I've got a flat asphalt roof terrace on a slight incline, then a section at one end that runs down at 45 degrees to a drain for a couple of feet.
It's about 20 years old, and it's been leaking intermittently for a few years.
I've painted it with various 'liquid tar' type products that have helped a bit, and we've had workmen into who have identified and fixed specific some problems (e.g. where a pipe comes through), but it seems now to be a general problem that it's reached the end of its life and needs a bigger job.
Looking around the internet I've seen some very conflicting guidance. The roof seems solid and stable, so would it be possible to:
- Put felt on top of the existing asphalt? - Add a layer of new asphalt? - Would all the old asphalt need to be taken up and replaced entirely?
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