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What should I do instead? Glue? I've done half of the lower deck already.

I'm screwing to the outer skin. I don't have a wall plate, but my joists are strapped (every 2m). The OSB boards are screwed to these joists. The joists stop at the inner skin. It's just the edge (200mm), where I'm fixing directly to the bricks.

I'm wondering whether there is a better way to fix my timber. I'm building an extension and currently doing the flat roof. I'm screwing the deck to the edge bricks and then other timber will also be screwed through this. I've been using 60mm concrete screws so far, but if they hit the mortar...

I found this https://www.fixfast.com/skills-hub/correct-washer-and-fastener-combination , which seems to say the industry standard is a "12mm minimum penetration through the underside". I'm assuming that means 12mm into the OSB. I've found a screw/tube combination that will give me 17mm...

It would mean that the ones that miss would be sticking through and I'll be running services through those areas

I'm building a warm flat roof with 200mm insulation sandwiched between two sheets of 18mm OSB. I'm wondering whether the top deck needs to be screwed into the joists or whether the screws only need to penetrate the lower OSB deck? I thought I saw somebody online say that they should go into the...

It's very hard to see lateral restraint on flat roofs on youtube etc. Is lateral restraint always required? Would my brick corners and steel beam act as lateral restraint? i.e. Can the restraint start 2m from the corners?

I think you mean a single piece of timber going through the joists? As they are metal web the timber can go straight through them.

I did suggest that but the roof designer person advised against it because it may weaken them. Is this the done thing?

I'm trying to work out how to provide lateral restraint for the angled wall on the left (if it's required at all). I'm using metal web joists and it's only single storey. On the TRA site (page 13 at in https://www.tra.org.uk/wp-content/uploads/dlm_uploads/tra_metal_joists__single_final.pdf)...

I think I'm going to spend the time and cut the bricks as anything other than bricks will require a taller fascia. I'll probably use some masonry screws to screw the timber to the bricks. I'm struggling to think of something that is simpler than cutting a piece of wood and gluing it. I think...

It would be good to hear about your much simpler way. I've posted a photo above. I don't know whether that shows you what you need.

Here's a picture. Engineering brick is only there to push the insulation out of the way so that you can see the brickwork clearer. On the right, it's a firring strip on a metal web joist. The brickwork is currently lower by approx 75-125mm.

No, no roof over-hang on any of the sides.

I've covered it up for the evening now but it looks pretty much identical to the video but without the timber on the outer skin. Here's a picture from the video . My inner skin and insulation is also a bit higher than in the video/picture. I may be able to get a photo tomorrow.

I'm doing a flat roof (brick and block cavity walls) and I'm reaching what is potentially the final course of bricks. I was planning to cut the last course of bricks at angles and then fix the OSB deck to them. I've realized that this will take a long time. I'm wondering whether I should use a...

Isn't the top of the board unfinished?

I have considered it, but I'm a little unsure whether there would be any issues with water penetration. I believe the metal ones push down on the rubber and have an EPDM washer. It's probably a good idea, but it's not something I've seen.

I'm doing an EPDM roof (Resitrix) and it looks like there are two common types of edging. There is the "Sure Edge" and the metal edge trim. My roof isn't square, so a couple of corners aren't 90 degree angles. This means that the plastic edging would need to be cut and glued, but I think I...

(y) I wasn't going to glue the joints. Some people have said that it makes it hard to get up in future, but if I ever remove the EPDM then the OSB is likely to be ruined anyway as it will be stuck to the OSB. I think i'll glue them to reduce the chance of noises etc. I'll see how it goes...