Closed Cell Vs Open Cell In Attic In Southern Climate

With the open cell vs.

Closed cell vs open cell in attic in southern climate.

Fire rated e84 kit 605 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. Closed cell spray foam exterior applications. Open cell foam is full of cells that aren t completely encapsulated.

In other words the cells are deliberatly left open. Kit 43 cubic ft. 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. Can be applied at very low temperatures as low as 5of.

Kit 60 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. Open cell should be at least 6 inches in depth and closed cell 4 inches or more of each depending on local code. Senior editor martin holladay replies.

Kit 340 sf coverage. Quick cure best seller kit 605 sf coverage best seller kit 205 sf coverage. The cells are pressed together so air and mositure are unable to get inside the foam. Closed cell foam has a higher r value per inch and is vapor impermeable.

Kit 105 sf coverage. It also will perform better below or above grade. Kit 205 sf coverage. 280dc uv protecting paint for foam.

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. This makes the foam a softer more flexable material. Closed cell foam is made up of cells that are as the name suggests completely closed. Cavity fill slow rise.

It is either open cell foam where the tiny cells of the foam are not completely closed. They are broken and air fills all of the open space inside the material. The first is the nature of the foam. 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 issue there are two major factors to understand and consider.