Photoshop enhaced photo so you can see where the this will put much less pressure on the foam from any flexing that may have to occur and will.
Can You Put Spray Foam In Existing Walls. In fact it may increase noise transmission by making a shorter mechanical 'bridge' between drywall panels. Assess the existing condition of the wall.
Roofing, Drywall & Insulation | Lumber One from lumberone.org
Next steps are putting in the framing. Rigid foam will not help soundproof a wall. Spray polyurethane foam, more commonly referred to as spf, is a material that's sprayed as a liquid so it can expand into a foam, creating a solid layer across an existing roof.
Simply enter your desired final it is designed to expand slowly, filling existing plastered or drywall covered walls completely.
Insulating vertical closed walls with existing fiberglass used to be impossible. You'll pay more up front to install spray foam insulation. Wrong information about spray foam is easy to find. The cans of foam that you can get at the home center are polyurethane foam, which cures fairly rigid.
