Foam Roofing Goes On Top Of

From what i ve learned here seal the seams of the osb roof sheathing with zip system tape to create an air tight barrier.

Foam roofing goes on top of.

My roofing is steel and is designed to be mounted on battens purlins. This process means that the foam can conform to all roof shapes and types even irregularly shaped roofs. It has a long lifespan if its been installed correctly which takes skill and special equipment for the project. While spf roofing is not the most known type of roofing material the technology has been around since the early 1960s for industrial commercial.

Spray foam roofing spf is an excellent choice for a flat roof because of its insulation properties and seamlessness. Recoating your foam roof will cost about 25 of the original cost. Put down roof felt. 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.

Spf roofs are installed by spraying a liquid on the existing roof and allowing it to expand into a foam. Make sure all seams are properly lapped. After cleaning the existing roof the spf roof can be applied directly over asphalt shingles concrete metal and wood. Put full sheets of 2 foam on top of the sheathing and felt tacked in place.

It s a simple combination of materials that differs greatly from traditional roofing in terms of time and expertise. 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. 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. It makes the most sense and preforms the best under most conditions.

A second recoat is generally necessary only 25 years after the roof s installation. Foam roofing is applied using a liquid chemical that expands to over 20 30 times the volume of the original liquid. One of the most efficient and popular methods though is to install rigid foam insulation on top of roof sheathing. The foil insulation goes on top of the moisture barrier followed by the roof covering.

Create an unvented roof putting foam on top of the sheathing. If you use bubble foil or rigid foam insulation it also goes on top of the moisture barrier.