Are you completely filling the rafter bays, or just spraying the underside of the decking?
The reason you are getting different responses, is a combination of knowledge on the ventilation or non-ventilation of a cathedral ceiling and the different theories being dangled out in various opposing research interpretations.
Even with proper 100% continuous Balanced Intake and Exhaust Ventilation, while the results seem to have determined that would be better, it is still not as good as an open attic scenario getting properly ventilated.
Remember the vapor barrier under the warm conditioned heated side of the insulation and sealing all gaps that enter the rafter bay cavities.
Does your roof plane have any valleys or hips on it?
Are there any skylights installed in any of the rafter bays?
Are there any heat stack B-Vents that protrude through the roof where the cathedral ceiling is?
How thick will a 2 Pound Closed Cell Foam Application wind up being?
Ed
The reason you are getting different responses, is a combination of knowledge on the ventilation or non-ventilation of a cathedral ceiling and the different theories being dangled out in various opposing research interpretations.
Even with proper 100% continuous Balanced Intake and Exhaust Ventilation, while the results seem to have determined that would be better, it is still not as good as an open attic scenario getting properly ventilated.
Remember the vapor barrier under the warm conditioned heated side of the insulation and sealing all gaps that enter the rafter bay cavities.
Does your roof plane have any valleys or hips on it?
Are there any skylights installed in any of the rafter bays?
Are there any heat stack B-Vents that protrude through the roof where the cathedral ceiling is?
How thick will a 2 Pound Closed Cell Foam Application wind up being?
Ed
