Staining a 2 yr old...
 
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Staining a 2 yr old PT deck over a Rubber Roof

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 LBG
(@lbg)
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Joined: 7 years ago
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Great to find all this information! Thank You!

Staining 480' 2 yr old PT deck in high sun in Boston Ma that was built directly over a rubber roof.  Have an additional 3 level PT stairway (treads & railings) and 140' deck where rubber is not an issue. 

Question: Original choice was an oil stain - Penofin recommended by the guys I trust -  for the saturation and durability of oil.  Research on Naptha and Xylene (primary ingredients of any petroleum distillate) - show a highly detrimental rating to rubber.  Yikes!

The application technique - brushing on and then wiping off any non-saturated surface collection seems pretty safe if done carefully - but it is a new rubber roof and I am happy to be careful and cautious.  

Does this then lead me to choose a water based stain?  In following your site Defy seems to get very high ratings - but is there another I should pursue?

A follow up question: I like the gray of the seasoned decking - and was hoping for a semi-gray transparent stain to unify the seasoned and sun-saturated decking with the still slightly PT yellow/green of the stairway.   Thompson's was the only one I could find that offered a gray stain color - but I have seen a lot of bad reviews of this product , and the test was lackluster and unimpressive.)  

Can I add a gray pigment to the Defy to get a transparent grey to create a uniform treatment between deck and stairway?

Or - is the answer to treat with a transparent Defy and come back in 3 years with a more pigmented stain when I am ready to shift red/brown for a colored deck? 

 

Thanks for your great help with these questions!


   
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Scott Paul ~ Restoring Wood & Decks Since 1993
(@administrator)
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Joined: 12 years ago
Posts: 3232
 

Defy would be a good choice for this and it does come in a Driftwood Gray color. You could also use their Clear and allow it to gray naturally. You cannot tint the Defy products with your own colorant.


   
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 LBG
(@lbg)
New Member
Joined: 7 years ago
Posts: 2
Topic starter  

Thanks for the reply and great news about defy driftwood gray. I did not see this as a color choice when looking at their product.

Am I right however about not applying oil stain to a deck above a rubber roof?

Second question: Am I also compromising quality and longevity in working with a water based vs oil stain?

Third: if Defy is the best decision, does it make sense to go with a semi transparent coat of the gray, and then plan on working to a solid coat when I next treat the deck?

thanks for your thoughts and expertise!


   
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Scott Paul ~ Restoring Wood & Decks Since 1993
(@administrator)
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Joined: 12 years ago
Posts: 3232
 

I do not think an oil based stain will harm the roof but it depends on what the stain manufacturers say.

Not really. Both oil and water can be good if using a quality stain.

Don't use a solid. They do not soak in and are prone to peeling.

 


   
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