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Old 03-30-2009, 12:36 PM   #1
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New tongue-and-groove porch flooring is buckling


Hi,
Last weekend, I replaced some rotting tongue-and-groove boards on my front porch. I primed and painted them and hammered them into place with a mallet. It was a very tight fit, but the replacement boards looked great. I did not glue them or nail them to the floor joists below. There is no vapor barrier below my 4 X 6 foor porch and it is exposed to the elements.

It snowed last night and when it woke up I noticed that the boards I replaced are buckling quite a bit. What happened and what can I do about this?

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Old 03-30-2009, 01:05 PM   #2
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New tongue-and-groove porch flooring is buckling


Quote:
It was a very tight fit, but the replacement boards looked great. I did not glue them or nail them to the floor joists below. There is no vapor barrier below my 4 X 6 foor porch and it is exposed to the elements.
This was your answer. Each item is wrong. Too tight, not secured, not protected from vapor underneath, and not protected from the elements.

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Old 03-30-2009, 01:08 PM   #3
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New tongue-and-groove porch flooring is buckling


Ok - what can I do now? It's just three boards. Can/should I nail them down? Remove them and put in vapor barrier? There is a lot of airflow beneath this porch and it's been standing for 120 years...
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Old 03-30-2009, 01:13 PM   #4
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New tongue-and-groove porch flooring is buckling


Cut one board smaller on a table saw to allow space for it to expand and contract. Do not hammer in tightly. It needs to float in the groove, which is what the groove is for. It hides the gap during the contraction stage. Nail securely though the tongue and use stainless finish nails for the last board. paint or stain with exterior deck coatings to protect from the elements. With good air flow you will be okay without the vapor barrier.
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Old 03-30-2009, 01:22 PM   #5
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New tongue-and-groove porch flooring is buckling


ok, thank you!
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