I'm working on damp-proofing my garage. The problem is that the previous owner laid a concrete path outside the garage wall which is 8cm higher than the damp-proof-course. This is causing damp to come in from the concrete and the DPC I have is too low down to stop it.
I am wondering if this solution will work: put a new DPC above the level of the concrete slab to stop any damp rising up, and to paint on a flexible, rubberised bitumen layer (like http://www.toolstation.com/shop/p33714) below this to stop any damp coming through.
Hopefully these few photos will show what I mean - what is there at the moment and what I am thinking of doing.
![outside.png outside.png](https://cdn.diynot.com/data/attachments/93/93522-2346c7ed60fa22b4d24b8c23272bf04d.jpg)
![now.png now.png](https://cdn.diynot.com/data/attachments/93/93521-059dc09e2aa568b81a523917789af844.jpg)
![planned.png planned.png](https://cdn.diynot.com/data/attachments/93/93523-b988b56d86f0b37eb92e62e5fafa8c08.jpg)
I am wondering if this solution will work: put a new DPC above the level of the concrete slab to stop any damp rising up, and to paint on a flexible, rubberised bitumen layer (like http://www.toolstation.com/shop/p33714) below this to stop any damp coming through.
Hopefully these few photos will show what I mean - what is there at the moment and what I am thinking of doing.
![outside.png outside.png](https://cdn.diynot.com/data/attachments/93/93522-2346c7ed60fa22b4d24b8c23272bf04d.jpg)
![now.png now.png](https://cdn.diynot.com/data/attachments/93/93521-059dc09e2aa568b81a523917789af844.jpg)
![planned.png planned.png](https://cdn.diynot.com/data/attachments/93/93523-b988b56d86f0b37eb92e62e5fafa8c08.jpg)