Thanks for this video. I am more accustomed to builds in cold climates where there may be cooling required in summer, but more heating requirement in shoulder seasons and winter. Would you be concerned about ice buildup on the roof due to snow thaw,due to heat escaping from the roof? This can occurs if venting is not adequate, in a vented roof, especially when insulation blocks the flow of air from the eaves.
With the encapsulated attic you still want the roof vented from soffit to ridge using baffles or you can end up with moisture, to make matters worse the suggested spray foam as shown in the video will trap that moisture and hide a rotting roof structure
Thank you, Andrew. However, if you vent the attic, it negates the purpose of encapsulating it. When you encapsulate the attic, the goal is to bring the attic space into the thermal envelope of the house. With small cracks and gaps in the ceiling, such as those from lighting, a path is created for conditioned air to travel into the attic. This process slightly conditions the attic, reducing its temperature, the duct load, and the ceiling load, which in turn makes everything more efficient to operate. If you have implemented this approach differently and have documentation, I would love to review it. Please send it to Tom@procalcs.net. The world is always changing, and I’m always open to new ideas. Thank you for your comment. Please keep them coming - they keep me on my toes!
@@procalcsuniversity1484 I tried posting a link to what I’m talking about but UA-cam auto-deleted it. They don’t like links in the comments Basically you still encapsulate the attic but still vent the roof. From outside in it goes your roof sheathing, 1” air gap created using foam or plastic baffles (sold at all building supply stores), then your insulation. My preferred is rockwool then foil faced rigid insulation aiming for at least R30. Any more can be hard to achieve while still maintaining head room. The baffles vent the roof from soffit to ridge and/or hips. This venting also helps vent roof heat and moisture/condensation
Thanks for this video. I am more accustomed to builds in cold climates where there may be cooling required in summer, but more heating requirement in shoulder seasons and winter. Would you be concerned about ice buildup on the roof due to snow thaw,due to heat escaping from the roof? This can occurs if venting is not adequate, in a vented roof, especially when insulation blocks the flow of air from the eaves.
With the encapsulated attic you still want the roof vented from soffit to ridge using baffles or you can end up with moisture, to make matters worse the suggested spray foam as shown in the video will trap that moisture and hide a rotting roof structure
Thank you, Andrew. However, if you vent the attic, it negates the purpose of encapsulating it. When you encapsulate the attic, the goal is to bring the attic space into the thermal envelope of the house. With small cracks and gaps in the ceiling, such as those from lighting, a path is created for conditioned air to travel into the attic. This process slightly conditions the attic, reducing its temperature, the duct load, and the ceiling load, which in turn makes everything more efficient to operate.
If you have implemented this approach differently and have documentation, I would love to review it. Please send it to Tom@procalcs.net. The world is always changing, and I’m always open to new ideas. Thank you for your comment. Please keep them coming - they keep me on my toes!
@@procalcsuniversity1484 I tried posting a link to what I’m talking about but UA-cam auto-deleted it. They don’t like links in the comments
Basically you still encapsulate the attic but still vent the roof. From outside in it goes your roof sheathing, 1” air gap created using foam or plastic baffles (sold at all building supply stores), then your insulation. My preferred is rockwool then foil faced rigid insulation aiming for at least R30. Any more can be hard to achieve while still maintaining head room. The baffles vent the roof from soffit to ridge and/or hips. This venting also helps vent roof heat and moisture/condensation