Analyzing Indoor Air Quality: The Overlooked Aspect of Energy Efficiency
Indoor air quality (IAQ) is a crucial yet often overlooked aspect of energy efficiency in building design and operation. A
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Benchmark Builder
Building science research for working contractors
Benchmark Builder
Building science research for working contractors
Most Jobsite Fires Start the Same Way. Here’s What the NFPA Data Shows.
NFPA incident data on residential construction fires: hot work, temporary wiring, and combustible storage account for 80% of losses. Prevention costs less than a day’s labor.
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The ADU Math: What It Actually Costs Per Door in 2025
Hard numbers on accessory dwelling unit construction costs, permitting overhead, and rental yield — from 400 completed projects across three metros.
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Synthetic Underlayment Beat Felt in Every Test. Builders Still Use Felt.
Lab and field data comparing synthetic vs. asphalt felt underlayment on tear strength, UV exposure, and moisture vapor transmission. The price gap closed in 2023.
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Which Green Certification Actually Adds Resale Value? The Appraisal Data Is In.
A nationwide appraisal study compared resale premiums for LEED, Energy Star, NGBS, and Passive House certified homes. The results aren’t what the certification bodies advertise.
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The Egress Window Rules Changed. Most Plans Haven’t Caught Up.
The 2024 IRC expanded egress window requirements to include basements used as living space, changed minimum opening dimensions, and added new well depth standards. Three changes every plan reviewer is flagging.
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Radon Mitigation Costs $500 in New Construction. It Costs $3,000 After.
EPA data shows one in fifteen homes has elevated radon. Passive radon mitigation during new construction adds $300-500 to the build. Retrofit mitigation averages $3,000. The math is simple.
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Heat Pumps in Cold Climates: The Data Has Caught Up to the Hype
Five years of field data from Minnesota, Vermont, and Maine show cold-climate heat pumps maintaining 95% rated capacity at 5°F. The “they don’t work in the cold” argument is over.
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One in Five Window Installations Fail Within Ten Years. Yours Might Be Next.
A forensic study of 800 window warranty claims found that 82% of failures trace to installation errors, not product defects. The three most common mistakes are all preventable.
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The Research on Residential Project Scheduling Says You’re Doing It Backwards
Academic research on construction scheduling overwhelmingly supports pull planning over push planning for residential projects. Most builders have never heard of it.
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