Putting Plastic Sheeting Over Insulation

Plastic on the outside.

Putting plastic sheeting over insulation.

The plastic and the insulation will eliminate any moisture problems you have in the crawlspace such as water droplets collecting on the concrete walls. The best vapor barrier to use is roll of plastic sheeting. Without such a barrier condensation can infiltrate your home s walls and insulation creating a substantial risk of mold and mildew. Picture an ice cold can of soda on a sweltering hot day.

Item 491792 model hslw12 400. How to install poly over insulation. More use the plastic these days without paper faced insulation. Plastic sheeting can also help turn a crawl space into a usable storage area.

Stretch the plastic sheet tightly across the top of the wall and staple it to the studs and plates. Paper faced insulation is the same as using plastic vapor. Most insulation is made of fiberglass and fits into the walls between the studs before drywall is installed. If you want to put something on the bottom of the joists to hold the insulation in place use chicken wire landscape fabric or housewrap so any water vapor from inside the house can escape.

Soon water pours off the can. After the insulation is installed it is necessary to cover it up with a vapor barrier so the glass fibers are not inhaled. If you re referring to insulation in an attic you shouldn t put plastic sheeting over the top of it either for the same reason. Homeowners use plastic to cover their crawl spaces to control moisture and create a barrier against vapor.

To each is own some believe the plastic works better. Install the plastic sheeting only after the insulation wiring and plumbing have been completed. Overlapping paper tabs on faced insulation and stapling is why its on there. 12 ft x 400 ft clear 0 31 mil plastic sheeting.

If water vapor diffuses or infiltrates into the wall cavity and finds the cool surface moisture problems can occur. We use foil faced rigid insulation to keep the space under the house dry. The cool surface is the sheathing assuming no exterior insulation. This article will show you how to add 6 mil plastic sheeting on the ground and insulate the walls in your crawlspace.