Plastic Sheathing For Attic Insulation

As with attic floor insulation moisture and heat removal are the reasons for creating proper air.

Plastic sheathing for attic insulation.

If the insulation is in your walls it is okay to put up plastic before you put up sheet rock. Install the plastic sheeting only after the insulation wiring and plumbing have been completed. This depends where the insulation is and why you want to cover it. The cool surface is the sheathing assuming no exterior insulation.

The humid air is indoors. Baffles establish a channel for air to circulate between the insulation and the roof sheathing. Staple plastic or foam baffles to the roof sheathing near the eaves to keep the material away. Item 491792 model hslw12 400.

The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow. Doubled vapor barriers in attic. Plastic isn t recommended in this situation because it would create a second vapor barrier that can trap moisture and result in condensation and mold. Plastic on the outer surface of a wall in cold weather could cause problems.

If water vapor diffuses or infiltrates into the wall cavity and finds the cool surface moisture problems can occur. If the insulation is in your. If it s jammed too tightly into a cavity it can t trap as much air and won t be as effective. The best vapor barrier to use is roll of plastic sheeting.

Most insulation is made of fiberglass and fits into the walls between the studs before drywall is installed. Laying a second layer of fiberglass batts in the attic is an easy way to boost r values. Stretch the plastic sheet tightly across the top of the wall and staple it to the studs and plates. 12 ft x 400 ft clear 0 31 mil plastic sheeting.

For the same reason insulation shouldn t touch the roof s underside.