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Old 09-07-2016, 02:48 PM   #1
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Damage to subflooring

We had a water leak in our 2004 40' mid-door Alpine. It appears that the leak stemmed from the seam between the basement and the upper motorhome.It damaged the osb under the floor. I've taken the trim molding off and found screws that were broken and some missing. I've fixed the leak problem but need to find somewhere to fix the osb sub floor. Anybody have any ideas?

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Old 09-07-2016, 03:07 PM   #2
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Where are you located?

It is going to be very difficult without pictures or a complete description for us to know what is involved.

Could be as easy as using git-rot in the affected area, could involve cutting out the rotted section and reflooring.

Brett Wolfe
2003 Alpine 38FDDS
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Old 09-07-2016, 03:45 PM   #3
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Unfortunately, water intrusion along the belt-line is not an uncommon problem. The challenge for making any repair is that the sub-floor is a sandwich construction of two outside layers of OSB and a fairly thick inter-layer of styro-foam. You may have to cut the OSB back to a structural support, then re-bridge the space with independent layers of OSB and styro-foam. As mentioned, if one of the OSB layers and the stryo-foam are still intact, you may be able just replace or repair[git-rot????] the affected OSB layer.
Old Scout
2003 40' MDTS
Garden Ridge, Texas
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Old 09-07-2016, 04:33 PM   #4
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Git-rot: BOATLIFE Git Rot Penetrating Epoxy | West Marine

Have used it for years on boats where the wood sandwich has rotted due to water intrusion.
Brett Wolfe
2003 Alpine 38FDDS
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