How To Felt A Flat Concrete Roof

The felt has failed at the junction with the house it was tucked under the upper storey cladding but has come away but as the house has has wide eaves it only leaks if the wind is blowing strongly from the north east while it s raining.

How to felt a flat concrete roof.

When there are leaks in a flat concrete roof the fast fix is usually to apply some kind of sealant or waterproof cement at the site of the leak. Felt is laid on a flat roof to help keep the roofing system waterproof. The best time to lay a felt roof using cold applied adhesive is when the weather is warm but this means that working on a flat roof can be exhausting work with the sun s heat and the heat reflected from the felt already laid. Prime the concrete with a bitumen primer then install a 3 layer felt system.

The most common complaint with regard to both concrete tile and flat concrete roofing is water leaks. Here are simple steps to get you started. Exact specifications vary but most concrete roofs are several inches thick. Materials for felting a flat roof.

Lay a 11mm ply over the deck fix and secure with screwing the decking down. Don t forget to replace roofing felt. This will give a good 15 20 years if done correctly. This is a good diy weekend project requiring only a few basic materials.

A concrete roof is exactly what it sounds like. Newer flat roofs on the other hand are often made of rubber. Step 1 prep work. Leaks in concrete tiles can often be fixed by replacing.

Flat concrete roofs as they are locally constructed have a number of issues. Check to ensure the roof is in good enough condition to walk over. Use asphalt gravel or cap sheet on top of the felt if necessary and follow manufacturer instructions for the particular material. It s a single storey structure attached to the main house with a flat concrete roof sealed with bitumen felt.

The walls must be built strong enough to support it. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. The rolls of felt are quite heavy and to avoid damage must be handled with care. While felting a flat roof is not a particularly complex project it does require some patience and perseverance to make sure that the felt goes on smoothly and evenly.

While laying felt is not an easy job it can be done by anyone who has the patience to deal with it. The first thing to note is that it is the reinforced concrete slab not the screed that keeps the water out. Lay a epdm rubber roof this i would say is the best method. A solid slab of concrete capping the top of your house.