Evie

Is it possible to have a cavity tray in a solid wall?

No, I can't. And would have to admit my ignorance in these matters. I'm just assuming that having lived here for over 30 years and the pebbledash done a few years before that, we have not experienced any damp issues. Which I assume would have become apparent by now. However I could be completely wrong.

Not considering external wall due to expense as the whole side and front would have to be done. The pebbledash is in good condition, also not keen on moving all waste pipes to accommodate external insulation. We are just wanting to add extra insulation to one inside wall in a room we are extending, so will do it along with renovations.

I'm so confused with reading conflicting advice, hoping someone can help. Our house is a 1920s semi with solid walls. It is pebbledash on the outside, this was done around 35 years ago and it's fine, so must have been done properly to allow the walls to breath, we have no damp issues as such. We are adding a back extension and at the same time want to update and insulate the existing inside wall. I believe the wall still needs to breath so I think I can't go for insulation that seals the wall. I was thinking of adding a frame, boarding this and leaving a small cavity, the floor space would allow this. I will be getting a professional to do this. But we've had professionals before who don't fully appreciate issues with old buildings. What would be the best way to insulate this outside wall from the inside. Many thanks

Thanks for the reply. I think that is making a little more sense. We would obviously have to remove the upstairs window to remove bricks. The architect has indicated that we would have 85mm upstand, but builder says to add tray as an extra measure to prevent water ingress. Is he being overcautious?

Hi, hoping for some advice reassurance please. We are adding an extension to the back and side of our solid wall 1920s house. After much deliberation we have decided on a pitch roof, I prefer the look of this and also we won't need planning consent. The architect has designed a 15 degree pitch, but we do not have room fot the recommended 150mm upstand due to 2 upstairs windows, however the architect has reassured us that the reduced upstand is still with the guidelines. We have had a couple of builders take a look at the whole of our plans so we have some reassurance that what we are doing is ok before the architect completes the building reg drawings. One has suggested that we may encounter problems with a reduced upstand, albeit within guidelines and is suggesting that we incorporate a gully tray. Not sure what this is but tried to Google. Can this be done on solid walls? What are people's thoughts? Thanks in advance.