How do you Fix leaky block wall?

Answer 1

first find the source of the groundwater entering the structure. look for overflowing gutter, downspouts, places where sidewalks and terrain channel water to the structure. this is usually the problem,

as for the block, knowing the nature of the material will provide some insight into how it responds to water. cinder block will actually absord a great deal of water from the ground. it will act like a sponge and with enough water and time it will actually flow through the cinderblock.

1, If your situation is just a little moisture or dampness there are a bunch of water sealing paints sold at sherwin Williams or diy stores that will work. if there is any loose or pealing paint it should be removed dried with a fan then painted.

Please note when scraping paint it is possible that the paint your scraping could have lead in it, so be careful not to breath it in by wearing a good resporater and clean up debris with soapy water.

2, if there are holes or cracks in the block, hydraulic cement can be used to fix them on a day when it's not leaking. be carefull because if it's a lot of water and in your climate zone trapping this water in the cells of the block in freeze thaw freeze thaw cycles could actually create a much worse, problem by damaging the block.but usually if its th boton course of block it's most likely be okay to do.

3 if you have water pouring across the floor, and you have made sure that there are no gutter and downspout, sidewalk, or terrain issues the only really wise thing to do would be to add weepholes and divert the water with black eggcrate plastic to a drain of you choosing.

if this wasn't helpfull i'd be glad to add more, if you could be more specific about your problem. i'd be glad to revisit this.