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So I’ve got this mad idea to make my warm roof construction seem a bit thinner which will hopefully both look better and save me some pennies by using smaller facia boards. I’ve drawn it out rather crudely attached but the basic premise is to cut my rafters flush with the stud wall top plate...

I'm building a garden room with floating floor. I'll be framing off a 2 course brick wall. which is 140mm high (2x65mm +10mm mortar joint). First question is If I use 100mm insulation and 18mm flooring then is it ok to finish 20mm below the brick? I would probably run the DPC between the...

Yep it’s a nightmare, do I space joist for the osb, plasterboard or insulation? can’t believe no ones sorted this mess out over the last few decades I probably stick with 400. Thanks everyone.

Yes 9mm osb

Hi Folks, now I know the standard framing would be to use 400 centres to work with plasterboard. But.. If I'm insulating between the studs and using 2400x1200 solid PIR then that would create a lot of wastage. (350mm between studs is 3.75 boards). Insulation is expensive, plasterboard is...

thanks guys, was probably overthinking it, i've gone with the floating floor.

I'm not getting much traction on this. all the threads i've found involve building a shed on a slab of the same size. can't find one about building of an oversized one. Ive outlined some costs and think the building of a joist system on concrete blocks on the slab seems cheapest but no-one seems...

Yes thats pretty much the way to go, I hadn't thought about the vertical insulation up the side but good call. Its either that of the Joist frame suggest which would be cheaper. I would be concerned that having made a brick 'swimming pool', that it may decide to fill up with water before I can...

I just worked out some basic costs. If I lay 15 blocks around the perimeter to support a 6mx4m in timber joist system total cost for timber and blocks will be around £475. Ill also save on insulation as the 16 joists/noggins we eat up around 1.6 sqm of the 24sqm floor area and I also won't need...

I’m about to start building a Garden room. It’s 6 x 4 metres, normally I would probably build a Joist frame on piles/concrete blocks or something but this time there is a slab in situ. the slab however is 8x5 ish so I can’t build along the edge. As suggested in another thread I should just lay...

Hmmm I thought the whole point of this was to have no joists, so how will they flex? im just trying to keep the timber off the ground and a strip of dpc just isn’t my going to cut it IMO.

Ok in consideration to the points above and also chatting to a builder mate of mine I'm going to lay two courses of bricks and mortar my DPC/Wallplate to that. I'll then build my studwork of that and fill the void with DPM/100mm insulation and 22mm chipboard T&G flooring. Ill lap the DPM up over...

Thanks for the comprehensive reply, I hadn’t considered doing the floor last, most of the stuff I’ve seen you start the frame off the edge of the floor/structure. I get what you mean now so will definitely consider that method. I’ll probably end up with a cold roof as I think the warm roof...

ok I think i've got that now. I wrap my 4x2 studwork base plate in a 300mm DPC and screw through it to anchor to the concrete, (won't this pierce the DPC?) then I fill the internal space with a DPC sheet lapped up the stud work to above ground floor level. I'm assuming that I will have to...

Thanks folks worked a treat, just need to get it realigned at some point.

thanks Job, Excuse my stupidity but if I lap the DPC inside the wall framing then I would have no DPC on the wall plate? I think I am over-engineering this? My brother basically ordered a garden room and built a 150mm concrete slab that he oversized. they were going to slap this new room with...

so a floating floor is just that. I just lay a DPM,Insulation and then chipboard flooring. What holds it all together then? surly some sort or frame is required? Also in my case the slab is oversized so whats to stop the rain from running under the DPM as it has nothing to 'lap up' its just...

well I checked the brushes today, what can I say there was only one in there! i've order replacements and will try tomorrow. the motor was in and out last time I tried it.

i'm building a garden office for year round use, would I be better off with a cold or warm roof?

well the customer is my brother and under strict instructions to keep cost down!