boxrick

A very generic reply from the manufacturer technical team... whoop

My architect seems to think that we should just leave it at this point. I may float the idea of removal to my builder and gauge his reaction. Given its all fresh bricks and currently dry, removal wouldn't be *that* hard. My feelings are, if / when we flood again ( maybe it will never happen ? ). Just cut into the walls then and rip it all out and replace with blown bead. We could even do a moisture test, its going to be no more expensive that it would be to do it right now?

So now the question is what to do. Leave it in or get them to rip it out and then look at replacement with something like blown bead OR if / when we do flood again we do it at that point. I'm guessing to remove it all will mean a brick removed every meter or so and it all pulled out. The cavity has no weep vents anywhere right now.

Can you clarify? Here are a couple of pictures from about a month ago when the cavity was exposed as it was built up. It looks like there was a slope towards to external wall.

Yes thats the DPC

We still have a whole lot of build to finish off. Money is being sent as each bit is completed. My property currently has no roof, so its far from completion. I have been holding back some funds from each payment for 'snagging' on completion

Hey I appreciate the reply! Just to confirm the specification for closed cell insulation below DPC was definitely due to previous flooding, it has been written in the architect notes because we were flooded earlier this year. There is an entire section on flooding. The superwall 32 has been used instead both above and below DPC, despite the instructions. Given this how serious an issue am I facing if I leave it as is? Should I be pushing the builder to put it right even though the extension is finished, this will be a major piece of work? Does anyone have experience of getting this sort of thing rectified? Any advice on the best way to handle it would be much appreciated. For extra context I plan to apply a tanking / heavy waterproofing slurry externally when works are complete.

So in summary... I am renovating my house. My Architect specified that below DPC rigid closed cell insulation to be used. Above DPC we were using full fill and in this case we have specifically used https://www.superglass.co.uk/products/superwall-32-cavity-wall-batt/ For context we were flooded at the start of the year. I was looking at the cavity of my new porch ( this is the last thing to be built ) and its clear its just full fill with the same material above and below. So now I am worried about this and would like some advice about how much you guys believe it matters, should I be insisting this is rectified ( given that my entire extension has now been built.

I'll move it closer to the border. Sadly looks like it's going to be the blue one now

My builder seems to think we can rest on this current external wall ( it will be internal soon ) which will make the span shorter and all this simpler My structural engineer has said 'It will be steel ridge beams with timber valley beams and rafters' I have asked him to do the structural calculations for this I also contacted Mitek who said they can help, but said only through one of their manufacturers, so I reached out to 3 near to me and am awaiting replies. I think the final thing here is my roof insulation construction is going to be completely different now, currently thinking 300-350mm of Knauf Earthwool Rafter Roll 32 or warmcell as mentioned above

So actually, from the sounds of it. Sacking off the companies, designing my own system based on feedback here is probably a better option?

Yea... as seen in other thread. Warm roof.

Ahh ok And any reason warmcell insulation instead of something like Knauf Earthwool Rafter Roll 32?

Heatpump ( getting a heatgeek to design and install UFH / ASHP system for me ) , see blue for likely or red for preferred but unlikely ( depending on land swap with neighbour )