Question
Hello! I will go straight to the heart of the matter. At the final stage of the work, apparently, the waterproofing on the roof of the metal tile was inaccurately laid, and it broke. What to do now, is it really to start all over again? (October 01, 2013, Oksana)
Answer
The situation is rather complicated. If it happened as in your case, then here, most likely, there will be only one way out. It would not be desirable, but you will have to disassemble everything and re-lay the waterproofing membrane, since it is not possible to glue it.
Of course, it’s a pity that it happened, but apparently there is no other way. Since it is waterproofing that protects the inside of the roof from getting inside rain and snow, it is in your interests not to be too lazy and do everything according to the rules so that your roof serves for a long and reliable.
By the way, the installation of a waterproofing film, in fact, is not such a difficult thing. You just need to adhere to the manufacturer's instructions or use the advice of specialists on our website.
The film should be laid strictly horizontally (from one edge of the roof to the other). In this case, a small "overlap" should be carried out, at least 15 centimeters. Fastening should be done on the rafter system, you can use a building stapler for fastening. In those places where there is an "overlap", you need to go with duct tape.
Laying should be done so that in places where there is an "overlap", wooden structures must be present.
An important point is that between the rafter system and the film itself there should be a small gap (about 2 centimeters), and the film should sag a little (both from one side and the other). This is necessary so that there is not too much tension on the film, and so that it does not tear (which, most likely, happened in your case).
Confusing the sides of the waterproofing membrane is highly discouraged. If a bright tape runs along the edge of the waterproofing film, then you need to lay it to the roofing with this side. In this case, the roofing cake will be ineffective, as it will work incorrectly.
As you can see, laying a waterproofing film is not something super complicated. Everyone can do such a procedure. But it is important to observe the installation technology, since only in this case can the operability of the entire roofing structure be guaranteed, and the house will warm you and your friends with warmth!
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