Why is my deck falling apart after cleaning?

by John Doe
(New Jersey)

Apparent Dry Rot in First Deck Board

Apparent Dry Rot in First Deck Board

Last year I paid my neighbor to clean and paint my backyard deck. Ever since he did it i see holes popping up and cracks appearing. Might he have done the job wrong? Should there be some seal applied to it?

I'm starting to get worried. Also, what kind of wood filler should I get?

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Jul 11, 2010
by: Barnettdeck.com

Good theory. Your neighbor did nothing wrong. The decay process had already started. replace those boards. Remove any bio matter from on or under deck. Oils should be replaced after cleaning especially with cedar.

Jul 10, 2010
Risks pressure washing wood
by: Editor - Rich Bergman

I can't say exactly why your deck is falling apart after a pressure washing but I have a theory based on what I have seen happen to cedar shake and sawn shingle roofs.

First of all I don't know what type of wood that is but let me just explain what happened to these roofs. After a few years of use, the owners decided to pressure wash the shingles and so they hired a company.

The company did what it was hired to do and blasted away all the growth, mold, moss and dirt and the shingles looked brand new for about a year. But what happened was all the essential oils in the heart of the wood - cedar - that actually make them so good for use as shingles had been washed away leaving the pours open and without a natural defence to bacteria.

Within two years all of these roofs were in terrible condition, rotting and literally starting to flake away. They all had to eventually be removed and re-roofed.

Maybe a similar situation is happening here. Its just my theory. Maybe someone else who has more experience might be able to add to this phenomenon.

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