Re-decking A Roof - General Discussion - Contractor Talk

Re-decking A Roof

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Old 08-14-2019, 06:14 PM   #1
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Re-decking A Roof

Is it necessary to space the 7/16 osb on a re deck over a 1X12 lumber deck
I think it needs room for expansion and contraction
I say yes but, a roofing contractor I know tells me itís not necessary

Any of you roofing contractors want to chime in on this?
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Old 08-14-2019, 06:19 PM   #2
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Re: Re-decking A Roof

yes, it needs to be spaced.


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Old 08-14-2019, 07:42 PM   #3
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Re: Re-decking A Roof

I agree, it does. By the way, love your avatar. My favorite show of all time.. Skin that un pilgrim and Iíll fetch you an other one.
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Old 08-15-2019, 05:14 AM   #4
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Re: Re-decking A Roof

Space panels min 1/8" (most guys use 10D nails) to allow for possible moisture expansion and also check and make sure that installation of panel clips is not required.
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Old 08-15-2019, 05:37 AM   #5
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Re: Re-decking A Roof

I have re decked with 3/8 over 1x8 plank with just a small gap. It works fine, no problems.

I replaced the roof 15 yrs later when the guy want to change the color and it was fine.
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Old 08-15-2019, 08:44 AM   #6
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Re: Re-decking A Roof

Code requires it to be installed according to manufacturer instructions.

Once you install it and put the roof on, chances are it will shrink and not expand too much unless there is an attic moisture problem.
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Old 08-20-2019, 04:29 PM   #7
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Re: Re-decking A Roof

I always space the panels on the sides when laying over1x decking , I've never concerned myself with the top and bottom edges amd never had an issue.

I do make sure to nail into the rafters or trusses though....seen a lot of guys over the years who just randomly shot it down


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