Missing Cavity trays

jollyj1984

Very Interesting, so your saying where the bricks were removed to install the cavity trays it caused the wall to drop or move somewhere? 

Tucker said:

I have seen plenty built without them and I think because they are quite tricky to fit, some take the easy option and don't bother. 

I had the cavity trays fitted in mine but it's not done without problems. I know my bathroom window above the tray never open and closed properly afterwards and it clearly dropped a bit on one side with it being fixed to the outer skin and several courses of brick were removed and refitted below it, so it was obviously unsupported at some point. 

jollyj1984

casper_gutman said:

Maybe I'm missing something, but surely the point of cavity trays is to close a wall cavity and stop water from flowing down inside. But didn't you say you had single skin walls...?

It's a cavity wall and the extension has made the wall above an Internal wall 

stuart45

jollyj1984 said:

Very Interesting, so your saying where the bricks were removed to install the cavity trays it caused the wall to drop or move somewhere? 

Tucker said:

I have seen plenty built without them and I think because they are quite tricky to fit, some take the easy option and don't bother. 

I had the cavity trays fitted in mine but it's not done without problems. I know my bathroom window above the tray never open and closed properly afterwards and it clearly dropped a bit on one side with it being fixed to the outer skin and several courses of brick were removed and refitted below it, so it was obviously unsupported at some point. 

It can cause movement in the wall above if the correct procedures are not followed and the bed joint is not correctly filled.

jollyj1984

stuart45 said:

jollyj1984 said:

Very Interesting, so your saying where the bricks were removed to install the cavity trays it caused the wall to drop or move somewhere? 

Tucker said:

I have seen plenty built without them and I think because they are quite tricky to fit, some take the easy option and don't bother. 

I had the cavity trays fitted in mine but it's not done without problems. I know my bathroom window above the tray never open and closed properly afterwards and it clearly dropped a bit on one side with it being fixed to the outer skin and several courses of brick were removed and refitted below it, so it was obviously unsupported at some point. 

It can cause movement in the wall above if the correct procedures are not followed and the bed joint is not correctly filled.

I'm very quickly going off the idea of retrofitting 😂

stuart45

Only do it if really needed.