Closed Cell Vs Open Cell In Attic In Southern Climate

They are broken and air fills all of the open space inside the material.

Closed cell vs open cell in attic in southern climate.

Closed cell foam can also increase the racking strength of attic walls which. Open cell foam has an r value of about 3 5 to 3 7 per inch while closed cell foam has an r value of about 6 per inch. Architectural firms can specify both the building envelope for a total performance option. The cells are pressed together so air and mositure are unable to get inside the foam.

Senior editor martin holladay replies. Kit 205 sf coverage. With the open cell vs. Fire rated e84 kit 605 sf coverage.

Open cell foam is full of cells that aren t completely encapsulated. It is either open cell foam where the tiny cells of the foam are not completely closed. Open cell should be at least 6 inches in depth and closed cell 4 inches or more of each depending on local code. Kit 43 cubic ft.

Kit 60 sf coverage. It also will perform better below or above grade. A spray insulation is referred to open cell or closed cell because of the difference between the small bubbles cells that make up the foam. Closed cell issue there are two major factors to understand and consider.

In other words the cells are deliberatly left open. Closed cell foam is made up of cells that are as the name suggests completely closed. The first is the nature of the foam. If you do not use the attic for a habitable purpose you might want to keep your thermal barrier on the floor of the attic.

Closed cell foam has a higher r value per inch and is vapor impermeable. Kit 340 sf coverage. Cavity fill slow rise. Can be applied at very low temperatures as low as 5of.

Quick cure best seller kit 605 sf coverage best seller kit 205 sf coverage. In unvented roof assemblies open cell foam has been associated with damp roof sheathing and sheathing rot so closed cell foam is usually preferred for this application. Closed cell spray foam exterior applications. Kit 105 sf coverage.

Open cell is a lower cost alternative for basements in cold climates closed cell is preferable in parts of your home that are vulnerable to flooding hot and humid climates zones 1 thru 4 roof attic exterior walls.