Garage walls leaking

[David Mclean]

Hello 

 

Got a garage that is leaking water through the walls, get big damp patches then when it rains hard it will pool on the floor.

 

I have tools/classic car etc etc inside and need to solve this asap, I have seen products like Permagard do they work?

 

Is something like Permagard going to fix this or do I need to look at some sort of external cladding?   

 

Any ideas of first hand experience much appreciated 

[Onoff]

What's going on outside then, ground too high, water splashing up, gutter running down?

 

What type of Ford is it then? 

[David Mclean]

Hello 

 

Sorry I should have put a bit more info, flat roof, no gutting, its a single wall construction, its got one area where the earth is above the DPC but ironically thats the driest area.

 

Can do a photo of the outside if that helps  

[MortarThePoint]

Do you think the water is just penetrating the wall or is there a leaking gutter, roof etc. Waterbutts can create real problems if not done carefully as my inlaws had an issue with theirs.

 

You may want to get a dehumidifier in there whilst you sort something out

[David Mclean]

My gut feeling is its coming through the wall, dehumidifier in already.

[Onoff]

When it pools on the floor does it come in through the damp patch in the picture and run down, or does it come in at the base of the wall?

 

No guttering...so is there water running down the outside of the wall (from the roof) when it rains?

[MortarThePoint]

2 minutes ago, David Mclean said:

My gut feeling is its coming through the wall, dehumidifier in already.

 

An outside shot would help then as different finishes will likely call for different approaches

[David Mclean]

4 minutes ago, Onoff said:

When it pools on the floor does it come in through the damp patch in the picture and run down, or does it come in at the base of the wall?

 

No guttering...so is there water running down the outside of the wall (from the roof) when it rains?

Yes 

 

Flat roof with a lip round the edge,  drain in one corner...

 

Will do some more photos in the morning  

[Conor]

Is the wall rendered? My single skin shed had damp patches galore until I put a scratch coat on, solved it straight away.

 

And external masonry paint helps a lot.

Edited January 31, 2021 by Conor

[Temp]

Single skin brick walls can be very porous. +1 to render or cladding. May need planning permission? 

Edited February 1, 2021 by Temp

[David Mclean]

[David Mclean]

Any thoughts?

[Onoff]

I'd try say a water seal like Everbuild 402 Water Seal. Cheap enough.

[David Mclean]

Hmmmm 

 

I tried this and it has made the slightest difference 

 

https://www.screwfix.com/p/no-nonsense-water-repellent-seal-clear-5ltr/57474?tc=NA9&ds_kid=92700058024393117&ds_rl=1249407&ds_rl=1241687&ds_rl=1245250&ds_rl=1245250&gclid=CjwKCAiAsaOBBhA4EiwAo0_AnMgYOAI1Vupw34NYn3jvvb8H9peYJ7Ze3Qu_4qW9bZw7UsNuT3k_lBoCrnEQAvD_BwE&gclsrc=aw.ds

[mvincentd]

The mortar between your blocks can suck water through like a sponge, as can the blocks to a lesser extent.  This is the easy obvious explanation.  For zero cosmetic change externally try a masonry cream, a step up in price from screw fix/everbuild/thompsons waterseal but you get what you pay for.

http://www.stormdry.com

 

If you can stand a cosmetic change externally http://www.renotex.co.uk/renotex_rollercoat.php I used this over failing render 4 years ago in economic preference at the time to replacing the render and it's still good.....quite a sticky mess to work with though.

 

[David Mclean]

Thanks for the info, I have looked at Stormdry and Permagard as they seemed to be pretty similar products, was hoping for someone with some first hand experience in using one of them.   

 

As you say you get what you pay for!

 

 

 https://www.permagard.co.uk/microshield-ultra-masonry-waterproofing-cream

[joe90]

I used this on my west facing brick wall near the Atlantic and it was easy to use, and did a brilliant job with one coat. Tested it when dry with a hose and water ran off it like glass. ?. https://www.kingfisheruk.com/superseal-professional-water-seal-item-73#73a