Flash & Batt
- Provides twice the sound resistance in normal frequency ranges than closed-cell foam
- Requires less materials than closed-cell foam for greater affordability
- Accommodates long-term creep, or slow flow, and seasonal movement to prevent deformations and shifts in placement over time in response to the influence of temperature and other stresses
- Durabilty – we advise covering open cell spray foam with a wallcovering such as sheetrock, plywood or metal to protect it from weather and people and/or objects.
- OCSF doesn’t interact well with existing loose fill insulation in attics. Sometime existing attic insulation will need to be removed prior to application.
- Requires ambient temp 50 degrees or higher for application to adhere.
Fiberglass batts better for sound proofing from below, above floor joists below floor. For instance, batts? can be laid on top of suspended ceiling to keep noise from moving room to room.
Thermafiber batts, SAFB (sound and fire mineral wool batt) are better for floor joists
Open cell spray foam, better to block sound from above.
more clarification next time