toast1 Posted June 7, 2021 Share Posted June 7, 2021 We have a wall that is below the pavement, in a well going down to a basement door. The wall is always wet, due to water behind it. It is brick. Could we put air bricks in the wall, or a tube with holes that would allow the water behind the wall to come out? Perhaps at the bottom of the wall, thus relieving water build up, as this water comes into the below ground rooms. In europe. Thank you Link to comment Share on other sites More sharing options...
Andy from Kent Posted June 7, 2021 Share Posted June 7, 2021 You probably realize you describe great conditions for the growing of Black Mold which is a serious situation. Link to comment Share on other sites More sharing options...
Popular Post sometimewoodworker Posted June 7, 2021 Popular Post Share Posted June 7, 2021 5 hours ago, toast1 said: We have a wall that is below the pavement, in a well going down to a basement door. The wall is always wet, due to water behind it. It is brick. Could we put air bricks in the wall, or a tube with holes that would allow the water behind the wall to come out? Perhaps at the bottom of the wall, thus relieving water build up, as this water comes into the below ground rooms. You certainly can stop the water coming through the wall. A french drain is often part of that prevention. Unfortunately any effective prevention must be done on the outside face of the wall. There is little to nothing thats going to last long you can do to the inside that will do much. 3 Link to comment Share on other sites More sharing options...
sometimewoodworker Posted June 7, 2021 Share Posted June 7, 2021 4 hours ago, Andy from Kent said: You probably realize you describe great conditions for the growing of Black Mold which is a serious situation. Black mold needs a source of cellulose, so that may not be true 1 1 Link to comment Share on other sites More sharing options...
KhaoYai Posted June 8, 2021 Share Posted June 8, 2021 Tanking......................the only way. You can waste your money trying all sorts of fixes but if you want to fix the problem, you need to have in tanked. Explanation below: https://www.petercox.com/specialist-expertise/waterproofing-tanking/walls/ If the problem is severe, you might also have to dig down outside, below the floor level inside and put in a drain. Link to comment Share on other sites More sharing options...
RocketDog Posted June 8, 2021 Share Posted June 8, 2021 9 hours ago, sometimewoodworker said: You certainly can stop the water coming through the wall. A french drain is often part of that prevention. Unfortunately any effective prevention must be done on the outside face of the wall. There is little to nothing thats going to last long you can do to the inside that will do much. Agreed, but a French drain needs a lower place to drain to as well. That by itself could be the real sticking point. 1 Link to comment Share on other sites More sharing options...
sometimewoodworker Posted June 8, 2021 Share Posted June 8, 2021 12 minutes ago, RocketDog said: Agreed, but a French drain needs a lower place to drain to as well. That by itself could be the real sticking point. Not really, as fitting the french drain first requires excavating all the way down the outside of the wall, so tanking can be installed (very expensive) to the correct depth (probably below the footings) and almost certainly a sump pump. Link to comment Share on other sites More sharing options...
RocketDog Posted June 8, 2021 Share Posted June 8, 2021 1 minute ago, sometimewoodworker said: Not really, as fitting the french drain first requires excavating all the way down the outside of the wall, so tanking can be installed (very expensive) to the correct depth (probably below the footings) and almost certainly a sump pump. No doubt that would work, but not appealing. French drains (and the tank) could require periodic cleaning as well, which could be problematic at that depth. Of course a flush system could be installed, etc etc. So much for compulsive engineering! Much more fun to plan than to do. Link to comment Share on other sites More sharing options...
chilly07 Posted June 8, 2021 Share Posted June 8, 2021 You will need a new internal solid wall with a gutter at the lowest level sloped towards an automatic sump pump draining to an outside drain. The new internal wall should be rendered with waterproof render. Don't forget butterfly wall ties between the old wall and new and a 1m return at either end Link to comment Share on other sites More sharing options...
Kinok Powell Posted June 9, 2021 Share Posted June 9, 2021 Any building that is below the outside ground level is a big problem. Air bricks or breathing pipes will do absolutely nothing.The solution is so dig down to below for floor level and "TANK" the outside wall. Lots of new buildings are built with cellars underground in Germany but always tanked. Sorry mate but it will be a dirty costly job that I would only do it it was really important. Maybe cladding your inside wall with aluminium lathes and boarding it over would be a quick fix. Link to comment Share on other sites More sharing options...
toast1 Posted June 9, 2021 Author Share Posted June 9, 2021 Thanks for the info. I can't put in a French drain, thought some air bricks might help the moisture in the wall come out easier. I guess not Link to comment Share on other sites More sharing options...
sometimewoodworker Posted June 9, 2021 Share Posted June 9, 2021 38 minutes ago, toast1 said: Thanks for the info. I can't put in a French drain, thought some air bricks might help the moisture in the wall come out easier. they will. but be like lipstick on a pig Link to comment Share on other sites More sharing options...
canopy Posted June 10, 2021 Share Posted June 10, 2021 22 hours ago, Kinok Powell said: The solution is so dig down to below for floor level and "TANK" Sounds interesting. I am not familiar with the term and don't see search matches. Can you provide any more detail on what this is about? Link to comment Share on other sites More sharing options...
sometimewoodworker Posted June 10, 2021 Share Posted June 10, 2021 (edited) 54 minutes ago, canopy said: Sounds interesting. I am not familiar with the term and don't see search matches. Can you provide any more detail on what this is about? It’s about waterproofing walls mostly under ground the search under works google.com “what is tanking a wall” Edited June 10, 2021 by sometimewoodworker Link to comment Share on other sites More sharing options...
Kinok Powell Posted June 10, 2021 Share Posted June 10, 2021 7 hours ago, canopy said: Sounds interesting. I am not familiar with the term and don't see search matches. Can you provide any more detail on what this is about? I am only a bricklayer and no expert on tanking as the last buildings i tanked were maybe 35 years ago and there will be new methods nowerdays.It has all to happen on the outside face of the damp wall. 1,excavate down to 6 inch below your inside floor level.More if you want to put a land drain in. 2,Dry the wall out from inside. 3,Clean the outside of the wall. 4 Paint the wall with bitumen. 5,Stick on rolls of bitumen paper a bit like wallpaper. 6,Backfill the hole ,re-pave and hope for the best. Good luck. Link to comment Share on other sites More sharing options...
toast1 Posted June 10, 2021 Author Share Posted June 10, 2021 Thanks! Link to comment Share on other sites More sharing options...
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