ex council house outside store roof 100mm thick concrete area about 4m x 3
has rasied front and sides (a lip about 25mm high)
Never been felted
Looking at the fibrous paints or other low cost solution
Having read all the other posts since my reply this am, I would also
recommend the cromapol product or there's another called aquapol, I
think... Check out JJ Roofing supplies or Wedge roofing, but again, it's
not cheap- about £90 a tin retail, £60 trade. For a cheaper way of
remedying it as a trial.... If you can find the crack get a tube of Sika
and use that to fill the joint, it's great stuff.
What else are opposable thumbs for? Get to me at
The usual solution in places like Italy where flat concrete roofs are
normal is to lay a waterproof screed on the roof. This requires the roof
to be clean and dry before you start.
Sounds identical to one I did myself once. IIRC I used bitumen paint as
a cheapo solution, as I knew I'd be selling the place not long afterwards.
Seemed to do the job well enough; I can't vouch for it's longevity but
think if I'd been intending on keeping the property for a long time I'd
have chosen something more durable. Indeed, the purchaser's surveyor
flagged it as a future maintenance issue.
yeah. Concrete itself is pretty impervious, depending on the grade.
Anything that soaks in a bit of a plasticky or tarry nature will improve
Probably one of those render waterproofers will do.
having atempted all of the suggestions in this thread over the past thirty
years, I have found only one solution and that is to use a product called
I've done a few concrete rooves with this and had no problems at all, it's
expensive, because it works.
Don't bother with anything available from B&Q et al, they also have
expensive sealants, but none of them work on cracked concrete
It's available in black, white and grey
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