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^woody^, I was advised on my post/thread (below) to put in a breathable memebrane so I went bought a 50m roll yesterday. I have'nt put it in yet but is this advise not correct then? http://www.diynot.com/forums/viewtopic.php?t=169156&start=0&postdays=0&postorder=asc&highlight=

oh, didnt know it was old, i just did a search. sos. By the way, what is a gyproc?

i have breathable membrane but not sure how to fix it onto my roof from the inside (see pic below) Also, Whats a joint lap?

Anybody, Is there any harm with me painting the timber and shuttering ply with something? If yes, any ideas what with? (for piece of mind) Also, i have bought the breathable membrane but where would it go, between the loft insulation and plasterboard or between the loft insulation and...

THANKS. just needed confirmation i wasnt sure as theere will always be a cold part (ie the one next to the elements). Thanks again guys Im off to buy space blankets now from wickes. Its buy one get one free at the moment,

Hi, i saw that post but didnt know the rational behind it. The website calculators are telling me different, Cheers Tony

Hi, Are there any people on here that know about screeds? I now know I want 50mm thickness but this means I need 28 bags of cement (700kg) and 82 bags of sand (2050kg). This was on a calc for 4:1 I think. Is this correct? Please can anyone help as I am looking to buy and pick up the...

Thanks, no the doors have been shut... I have just opened them and will leave them open all day today. and tomorrow.

After much research.... I have found for 25mm thickness i need 14 bags of cement and 41 bags of sand which equates to 350kg of cement to 1025kg of sand. 1) Am i correct in assuming 1025kg of sand is one tonne ie 1 jumbo bag? Its just the guy in the shop said i need 2 jumbo bags!!! 2)...

So the 41 bags of cement and 123 bags of sand that they show (im assuming sharp sand) is not correct? for 75mm? or are u basing this on just an adequate screed depth and not 75mm?

Actually I got the one above WRONG. that calculation was for concrete. The one below is for a screed? Its the same volume but are the parts correct? I was told i need ballast Cheers Tony

-x

So putting in insulation does this remove the cold surface? I am assuming that there will always be a cold surface, ie some place where the hot meets cold even if i do insulation and plasterboard.

Hi, How do I calculate how much cement, ballast and/or sand I need to make a screed floor. (Im not sure if I need ballast or just sand it needs to be strong as I am using this space as a gym?) The size of screed will be 5500 x 5300 x 75mm. Below is a pic of the where the screed will...