Greetings...! I'm fixing up an old wooden house. Oak beams laid onto a brick course, no damp proof membrane. An internal concrete floor was poured over the compacted dirt floor in the late 1980s - again no damp proofing. I've got holes around some of the sides of the floor/ground beams - where the beam has rotted away/mice have entered. I have attached photographs. My plan is to clean out as much loose rotten wood/dirt from the holes, and then pour in a thin layer of cement. Then paint the whole floor with the liquid bitumen, then with a butane heat lance and bitumen roll - install a fresh, new damp proof membrane. I am sure that after I have installed roof gutters and weatherproofed the exterior foundation - from penetration rain (the brick course currently has a layer of concrete on it) - the dampness in the land will be improved.
Thanks for your reply! The beams were laid on top of a couple of rows of solid bricks. Extremely difficult to get access to, without a huge cost. The poured concrete isn't really in a bad condition - but does need to be water proofed. I'm going to clear around the perimeter of the house, dig down a bit, dump broken tiles and then concrete over. I have found that although the septic tank runoff goes into the ditch in front of house, the other bathroom/kitchen sinks empty via individual drain pipes onto the land right next to the side of the house. My mission - to capture rainfall from roof into water storage tanks, and dredge my ditch to keep flow of water away from property.
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