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Expanding foam? Silicone?

Have you got back in touch with Geobear? What guarantee do they give for the works carried out?

You could increase the headlap of the tiles but if the manufacturer states 17.5 deg as an absolute minimum then they still won’t guarantee it. Or swap out your tiles for tiles rated to 15 deg? Or nail firings to the top of the rafters to get to the required pitch?

Depends on what you mean by architect and how skilled and knowledgeable your builder is. If you mean someone who is a qualified architect registered with the RIBA or ARB, then probably not. However, if you mean someone who can draw plans and details, and has a good understanding of the...

No difference. They all have approximately the same thermal resistance. Glass wool is more likely to make you itch if you don’t wear the correct PPE. Recycled plastic is another option if you want to do all you can to save the planet. Other than that, it mainly comes down to cost.

I wouldnt normally specify anything larger than a triple joist - I’d specify a steel beam if a quadruple was required. OK, I assume you are planning to rest the long trimmer on the blockwork, so no hangers required there? Also, it says TBC. Why not ask your designer to confirm as they may be...

You might be OK without if you are on non-shrinkable granular soils but I'd put some A193 mesh in as it'll help to prevent differential settlement and potential cracking, especially if you are on shrinkable soils or made ground. I assume you've gone to the appropriate depth with the foundations?

Shouldn’t have an issue with upward movement as long as the pins are formed beyond the tree influence zone. Which they should be if the NHBC tables are followed. Best to carry out the underpinning following a wet winter when the gap has closed up as much as possible. Piling would have been a...

If you aren’t selling imminently why worry? Do the doors still open and close? You might be able to realign the doors so that they continue to operate normally if they get any worse. Underpinning won’t close the gap up so you’ll still be left with a crack and misaligned doors unless the crack...

An inch?! At the top of the dwarf wall?! That’s pretty significant movement! 25 feet away is close enough for trees to have a significant influence depending on the species and the volume change potential of the clay soil, especially considering the foundations are likely pretty shallow. It’s...

Have they advised whether they are likely to approve amended plans? Sounds like they might if it won’t look out of place on your street…

I wouldn’t underpin a conservatory. Would your buildings insurance even cover underpinning for a conservatory? If you were able to claim, once underpinned as you know you will have difficulty with future insurance premiums and it may affect your sale as the value of the property will inevitably...

Not if the hip roof is part of the extension. Permitted development rights only apply to the original property, not any extensions.

Interesting… Just did a Google myself - this might help you… https://cornellengineers.com.au/what-is-a-vapour-barrier-under-a-concrete-slab/

If it’s Victorian it’s most likely the wall supports ceiling joists and purlin props. Usual for joists to span onto the spine wall in Victorian properties, plus the nibs left either end would suggest they are supporting something.

That’s why I asked if it was leaning. Doesn’t look like there has been any horizontal movement at the joint (OP can correct me if wrong) and the diagonal crack pattern several courses down is more indicative of foundation movement than movement at the top. The original crack might not have...

How wide is the span? Could be a flitch beam if the span is short, or maybe you need a stronger magnet? It could also be that the beam is somewhat shallower than the joists so it’s 40mm or so away from the surface of the plaster. I’m gonna go out on a limb and bet a whole £ that there’s a...

Looks like minor downwards foundation movement at the corner. Garden walls aren’t a building and so don’t have to comply with the same regulations as houses. For that reason the foundations aren’t usually as deep which means there is more risk of movement and cracking. For this reason it’s...

Oh yeah, you could use some air bricks to fill the void but if you can fit a couple of lintels over the top and get the levels right then it should work fine. You could fill the cavity with a bit of concrete or more insulation but the insulation slabs will span the cavity if thick enough.

Take the wall down to level with beam and block floor, then DPM and insulation??