Basement ducts and pipes.

Ducts and Pipes. Dos and Don'ts. It is actually very simple. The outside of a pipe or duct is easily waterproofed as it penetrates reinforced concrete. The inside of a duct is extremely hard and could be very expensive to waterproof inside around cables and so on. The flange in this photo is made with Denso tape, that the gas network uses to wrap round its pipes in the ground.   I saw these at the Build exhibition in Munich. I have seen others as well. The lesson has to be route the duct to prevent ingress of water.   This is a link to a British supplier You cannot reliably waterproof inside a duct for a reasonable cost. One solution someone came up with. After the excess is cut off, it would seem simple to spray expanding foam inside to stop a draught or cold bridge.

Back to the Basement Building Questions Answered menu.

Back to the Basement Building Construction Manual menu.

For a fixed fee of £199 I will answer all your questions by email. More details here.