You do produce some really good loft videos Robin. I wonder whether you would consider a teaching video on how to design a timber T-beam using 18mm plywood and 100 x 50mm joists for a roof or floor where headroom is critical?
Dear Robin I've watched many of your Videos over the last couple of years. What I cant find is how to put up Superfoil type insulation. There are may Videos which show you how to do it but don't show properly how you apply it when you get down to where eves are. Most of the draught comes from there and through the tiles but you still have to be mindful of lack of air flow and cold spots. At the moment info like this more valuable to the average person given heating costs. If you know of a video that does explain it fully I would appreciate it. Best Regards Graham Newman
The new joists should have spanned and sisters the old joists their full length for proper floor support as the attic is being converted to living space. Likewise the rafters should completely sister the full length of the old rafters.
Love the channel doing a diy conversion on a semi d truss hip roof the trick is in order to put the steel in we need to cut some trusses so my plan is to strengthen all rafters before I cut so the roof will hold until I shore it up with a steel beam which is approx 1 meter high
I love your videos! I am in the process of applying for a certificate of lawfulness because my house is built on existing plot and i want to be in no doubt... my architect says the dormer cheeks can't be exposed brick (should be cladded apparently) but I see a fair few properties without cladding. I have a linked detached house with only garage linked to one of my neighbors.
@@RobindeJongh fair enough, all the conversions we've done engineer has always made us take the tripples down to the plate, even when we have had steel and studs, just curious
Hi Robin, please advise, How much minimum clear height is necessary from the top of the floor joist of the First Floor ceiling to the bottom of the ridge board in the loft conversion. Assuming that 152x152x30 mm floor beam and 152x152x37 mm ridge beams will be used. Take in count 20 mm thickness for a deflection of the beam and 20 mm M.S spreader. 2000 mm clear height is necessary for a loft conversion. In my opinion, a Minimum clear height of 2000+152+152+40 = 2344 mm will be required. Thanks
Hi Fiaz. Hopefully the middle portion of your ceiling will be flat, with the ridge beam above that. So the depth of ridge beam isn't an issue. Also usually the floor beams are hidden in the stud walls. So really it's down to how much headroom your client wants, and how much of the loft area they can stand up in. UK regs are not too prescriptive with ceiling height.
@@RobindeJongh , Thank you for your prompt reply. I am also Civil/Structural Engineer. I have inspected one loft. Clear height between top of joist and bottom of ridge board was 2000 mm.I have advised them Your height is not enough. it only possible for them to lower the first-floor ceiling? But the client builder is saying that he can do it without lowering the first-floor ceiling. I really can't understand how he will do it. The depth of the ridge board is about 120 mm. Where minimum depth of new steel floor beam and ridge beam will be 152 mm each.
@@Fshah1 you say you're a structural engineer but the point you raise doesn't relate to the structural stability of the build, rather it relates to headroom within the room. Robin has already responded to you that the building regulations in the UK are not too prescriptive regarding ceiling heights. The only exception I think is staircases which are prescribed.
I don't think it's a bother that your dormer ceiling is a tad lower, you can still stand up in it. Could always change the dormer ceiling joists to raised ties affixed to the rafters to raise that ceiling back up
