Closed Cell Vs Open Cell In Attic In Southern Climate

In other words the cells are deliberatly left open.

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. 280dc uv protecting paint for foam. Kit 43 cubic ft. Can be applied at very low temperatures as low as 5of.

Kit 205 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. Kit 60 sf coverage. Closed cell foam is made up of cells that are as the name suggests 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. It also will perform better below or above grade. 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. It is either open cell foam where the tiny cells of the foam are not completely closed.

Closed cell foam can also increase the racking strength of attic walls which. Kit 105 sf coverage. Open cell foam is full of cells that aren t completely encapsulated. Closed cell spray foam exterior applications.

Quick cure best seller kit 605 sf coverage best seller kit 205 sf coverage. With the open cell vs. Cavity fill slow rise. They are broken and air fills all of the open space inside the material.

Closed cell issue there are two major factors to understand and consider. Architectural firms can specify both the building envelope for a total performance option. Closed cell foam has a higher r value per inch and is vapor impermeable. Fire rated e84 kit 605 sf coverage.

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. 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. Kit 340 sf coverage. The first is the nature of the foam.

Senior editor martin holladay replies.