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I'm going to cover an insulated dormer wall with a 500g VCM; can anyone tell me (a) how its first fixed to the studs and (b) how you fix the plasterboard over it - presumably the screws/nails penetrate the vcm and thus breach it? Or is that just accepted?

Can anyone explain to me the difference between breather paper and membrane - or are they the same thing? I'm using Klober permo forte for underlay on my pitched roof, and I had assumed that the breather membrane I would use on my dormer walls (cladding, 25x38 batten, breather membrane, 18mm...

Hi - anyone out there experience of these "Certainteed" products http://www.almuracladdings.co.uk/page4.html . I've seen them on some small and medium building plots; up close they look nice, and I'm presuming they batten fix as upvc. They look a bit classier, I think, but found some USA based...

I'm designing a fairly standard dormer extension - all planned and approved, and I've been looking at how it will lay down on its sole plate over the existing wall plate / first floor floor joists (its an existing room in a bungalow with a gable end roof which I'm pushing out to the side. I'm...

The builder's sand I got from Bradfords seems quite coarse; I've used it to lay some 7N blocks, and although it doesn't feel as workable as finer sands I've used (quite a coarse surface and a few small stones) it all seems to go off OK. Is there fundamentally a problem with using sharp sand...

I've seen suggestions that the sole plate of stud work on a first floor is either (a) set out and fixed after the floor boarding is down (in my case 22mm board) or (b) before the boarding is down ie onto the joists. I can see how (a) makes it easier work (assuming you remember where the...

I'm installing a new window in a gable end (BC approved) and have done the inner leaf; have taken down the outer leaf and now want to build back up. I know there are a variety of replacement wall ties on the market, allowing you to insert (some with resin) the tie into the existing inner leaf...

Is there any rule of thumb that applies to whether you would use dot and dab to secure plaster board to a block wall, or use timber battens, or not use plaster board at all, and use render? I've got a couple of cracks that I'm confident I can repair with steel mesh, but if using plaster board...

Ok may be a daft question, but when you see a block wall with a course of bricks in it, I'd always though that was to get the wall to a correct size without excessive block cutting - either vertical height or horizontal. I saw a big garage recently that had a course just above ground level, and...

I've searched this site and all over the shop, but can't seem to find out if the thing I want to do is unusual or wrong. In planning the first floor bathroom and ensuites etc, I need to discharge two WCs into the soil stack. Question - is the correct way to do this via a double equal branch...

I am about to de-commission and old (mixed origin!) gravity fed central heating system, but before I do I'm just confirming my understanding of how it all works. The boiler is a Potterton Prima C and I've traced all the flows and returns, and everything seems consisent with 'text book'...