siding rot

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Every House Needs Roof Overhangs

Adequate roof overhangs help shade windows in hot weather and reduce the amount of rain that hits your siding, windows, and doors

Posted on Jul 11 2014 by Martin Holladay

Many residential designers pay too little attention to roof overhangs. Roof overhangs have several important functions: they can protect exterior doors, windows, and siding from rain; they can shade windows when solar heat gainIncrease in the amount of heat in a space, including heat transferred from outside (in the form of solar radiation) and heat generated within by people, lights, mechanical systems, and other sources. See heat loss. is undesirable; and they can help keep basements and crawl spaces dry. A house with improper overhangs can overheat in the summer, can suffer from water entry problems at windows and doors, and can have premature siding rot.

The most common design error is to make roof overhangs too stingy. It’s also possible (although much rarer) for roof overhangs to be too wide.

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Image Credits:

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  2. Image #2: Allstate Exteriors /
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  4. Images #4 and #6:
  5. Image #5: Syracuse Home Remodling / Allcraft
  6. Image #7: G. Mills /
  7. Image #8: Square Jer / Jerry H.
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  9. Image #10: Coconut Pete
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  11. Image #12: Paul Duncan
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  14. Image #15: Building Science Corporation /
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  16. Image #17: Build LLC

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All About Wall Rot

If your wall sheathing is rotten, the first question to answer is: where did the moisture come from?

Posted on Nov 23 2012 by Martin Holladay

Contractors who specialize in repairing rotten walls won’t run out of work any time soon. The epidemic of wall-rot problems that began more than 20 years ago shows no signs of abating. In fact, wet-wall specialists are often called to investigate problems in developments where most of the homes have rotting walls — and in some cases, these homes are only six years old.

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Image Credits:

  1. Photo with pipe staging: Will Smith — Rot under window: Mark Parlee (MP) — Splashback: Fairhope Farm — No kickout: MP — Missing step flashing: MP — Missing deck flashing: Everflashing — Ice dam: Ecduzitgood — Solar vapor drive: MP — Exfiltration: FHB

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