Oz07

In this case I doubt it will be noticeable. It normally happens more when you have a bastard valley. The ones you see are not purposely setting it lower they are just keeping the internal line set flush to the rafters Think of it if you cut a 6x2 at 10 deg it will be near enough 6" across the cut, cut it at 45 degrees and will be a lot longer.

You're worrying too much if it were a passive new build fair enough. To me it looks like the installers have done an ok job with the circumstances. What did you expect the door to be made 25mm short then insulated below and sit on pvc packers which are cold bridges anyway? To me it looks like your screed has no thermal break to the outside bricks. Completely beyond the remit of some pvc door installers. Atleast they've put you some dpc down, thats above and beyond IMO. If you wanted to sort any potential defects with the way your building was put together you should of ripped the old frame out, done what you needed to do, then had the frame made to suit the alterations. I think your out of order trying to seek redress for this. If your getting a draft a good healthy bead of silicone around the internal and check the locks and seals are adjusted right. That's fair enough.

Do you not get option for 32mm connection there? Who's your water board? Good idea to come up just inside the garage. If you can tunnel under enough you can get the pipe up through the bottom and just repair dpm with tape and membrane. It's got to be punctured to bring the pipe up through anyway

Why would you want to make your life harder? If you've already boarded I'd just use the foam.

It's just because the valleys are on a lower pitch so the plumb cut is higher on the main plane of the roof.

Much less than masonry in the hole then? What is op worried about? Position in cavity?

32mm is ok round here although the depth you've got isn't good. Are you thinking of a new trench through the garage slab or just a hole to bring it up? Any sketch?

Welcome... If doing ufh in slab, with the ufh stapled to insulation and no mesh, is this ok with concrete and cutting crack control joints in the top 3rd? Would the pipes likely accommodate any movement the concrete could make

That foam will cover the gap. I got a good air score last time and didn't worry too much about this junction. Think I just used the foam as above. I would guess its one of the less crucial airtightness details on traditional construction

Could illbruck foam the gap once boarded if you leave the boards an inch or so off floor gives a good gap to make a nice bead. Cut back flush with board once gone off

Excluding the fact op mentions block of flats do people here really get an SE to design how their windows will be supported in the opening?! For instance if building bog standard building regs you just overhang the cavity by minimum 30mm for part l regs. Nobody worries about whether the masonry will support the glazing. As @FuerteStu says the weight of brickwork in the same opening would be getting on for 250kg plus mortar just on the external skin.

Someone on here recently did a blog post with their place getting sprayed and back rolled i asked a question in the blog. I'd be paying someone I've tried it before with a cheap sprayer, had to pole sand the lot. As it happens a painter I know on site prefers to mist coat them before the skim has fully dried. Says they drink the paint otherwise too much topping up the roller. Can't really see a problem with this for a mist coat watered down anyway. He gets 150 a plot for mist coat whether it be 2 bed or 4 bed. He can finish them by 1pm and get back to the plot he's in. Has a neat corner roller for internals

Is it single storey? Even if its 2 storey if existing is 50mm cavity you might be overthinking this. It's not like the existing building is at passive levels of insulation. It's likely to not be the only cold bridge in the house whats the existing floor insulation? A 4" break should be fine

When does this come into effect?

Search @nodposts with pcc mentioned. On his most recent build I believe he's used a "guarantee " company who effectively just issue you a pcc i think. Not sure what happens between year 6 and 10 maybe it is a more comprehensive scheme than the architect I've used.

I use architect who issues pcc

🤣 I see you've been full black pilled now! I'm not sure whether your plan will work but gotta try I suppose. For anyone digging this thread up in future just do what I did. Fence it off and keep them out.

Insurer - how much in % of you roof is flat You - 100 Insurer - 🤑

"That valleys gonna give me problems down the line"?

Take external skin right way up level with top of rafters, pro need to leave top course till rafters on so know where to set line. Take internal skin up and either sit rafters ontop or use a pole plate and hangers. If sitting rafters on blockwork probably need trimming to sit flat on the block and a bent strap hanging over end of blocks. Can you do this off your own back nowadays or do bcos want some kind of detail drawing

What if the other 3 walls of the garage 4" brickwork

Yeh but if the other walls of the garage are 4" brickwork with pillars what would it be achieving. Logically it wouldn't have any benefit?

So with a single storey garage adjoining a 2 storey house would you bother with the stepped tray or not. It's going to disrupt the continuity of insulation, im not even sure if blown insulation would overcome this. The garage wouldn't be integrated so would have good ventilation. I wonder if bco would make you put the tray in or in this case let you omit.

Have your building control or local council given you the address?

Low exposure area, midlands. I would say high exposure relative to the location. Opposite a park at the top of a small hill, no soffit overhang. Rain quantity high we had emergencies declared early in the year lots of local floods. Stretcher bond so average amount of joints. Height of wall only 2.5m. Has anyone ever actually seen water running down the inside face of a 4" wall? It probably does happen in more exposed areas but I've never seen it. I've always used trays in the past just thinking out loud.