How do I Install Fiberglass Insulation Batts?

Q: I need to install fiberglass insulation batts in the drafty crawlspace of the “fix’er upper” house I recently purchased. How do I do this?

 

A: First, install the insulation in the transition where the foundation wall meets the floor joists. Cut the batts large enough so you can pack the insulation between the joists and wall just tightly enough to prevent it from falling out. Next, install batts between the floor joists so that the vapor barrier is facing upward. You can support the batts from below by fastening chicken wire or insulation stays onto the joists. Install the batts so they are long enough to drape from the mudsill, down the foundation wall and about 2 feet on the floor. Hold the draping insulation in place by nailing a 1-by board over the insulation and into the mudsill. Only tack the nails deep enough to hold the insulation in place while only slightly compressing it. If there is no vapor barrier covering the dirt floor, then install 6-mil plastic over the entire surface, anchoring it with bricks.

Hot Product

MULE Outdoor Wet-Rated Oscillating Wall Fan
MULE Wet Rated Oscillating Fan

The MULE Wet Rated Oscillating Fan is designed to bring powerful cooling to outdoor spaces while maintaining durability in wet conditions. With a black matte finish, this fan is built to withstand the elements, making it perfect for covered patios, porches, and other outdoor areas. Its 80-degree oscillation ensures widespread airflow, creating a natural breeze […]

Read More >>