Closed Cell Vs Open Cell In Attic In Southern Climate

Kit 43 cubic ft.

Closed cell vs open cell in attic in southern climate.

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. Senior editor martin holladay replies. Fire rated e84 kit 605 sf coverage. Open cell should be at least 6 inches in depth and closed cell 4 inches or more of each depending on local code.

Cavity fill slow rise. Can be applied at very low temperatures as low as 5of. Closed cell spray foam exterior applications. The cells are pressed together so air and mositure are unable to get inside the foam.

Closed cell foam can also increase the racking strength of attic walls which. 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. This makes the foam a softer more flexable material. With the open cell vs.

In other words the cells are deliberatly left open. It is either open cell foam where the tiny cells of the foam are not completely closed. When applied on the interior open cell spray insulation provides performance advantages that differ from those of closed cell spray foam used on the exterior. Architectural firms can specify both the building envelope for a total performance option.

280dc uv protecting paint for foam. 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 foam is made up of cells that are as the name suggests completely closed. Kit 340 sf coverage.

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. It also will perform better below or above grade. 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. Open cell foam is full of cells that aren t completely encapsulated.

Closed cell issue there are two major factors to understand and consider. Quick cure best seller kit 605 sf coverage best seller kit 205 sf coverage. Kit 60 sf coverage. Kit 205 sf coverage.

The first is the nature of the foam.