Foam Roofing Goes On Top Of

Spf roofs are installed by spraying a liquid on the existing roof and allowing it to expand into a foam.

Foam roofing goes on top of.

Spray foam roofing spf is an excellent choice for a flat roof because of its insulation properties and seamlessness. If small holes to the foam roof occur because of equipment or damage from people walking on it you can usually calk it to prevent it from spreading. Make sure all seams are properly lapped. Create an unvented roof putting foam on top of the sheathing.

Put down roof felt. It has a long lifespan if its been installed correctly which takes skill and special equipment for the project. From what i ve learned here seal the seams of the osb roof sheathing with zip system tape to create an air tight barrier. Put full sheets of 2 foam on top of the sheathing and felt tacked in place.

Polyurethane foam roofing consists of a protective coat layer and a foam layer on top of a substrate. A second recoat is generally necessary only 25 years after the roof s installation. Recoating your foam roof will cost about 25 of the original cost. Most home and business owners opt for rigid foam on top of roof sheathing because it makes the most sense and it s an eco friendly solution.

One of the most efficient and popular methods though is to install rigid foam insulation on top of roof sheathing. There are three options for an air control membrane installed on top of the roof sheathing these are listed relative to air control and temporary back up water control performance. It makes the most sense and preforms the best under most conditions. If you use bubble foil or rigid foam insulation it also goes on top of the moisture barrier.

The foil insulation goes on top of the moisture barrier followed by the roof covering. Foam roofing is applied using a liquid chemical that expands to over 20 30 times the volume of the original liquid. It s a simple combination of materials that differs greatly from traditional roofing in terms of time and expertise. This process means that the foam can conform to all roof shapes and types even irregularly shaped roofs.

My roofing is steel and is designed to be mounted on battens purlins. Good non adhered roof underlayment made air tight with taped seams and air tight connections to the air control of adjacent assemblies.