How To Felt A Concrete Flat Roof

You will be placing the second layer of felt over this.

How to felt a concrete flat roof.

Prepare the third layer. Exact specifications vary but most concrete roofs are several inches thick. Add the third layer. It s best to start nailing in the center and work out from there.

The substance itself is made from bitumen which comes from the distillation of crude oil that has been either mixed with sand or crushed limestone. Following the manufacturer s instructions apply the adhesive to the first nailed layer. Prime the concrete with a bitumen primer then install a 3 layer felt system. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers.

You wan walk over the roof to remove any air bubbles that may form. There are 3 ways to do this type of roof. To insulate a flat roof with a concrete deck we recommend a warm deck construction method where the vapour control layer is sandwiched between the concrete deck and a layer of rigid pir insulation boards. 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.

Permanent flat roof repair if the crack is obvious and the surface isn t rough a small patch of torch on roofing felt can work well often a layer on top of the concrete roof is favourable and a relatively low cost solution see picture below. Prepare the second layer. 1 materials for felting a flat roof. Bituminous felt is a form of waterproof sheeting that is used to cover flat roofs or as an underlay beneath slate or tile roofing.

Roll out the felt. Align measure and cut it to length. 2 step by step guide for felting a flat roof. Paint a thin layer of adhesive over the first felt layer.

A solid slab of concrete capping the top of your house. The concrete deck can offer greater speed of roof construction which is an important consideration on many larger commercial projects. Add the second layer. There needs to be an overlap in the felt to help increase the water tight quality.

Repeat until roof is covered. A concrete roof is exactly what it sounds like. It s a single storey structure attached to the main house with a flat concrete roof sealed with bitumen felt.