Moonshine Posted March 7, 2020 Share Posted March 7, 2020 I am looking to replace cavity trays on my house where it's suspected that the tray (bitumen I think) has failed. I am looking to use 450mm type E trays, which, you only need to take 3 bricks out at a time to fit. The question I have house far over the window do they need to go. E.g a 900mm window, does the length of cavity tray need to be min 100mm longer either side (1100mm total) Link to comment Share on other sites More sharing options...
PeterW Posted March 7, 2020 Share Posted March 7, 2020 150mm is the norm but tend to go up to a brick further. Link to comment Share on other sites More sharing options...
nod Posted March 7, 2020 Share Posted March 7, 2020 I did them on one of our rentals and hired a brick saw for the day from Smiths rather than using an angle grinder Cuts through like butter Less mess and much quicker and neater Link to comment Share on other sites More sharing options...
Mr Punter Posted March 7, 2020 Share Posted March 7, 2020 You could try just painting the wall above with StormDry, which is supposed to last 25 years. 1 Link to comment Share on other sites More sharing options...
Oz07 Posted March 7, 2020 Share Posted March 7, 2020 Those saws are supposed to be the mutts nuts for patching Link to comment Share on other sites More sharing options...
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