In a hot humid climate there is no advantage to inviting outdoor air into your attic.
Pros and cons of unvented attic.
No roof venting to install complex roof are inherently difficult to vent sealing may be the solution may increase the usable area of a house.
The pros unventilated attics are common where roof assemblies are complex and it s difficult to create a sealed ceiling plane.
A fundamental requirement of an unvented attic assembly is the use of air impermeable insulation on the underside of the unvented roof to prevent air infiltration and exclude airborne moisture from the attic.
When properly installed unvented roofs perform well and cause no excess moisture accumulation.
These roofs can lower your heating costs in the winter.
This is especially true if you plan to install any ducts in your attic.
If water or air ducts run through your attic space they are less likely to be affected by extreme temperatures and this can save you money on utility costs.
This could actually penalize a house under leed h air sealing the ceiling is not necessary attic hatches do not need to be insulated and gasketed.
This reduces latent air conditioning loads and provides further reductions in energy consumption.
Adding unvented attic insulation like spray foam seals the building envelope and stops airflow.
Poorly insulated ducting can cause heat loss in colder months and the loss of conditioned air in the summer in vented attics.
This air seal will help to make your home more energy efficient.