Ready to hire?

Post your job in minutes, browse real reviews and choose who to speak to.Post a job

Need some tips or advice?

Groundwork & Foundations

Water in sub-floor after heavy rain

Anonymous user 03/03/2024 - 3.08 PM

I live in a 1950s semi-detached house. Following recent very heavy rain there is 1 inch of standing water in the subfloor void. It seems to rise slightly after very heavy rain, I've never seen it rise above an inch or so, and during dry spells there's no water there. The floor is timber construction with joists, roughly 1 foot sub floor space, and I'm pretty sure there's a concrete oversite. I'd say the sub-floor oversite is about 6 inches lower than the outside ground level. I want to start investigating how the water is getting into the sub-floor void, but don't really know where to start. Ideas: Guttering issue? Underground drainage issue? Just a general high water table (this is in York afterall)...? Anty advice appreciated.

Are you a tradesperson and able to answer this question?

1 Answer

Rowan Groundworks Ltd

Rating: 5 out of 5

Wellingborough

1) Check that the down pipes are not blocked and the connection to the drains is free. 2) If the connection are going into soakaways these could have had their day and want renewing, a small hole in top of pipe and a cctv camera will tell you what is happening or not. 3) One good way to see what is happening is to excavate say at the each corner of the house down to the foundation level and monitor what happens when it rains, if these fill with water one of the above is not working or you need a french drain to relieve the pressure away and lower than your sub-floor, which incidently should not be lower than the external ground Hope this helps, Peter

Answered6 June 2014