void between two concrete slabs. Drainage pipes, concrete, footings and foundations. Post your questions and find answers here

[baldymark]

i have recently had an extension built on back of my house, wot i am trying to find out is how do i fill the gap in the existing cavity at floor level after i take out the patio doors, would i need to put a DPC though.

[stoneyboy]

baldymark,
If you have the depth cut the internal wall below floor level fit a cavity closer and concrete on top to reinstate the floor level. Keep dpcs intact.
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