International Association of Certified Home Inspectors
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| Exterior Contains discussions about the exterior portion of a home inspection. This includes roofs, gutters, downspouts, decks, patios, windows, et cetera. |
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#1
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Took me a long time to find one that would actually show the problem well.
But I finally did. Let's let some of the newer guys give a few guesses before identifying the cause of this patterning. -- Erby Crofutt B4U Close Home Inspections Georgetown, Kentucky KY Lic# HI-2041 www.b4uclose.com http://www.kentuckyradon.com Kentucky Home Inspections Kentucky Home Inspectors NACHI02090301 Read my Active Rain Blog here: Erby, The Central Kentucky Home Inspector Join Active Rain HERE and I'll get some points for your participation. Please! I did ask nice! |
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#2
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Quote:
I won't say a word Erby.................. Dale Duffy 602.402.5305 Phoenix Commercial Building Inspectors Inspect Arizona Companies, Inc. Phoenix Home Inspectors, Inc. Your Leaking House Your Leaking House Message Board InterNACHI 2007 U.S.A Member of the Year
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#3
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I'm going to guess expansion of the sheathing, which was installed without spacing or H-clips.
Joe Funderburk, CMI Alpha & Omega Home Inspections, LLC Inspecting Upstate SC & Charlotte Metro, NC NACHI ID: NACHI05120170 www.aohomeinspection.com |
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#4
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Incorrect spacing, no "H" clips
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#5
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Incorrectly installed (too thin) roof decking and/or too great a span for the thickness...
telegraphing those 'ribs'.... - Mike Michael W. Gault, SC RBI 1728 A to Z Home Inspections Charleston, Dorchester & Berkeley Counties in S.C. NACHI05040682 www.atozinspector.com (843) 442-9755 Charleston Home Inspector |
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#6
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The same install issue can and will cause cracking in hardcote stucco!
"I create controversy whether they like it or not" |
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#7
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H-clips aren't needed for plywood. Was this OSB or plywood?
This roof is either missing the roofing felt barrier which caused the sheathing edges to wick moisture, expand and become loose or improper nailing at the sheathing edges or last but not least, rigid board insulation that is improperly installed (picture framing). Last edited by dvalley; 11/23/07 at 4:33 PM.. |
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#8
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David, H clips are required for plywood, rafters 2" O/C or trusses.
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#9
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When the last time you seen plywood installed 24" o.c. anyways? Maybe the older homes.... |
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#10
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I will confess, I hardly ever see H-clip's, perhaps because I have never seen a roof with such thin sheathing or wide spacing where they were needed or required. Usually, in Massachusetts, if the rafters are spaced 24" or more, it's wood plank backing, not sheathing.
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#11
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Quote:
Regards Gerry "Never underestimate the difficulty of changing beliefs with false facts." (some RWNJ not called Mike) Commercial property Inspection Tampa, Orlando, Sarasota, Jacksonville, Ft Launderdale, Miami, Florida. NACHI cell 484-429-5466 NACHI02121106 |
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#12
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Quote:
That's Florida for ya. Not too much truss out here. I see it, but not too often. |
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#13
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David, Many garages I build have trusses 24 OC and clips are required.
The same with homes, I always use 5/8 fir plywood on my roofs and if it's trusses 24 OC they get H clips, been doing it that way for years. You mentioned T&g, which I assume you are referring to 5/8 T&G Advantech, if so I'm not sure if that requires clips as the cost is usually prohibitive and rarely do we use it on roofs. |
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#14
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#15
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Quote:
I was just trying to explain that this is a current practise with roofs built with trusses 24O/C Has been for years. What code are you referencing that says their not required? Not that I'll change what I'm doing, just curious for the info. I'm not sure but I also believe the shingle manufacturers will void their warranty if clips aren't used on a 24" O/C roof. |
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