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Looking to upgrade with s type control pack to control hot water and rads separately and would like to know the difference between the available control packs for vented and un-vented. i understand the difference between vented and unvented system but what is the difference between the...

Hi, Have a block cavity wall extension waiting for roof to go on. Just wondering what the best option is for rafter tails. (sketch attached) The roof angle means the tails of the rafters will cut through the cavity wall closing block. Looking at it seems to make sense to me to cut the rafter...

Is it is easy to recover 50-60mm? Solid block footing 320mm wide just went in on new house extension and parallel walls are off square by 50-60mm Foundation is 900mm wide -footing are solid block (215x440x100mm) next part of build is cavity wall on top of footings = 2 x 100mm blocks...