Installing Plastic Sheeting Over Insulation

The cool surface is the sheathing assuming no exterior insulation.

Installing plastic sheeting over insulation.

The humid air is indoors. Picture an ice cold can of soda on a sweltering hot day. Move down the wall and staple the sheeting to the studs over the insulation until reaching the end of the wall. Continue preparing adhesive and installing polystyrene sheets in the same manner until you cover the whole surface of the wall.

Plastic on the outside. The colder the contents the more beads of sweat that form on the sides. Soon water pours off the can. Plastic on the outer surface of a wall in cold weather could cause problems.

This article will show you how to add 6 mil plastic sheeting on the ground and insulate the walls in your crawlspace. Go to the second wall and install the sheeting over the insulation just like the previous wall. If water vapor diffuses or infiltrates into the wall cavity and finds the cool surface moisture problems can occur. Stretch the plastic sheet tightly across the top of the wall and staple it to the studs and plates.

Use the pattern described beforehand as to give strength to the insulation layer on one row install the sheets horizontally as on the next one lay them vertically. We use foil faced rigid insulation to keep the space under the house dry. How to install poly 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.