, would it?

missile

I can only guess at what might be causing your problem.

If the insulation material is thicker than the depth of the joists it would be compressed by the loft flooring and thus will be exerting pressure onto the ceiling.

Modern houses are often built to minimum standard and the joists may not be strong enough to support the additional weight of the flooring, plus what you have stored and you walking about in the loft.

Bowing often looks worse than it is. If you put a straight edge accross the roof, you ought to be able to measure how bad your problem really is. If less than say 12 mm, I would ignore it.