Any knowledgeable people, can you please check my plans?
I have a small (2.5x2.5m) Victorian cellar under part of my house. The walls have no built in damp proofing (just double skin brick) although c. 20 years ago had damp proofing injected in the 3rd course above ground level. This is performing well. The walls below ground level are not suffering with damp so long as they are kept ventilated.
The floor is bricks laid directly onto earth, which has a brick lined sump in one side. The floor remains damp all year and in the depths of a damp winter we get a few inches of water in the sump.
I am building a raised floor away from the walls so we can use the room for a boiler and water tank without getting damp from the floor, but the air humidity is still 80-90% so I want to reduce the damp in the floor.
My plan is as per below: install French drains around the 4 perimeter walls to drain to the sump and pump to the mains drainage. Run a DPM between the drainage and lay sand on top to bed the bricks back down. This is a listed house so I don't want to lay concrete so I think cutting the DPM short of the walls will still move the moisture from beneath the drains, without the risk of forcing moisture up the walls and allow any moisture on the floor to drain down if necessary.
Any recommendations gratefully appreciated. Thank you!
I have a small (2.5x2.5m) Victorian cellar under part of my house. The walls have no built in damp proofing (just double skin brick) although c. 20 years ago had damp proofing injected in the 3rd course above ground level. This is performing well. The walls below ground level are not suffering with damp so long as they are kept ventilated.
The floor is bricks laid directly onto earth, which has a brick lined sump in one side. The floor remains damp all year and in the depths of a damp winter we get a few inches of water in the sump.
I am building a raised floor away from the walls so we can use the room for a boiler and water tank without getting damp from the floor, but the air humidity is still 80-90% so I want to reduce the damp in the floor.
My plan is as per below: install French drains around the 4 perimeter walls to drain to the sump and pump to the mains drainage. Run a DPM between the drainage and lay sand on top to bed the bricks back down. This is a listed house so I don't want to lay concrete so I think cutting the DPM short of the walls will still move the moisture from beneath the drains, without the risk of forcing moisture up the walls and allow any moisture on the floor to drain down if necessary.
Any recommendations gratefully appreciated. Thank you!
