Attic Sheathing Insulation

Featuring integrated moisture air and thermal protection zip system r sheathing completely reimagines traditional wall assemblies by streamlining exterior water air and thermal management.

Attic sheathing insulation. Remove existing roofing and non adhered underlayment to expose roof sheathing. The presence of mold inside your home even if it s in an unused place such as the attic can cause. T he problem with the insulation against the sheathing expands. Insulation is applied in direct contact with the underside of the structural roof sheathing.

Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored. The attic or rafter assembly meets one of the following conditions regarding the air permeability of the insulation directly under the structural roof sheathing. Zip system r sheathing is the simple all in one structural panel with built in exterior insulation. Insulated roof assemblies can be vented or unvented.

Nick an owner builder pal of mine helped me put up the insulation and sheathing over the course. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. Water is insulation s enemy. The quick pace has proven to be quite auspicious as the typical summer monsoon storm systems begin to play out in southwestern new mexico.

If there is a roof leak the insulation will be damaged by the water leaving you with less insulating value. This retrofit assembly is appropriate for homes with conditioned attics or where the retrofit is intended to create a conditioned attic. Here are four approaches i recommend you investigate for insulating your attic. Mold on attic sheathing.

In the vast majority of cases the mold growth is caused by condensation. There are at least two good reasons why this approach makes more sense than installing the insulation under the roof sheathing. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. 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.

This will keep the surface warm and help minimize condensation. From the sound of it the roof has already been framed and that limits options. It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow. The moisture is held in place by the insulation which allows for damage to the framing and other building components.

Install insulating sheathing above the roof deck on existing homes. The problem arises with moisture. Apply a 2 inch layer of spray foam insulation r 10 to r 12 directly to the interior surface of the roof sheathing.