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- Can too much soffit and ridge ventilation actually hurt a house if the . . .
In a poorly sealed house roof venting can increase the stack effect - meaning more air entering the house at the base, and exiting into the attic That's why the recommendation is to have more vents at the soffits than at the peak, which slightly pressurizes the attic, reducing exfiltration
- Should I vent my unvented garage attic? - GreenBuildingAdvisor
I’m building a new single-story single-family house with an unvented attic and am looking for input on how to address my attached unvented garage attic The home is located in Northern California in climate zone 3-C (Marine), so mild weather year-round
- Attic Upgrades and Ventilation - GreenBuildingAdvisor
BGG had an energy audit done, which informed his plan to remove the existing fiberglass batts, air-seal the attic, install a ducted heat pump system, then blow in cellulose insulation He asks if, while the attic is empty, it is a good time to perform other upgrades He is particularly interested in whether mechanical ventilation should be added
- Venting Bathroom Exhaust Air - GreenBuildingAdvisor
Exhaust air from bathroom fans should never be ducted into an attic but rather to a point outside the building enclosure
- Ducts in an Unconditioned Attic - GreenBuildingAdvisor
Running unprotected ductwork through an attic can court problems Particularly in hot-humid climates, moisture can collect on the outside of ducts in summer Encapsulating ducts in closed-cell foam or following code-prescribed methods for burying ducts in insulation can prevent the problem Illustration courtesy Home Innovation Research Labs
- Is Venting an Unconditioned Attic Necessary?
The condensation-related problems associated with unconditioned attics have less to do with ventilation than air-sealing and insulation
- All About Attic Venting - GreenBuildingAdvisor
A rundown of reasons why venting an attic makes sense and how it can prevent issues that negatively impact a house's performance
- Does Spray Foam in the Attic Make It a High-Performance Home?
Where an R-20 encapsulated attic does sometimes make sense is for existing homes If a homeowner has a set budget for improvements, using some of that to do R-20 spray foam on the roofline can provide a lot of benefit if ducts are in the attic and if it reduces air leakage significantly
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