Water penetration at base of garage (Ed.)

[sanderson8322]

Hi,

I bought a house, thought a 9 meter long garage was a bonus - It's a total disaster though.

The felt roof leaks which is not too bad, it must be 10 years overdue replacing. Just going to stick box profile roofing on it.

What took me by surprise if that the garage leaks from the bottom. Water seems to seep in from the join between the bricks and the concrete base. Assume it's a dodgy build, I can see where people have tried to fix this for themselves with what looks like tanking slurry. Bits of this are just crumbling away at the moment.

My question is how would you go about resolving the leak at base level?

Initial thought was a new DPM and raise the floor by 1-2 inches with fresh concrete. Not sure if this would work though, just basing it off a you tube video I saw.

Any advice or success Tories with similar issues would be appreciated.

 

[Notch7]

What took me by surprise if that the garage leaks from the bottom. Water seems to seep in from the join between the bricks and the concrete base.

external images are important for advice on this

 

[sanderson8322]

Hi,

Thanks for the quick response. I forgot to upload the externals.

I have access to the back of the garage and already excavates a two foot trench to see if this reduces the issue but it made no difference. The other side has a narrow gap before a neighbour's fence, no access is possible here.

Stephen.

 

[geraldthehamster]

I have a smiliar issue with a brick garage built on a concrete slab that extends outside the garage. I'm going to install either a DPM or liquid DPM, taken slightly up the walls, and screed it with 3 inches of concrete

 

[Deleted member 292770]

you need to dig 6” lower than the top of the slab and lay a doubled up membrane along the length up to the dpc level. also cut a cheap lead substitute into the cement 1 course higher than the dpc and lap it over the membrane. then bank the earth back up over it to hold the membrane in place.
The fence is just a fence . get their permission to remove and rebuild it.

 

[sanderson8322]

I have a smiliar issue with a brick garage built on a concrete slab that extends outside the garage. I'm going to install either a DPM or liquid DPM, taken slightly up the walls, and screed it with 3 inches of concrete

Just wondering if you got this done before me and if so how did it go?

I ended up getting sick and only just coming back to it now.