Garage Floor - Wet in Winter

[bgordon65]

Hello all,

I have a problem with water appearing in my garage during the winter.

Background:

• The structure is a double garage (North side) with two roller doors at one side, and a single door at the opposite corner (South).
• The garage roller doors are sealed using a rubber door seal (https://www.weatherstop.co.uk/produ...MIj_6R66rO5wIVg7TtCh1_zA7tEAQYBSABEgJR7_D_BwE). This worked really well and stopped water being blown in. .
• The base is concrete. I am not sure of the type.
• There's a damp course all the way round, one brick up.
  
• The earth around slopes from North to South. Externally, the concrete base is level with the earth at the North side and sits proud at the South end by 1ft.
• Inside the garage, there is no run in the concrete, it's level.
• Guttering on either end runs into two down pipes on the South side. The down pipes run into soak away drains, 1 meter deep and filled with gravel.

Problem:

During winter, in heavy rain, water pools at the South end of the garage. Up to half an inch in places. It tends to happen during the first bout of rain and then typically it'll stay wet until the weather improves.

I have had the roof checked, and replaced the wooden walk in door with a rubber sealed PVC door. The bricks are not visibly wet where the brick meets the concrete other than where the water has pooled up.

From what I have read it could be possible ground water is rising from beneath the concrete.

Solution?

In the summer time I am thinking about emptying the garage coating the floor with tanking slurry, some thing similar to this:
https://www.permagard.co.uk/advice/tanking-a-cellar-guid

Or, going with an Epoxy Damp Proof membrane:

https://www.watco.co.uk/products/watco-epoxy-damp-proof-membrane

Generally looking for some advice / feedback. Will these products hold back the water, and if so, presumably the water will want to run elsewhere.

 

[bgordon65]

Any thoughts?

 

[Nige F]

Strange that the water is pooling @ the end where the floor is above outside ground level . No signs that it's sneaking in @ the N. side and creeping along ? As to the soakaways - they might be inadequate and back up during the first rain . As there is a foot of brickwork exposed @ the S end under the floor you could take a brick out and see if water comes out during rain. Also make a way to check the water in the rainwater drain - where the downpipe goes in. An odd one !