Can I spray foam without removing the drywall?

We are often asked if spray foam can be applied to existing walls. Yes, you can add spray foam to existing walls; however, the drywall must be removed first.

Spray foam expands rapidly when applied inside walls. If you attempt to add insulation without removing the drywall, the expanding foam can overfill a panel. This creates pressure on the interior of the plasterboard, potentially causing damage or cracks.

It is essential to remove the drywall before installing spray foam insulation. While it is possible to remove the drywall yourself, it can be a time-consuming and messy task. Hiring a professional insulation company to handle the removal and installation of the drywall may be more expensive, but they will have the expertise to do it efficiently.

Alternatively, fiberglass insulation is a good option that requires minimal removal of the drywall. Our team strategically places several holes in the existing wall and then densely packs the fiberglass. This, in our opinion, is the only way to install insulation into existing walls without removing the drywall.

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