Attic Sheathing Insulation

In the vast majority of cases the mold growth is caused by condensation.

Attic sheathing insulation.

This retrofit assembly is appropriate for homes with conditioned attics or where the retrofit is intended to create a conditioned attic. Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.

The quick pace has proven to be quite auspicious as the typical summer monsoon storm systems begin to play out in southwestern new mexico. Install insulating sheathing above the roof deck on existing homes. Nick an owner builder pal of mine helped me put up the insulation and sheathing over the course. Installing the attic insulation and roof sheathing went much faster than i had anticipated.

There are lots of different ways to insulate this type of roof but one of the best methods calls for the installation of rigid foam insulation above the roof sheathing. It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow. The attic or rafter assembly meets one of the following conditions regarding the air permeability of the insulation directly under the structural roof sheathing. There are at least two good reasons why this approach makes more sense than installing the insulation under the roof sheathing.

From the sound of it the roof has already been framed and that limits options. Box out light fixtures. Here are four approaches i recommend you investigate for insulating your attic. Insulated roof assemblies can be vented or unvented.

Apply a 2 inch layer of spray foam insulation r 10 to r 12 directly to the interior surface of the roof sheathing. Zip system r sheathing is the simple all in one structural panel with built in exterior insulation. Insulation is applied in direct contact with the underside of the structural roof sheathing. This will keep the surface warm and help minimize condensation.

The problem arises with moisture. Remove existing roofing and non adhered underlayment to expose roof sheathing. Look for water stains on the roof sheathing or damp or moldy spots on attic joists and existing insulation as a clue to where leaks might be. T he problem with the insulation against the sheathing expands.

The presence of mold inside your home even if it s in an unused place such as the attic can cause. Featuring integrated moisture air and thermal protection zip system r sheathing completely reimagines traditional wall assemblies by streamlining exterior water air and thermal management. Water is insulation s enemy.