No Membrane Under Roof Tiles

If the roof abuts to a wall trim the roofing underlay to allow roughly 50mm to go onto the wall.

No membrane under roof tiles.

Two layers of astm 30 pound asphalt impregnated felt is the minimum you should use under tile and should last 20 to 30 years. I am building a garage addition that will connect to tiled decks on th esecond floor the owner wants the tile deck to continue ove rthe garage addition its only gonna be about a 1 2 pitch rafter lenght is 12 feet i was thinking about a 1 2 inch drop since it will be a deck owner wants it flat as possible. Take care to fold the underlay in such a way that no pockets are left which could collect water. They ll be able to withstand heavy outdoor furniture.

According to bs 5534 the british standard for slating and tiling and bs 5250 the code of practice for the control of condensation there are two main types of roofing underlays. Not only because they look good but they re also fairly priced nowadays. One with a simple. Use insolation in between the rafters and then use foiled back plaster boards that will work fine as long as there is ventilation under the tiles which you have because you don t have felt and may.

It has no hard edges to damage the rubber roofing membrane and it will last for 5 10 years under normal use. Let s look at these in more detail. Prevent tiles from being dislodged by assisting with the containment of upward pressure forces in a roof that can build up during storms. That s why we saved the best roof underlayment for tile roofs for last.

I will post this question as well in the tile section. The cost will be higher but the tiles will last much longer. High resistance non breathable underlays and low resistance breathable or vapour permeable membranes. For condos and commercial site you ll want a solid surface rubber tile that is 2 inches or thicker.

30 roofing felt is far better than unrated 30 pound felt which may weigh as little as 15 20 pounds. The tiles are lightweight and easy to install but are not designed for heavy furniture. Prevent the ingress of wind driven rain and dust in roofs that are not 100 waterproof. I have viewed two properties over the last few days that have old roof with no felt until the tiles.

At a hip take the underlay from the first side around the corner then overlap from the second side by approximately 150mm. Under tile membranes the main purpose of under tile plastic membrane is to.