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I think the problem with that is if the screws don't come through, they won't go into the purlin either. You could screw from the inside if you really had to, but that has it's own complications so is unlikely to be the best option.

I would use the celotex, but I would buy what you need on Gumtree and get it for the price of your polystyrene. There's always one or two people getting rid of small amounts at about £30 a sheet near me. Secondsandco will supply close to that price, though you don't need much so delivery will...

Personally I would work out where the first hole should be and then try it out. If I missed I'd maybe look a bit closer from the side and move up or down the roof and be confident I'd then hit. Same at the other end and run a line between them and you won't miss many. You can bring a mark...

If there's enough load to move the gable wall then there's a lot of load on the floor joists. Most joists aren't adequately stiff in that direction or adequately restrained at the ends to resist a large lateral load as they're simply not designed for it. If they're mortared into blockwork at...

It's the same thing. If both ends of the strap can move then there's no restraint.

Yeah, Id' have no concerns, but I'd run the solvent weld, not the hose. It's no different to all the other pipes under the bathroom floor that I hope I'll never have to touch. I'd be more concerned if it was downstairs, but you have a ceiling you can use for access if you really needed to.

Ha ha, only that my Dad has just had an extension done and I know BC asked him to cut up the bit of the existing wall that was left bridging the new cavity to fit a vertical DPC. For some reason they didn't ask for the wall to be cut fully through, which I don't understand. I'd just ask BC...

How are you fixing the floor at the gable walls? If you resin-fix a wall plate to the gable you should be able to then use that to affix the restraint straps to. You haven't said which way your floor joists are running, but either you need a wall plate to hang the joists from, or you need one...

Are BC asking for calculations or do they want someone to inspect the wall and check it's OK? The calculations you have assume the wall is vertical and that it is in good condition. A 100mm wall doesn't need to be much off vertical over 4-5m to leave the end the top brick sat completely...

The local geological features mean very little when you're talking about digging into a patch of earth around 20sqm, especially as you already know the ground has been disturbed right next to where you want to dig. Round here BC don't allow you to dig at all until they've inspected so they can...

Your electricity cable should have been shrouded before the scaffold went up too.

I have approved plans that say the same, dig until BC are happy. How can you specify a depth before you've dug, short of getting a rig in to take core samples?

What did the Party Wall agreement say?

If it doesn't line up it doesn't take too much messing around to get you to the point where it would be quicker to resin-fix a wall plate to hang the joists from and then fix your lateral restraint to that.

Most builders are perfectly capable of doing a really good job, it's just there's more money in doing a quick job and moving on to the next. Putting experience aside I bet if you took the hours that have gone into this and translated it into an acceptable price for a builder it would be a huge...

You have frost on your roof, your roof is freezing. It's pretty much inevitable that any warm air leaking will cause condensation. Just keep an eye on it and see what it's like when it's warmer and check that it's not been so wet over a prolonged period that moisture has dripped into your...

You need a fire alarm and fire door. The fire door lets you stay in the loft while you wait for help, or isolate the rest of the house from a loft fire. The alarm gives you early warning, but you can't rely on then being able to get out immediately. You can't exit the stairs into a habitable...

You need a fire alarm and fire door. The fire door lets you stay in the loft while you wait for help, or isolate the rest of the house from a loft fire. The alarm gives you early warning, but you can't rely on then being able to get out immediately. I'm in the same position, though I can't...

Lots of BCs don't like gallows brackets at all because they rely on the lateral strength of the wall to deal with the horizontal forces they impose. It's not easy for a structural engineer to assess whether an old wall is strong enough in the plane it was never designed to take any load in.

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F291819778256 Honestly, they're all over eBay if you can measure.