Attics
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Attic Upgrades and Ventilation
Do better insulation and new heating-cooling equipment warrant mechanical ventilation?
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Roof for a Mild Coastal Climate
If mechanical equipment is going in the attic, should the attic be sealed and conditioned or vented and unconditioned?
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Venting Bathroom Exhaust Air
Never terminate bathroom exhaust ducts in an attic, where added humidity can lead to mold issues and expensive repairs
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Going Above Prescriptive Code Insulation Values
How much is too much? Consider this rough cost-benefit analysis of adding extra cellulose insulation to an attic floor.
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Low-Slope Roof and Ice Dams
Can eave-to-ridge roof venting, vigilant air-sealing, and robust thermal control prevent ice dams in high-snow country?
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Recurring Mold in the Attic
What is the source of moisture in this cold-climate vented roof assembly with cellulose insulation?
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Air-Sealing and Insulating an Existing Wall
What are the most effective air-sealing strategies and best insulation types for minimizing airflow through a north-facing wall?
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A New Technical Guide to Building ADUs
Beyond Efficiency has released the first in a series of regional guides with design and construction details for accessory dwelling units
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Building Science Trivia Time
IBS 2024 inspires a homegrown game designed for GBA readers
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Building Mistakes to Avoid, Part 1
From missing flashing details to incomplete roof venting, understanding how things go wrong is a good initial step toward getting them right
