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So two extra full length joists at in this case ~150mm centres?

Hi All, Hoping this is my last post about floor joists for a lifetime and thanks in advance to anyone who has answered previous queries! Pic attached is my dry run before things get secured down. 400mm spacing has left a few areas where floorboards wont have great support and when I get to the...

Moving the joist out further isn't an option, just out of pic the pipes tee off left and right and are taking up that space, so I need to get the pipes through or under the joist. Think the only options are taking pipes straight through middle of joist (if that works out in line with BC...

I'd need to look at drilling guidelines but I don't think that would meet them - think holes have to be equidistant from top & bottom edges and 3 diameters apart (would need to measure pipes). But suppose I could see about cutting pipes and repositioning them so they are centre and meet the...

Hi All, Looking for some help. Pic attached shows two 22mm rad pipes coming out of the hallway (concrete floor) into suspended timber floor and are messing with my plans to run a joist along the wall where they come out. The joists are 100mm which means I can notch max 12.5mm from them. However...

thanks for the advice - rolling DPC out and timber on top, relying on gravity may be the best approach. I don't have much room to build up mortar, may get away with just an 8mm bed but will double check. Could always use metal strapping to secure the wall plate down while I put the joists down...

Hi All, Attempted what I thought would be an easy job, and the first job I have putting down new timber in a suspended timber floor - putting a DPC roll across top of the sleeper walls before sitting the wall plate on top. I laid out a thin bed of mortar (1-2mm, using one of those pre-mixed...

ok, great, i'll work on that basis then. I'll leave a gap around the hearth so not to be butting timber up against masonry, but not 40mm. As for the joist bearing distance i'll work from the Eurocode 5 guidance of min 40mm, can only assume the local BC guidance is a bit dated at 2012. Thanks for...

Yes, 4th edition of Eurocode 5 states minimum bearing of 40mm, for some spans 50mm and longer for practical reasons. Attached is in the technical booklet from BC (done in 2012)...

Reason I raise the point around the 40mm above is that BC guidance doc also says that if the end of a joist is supported on masonry, the end bearing should not be less than 90mm. I assume a joist sitting on a sleeper wall fits this category and i therefore need to have a bearing of min 90mm. If...

Thanks woody :) If I am to future proof it as such and potentially want to open the fireplace up again at some point - or if future owners want to I understand the distances are: 200mm from inside surface of flue or fireplace recess - think i'm fine on that point as the recess is tiny...

Do building control have to get plans and sign off on the installation of a land drain/soakaway?

Yes, there are bricks blocking it up (y) will become what I think is known as a faux fireplace and will retain a small hearth as I can't be bothered digging out the hearth that's there!

Good question - probably have to describe as rural with farm behind us and right of way to the farm running up the side of the house but equally close to a town (within mile or 2). I'm not sure to be honest how the council would define the area, probably within town but by no means built up (on...

Hi All, Picture attached of the setup I have for my fireplace (blocked up and not in use). Apologies for the dodgy powerpoint plan! I'm replacing the joists/wall plates in this room and wondering if there are any requirements about how close the wall plates/joists can be to the concrete blocks...

Hi Everyone, I have quite poor drainage around the house - clay soil, slope down towards house, and in periods of heavy rain the water can rise up to worrying levels at the front of the house (I think over the years the ground level has been raised up too much as well). Almost impossible to...

The setup i'd proposed (for 100mm joists) was 100mm kingspan k103 (inbetween joists) that would give u value of 0.22 (0.6 PA ratio). There is ventilation to the void so I thought that was all good and the insulation proposed would meet u value requirements. However, steer i've got from comments...

Intending to do it under building regs despite several builders/architects saying to just crack on. If I do go down the route of doing just what suits me, and inspector doesn't approve, what are the consequences of that? assume problems for me down the line if I want to sell the house and have...

I thought calculators provided by insulation companies take account of the joists thermal conductivity and offset this against the insulations thermal conductivity inbetween the joists, giving almost an average for the total floor (obviously not though as their setup is in-between the joists and...

Ok, thanks, I get the point about the joists themselves being thermal bridges. However, with a suspended timber floor supported by in my case 4 sleeper walls, it's not possible to board end to end across the room under the joists with no thermal bridges. Each sleeper wall will create a thermal...