I'll ask simpler questions here as the length of the post may have been a deterrent.
Is it possible to waterproof a roof with elevated wooden fences in the way? With liquid waterproofing for example, by painting it/applying it around the base/poles?
For more context, I moved the lengthy description to the second post
Edit: here are some more questions:
- am I right in that it was a mistake to have material bridging the two structures, and so this has to go?
- the flat roof has square paving stones on top. Is it a fair assumption that that's not waterproof, and any waterproofing is done by the layer underneath (presumably bitumen)?
- if we put new flashings starting under the waterproof bitumen layer, wide enough to end over the sedum roof, do we need copings underneath as well, or having the membrane hanging over the edge into the gap under these new flashings is enough?
- it is better to put guttering instead around the flat roof edges instead of flashings, with a single pipe at the corner discharging the water onto the sedum roof?
- if we use code 5 lead flashing, 600mm wide, what's max length for each section and how much overlapping?
Is it possible to waterproof a roof with elevated wooden fences in the way? With liquid waterproofing for example, by painting it/applying it around the base/poles?
For more context, I moved the lengthy description to the second post
Edit: here are some more questions:
- am I right in that it was a mistake to have material bridging the two structures, and so this has to go?
- the flat roof has square paving stones on top. Is it a fair assumption that that's not waterproof, and any waterproofing is done by the layer underneath (presumably bitumen)?
- if we put new flashings starting under the waterproof bitumen layer, wide enough to end over the sedum roof, do we need copings underneath as well, or having the membrane hanging over the edge into the gap under these new flashings is enough?
- it is better to put guttering instead around the flat roof edges instead of flashings, with a single pipe at the corner discharging the water onto the sedum roof?
- if we use code 5 lead flashing, 600mm wide, what's max length for each section and how much overlapping?
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