”The issue around the guttering was not actually the gutters themselves but that the membrane under the deck reached the end of its lifespan which caused water to flow between the gutters and the side of the property below. As I mentioned the owners have undergone extensive remedial work to not only fix that issue but completely renovate the decking and balustrades which has added significant value to the property.“
”I also did some research about roof-top waterproof decks. It seems that such a deck installed over habitable spaces, tends to incorporate a waterproof membrane that is installed over a timber substrate. They have a high risk of weathertightness failure as they are really just a low pitch roof surface that can collect substantial amounts of water that needs to be drained. Any leak through them may result in water entering directly into the building. The larger size and the complex design (internal gutter, drainage scuppers and solid handrails) are hassles, unless they are open-ended waterproof decks, other than fully enclosed decks. “