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If I can't use this celotex product for a full fill cavity does that mean I have to use the Rockwool type? Cheers.

The 47x125 is just a smalll area of about 3m x 3m and the 47x147 is only 2m x 3m approx so there small areas. How come?

Vaulted ceilings plasterboarded, rafters 47x125 and 47x147 in places. Also first floor joists also 47x125. What do you reckon? Cheers

Ok thanks guys. Could I also use it in the ceilings? I've read the fact sheet again and it says specifically for use in masonry cavity walls

Hi. I have the chance to get a quantiy of celotex cw4100 100mm 1200x450 insulation panels. My architect has specified a 100mm fully filled cavity in the walls but just wanted to check to see if this insulation will be suitable? When I look online it says that these are for partial fill cavity...

That's really helpful thanks Deluks. Circa 400mm - thats quite a bit to dig out! Cheers. Ben

Hi. My new extension steps down from the current floor level of the existing house to a lower level. My question is - once I have worked out how far below the existing floor level the new floor level should be, how much more will I then have to dig out to allow for the construction of the floor...

Hi there. Is there anything in building regs which prevents how near you can build to a Well? My foundation will be about 1.5 metres away. I think the Well is about 3 or 4 metres deep. The only recommendation from my struc engineer is to prop the well from the inside when excavate the...

Hi. I have recently had aplanning application approved to extend my house and one of the conditions was that the sky lights in one of the new bedrooms must be fixed shut with obscured glass. The room doesnt contain any other natuaral source of light. This is no problem but now want to do away...