https://forum.deckstainhelp.com/deck-stain-questions-and-answers/new-vertical-grain-wpenofin-turns-moldy/ Deck Stain Help Forum Discussion Board en-US Thu, 30 Apr 2026 12:29:27 +0000 wpForo 60 https://forum.deckstainhelp.com/deck-stain-questions-and-answers/new-vertical-grain-wpenofin-turns-moldy/#post-7951 Sun, 09 Sep 2012 15:31:50 +0000
]]> Deck Stain Questions and Answers carrottopcurls https://forum.deckstainhelp.com/deck-stain-questions-and-answers/new-vertical-grain-wpenofin-turns-moldy/#post-7951 https://forum.deckstainhelp.com/deck-stain-questions-and-answers/new-vertical-grain-wpenofin-turns-moldy/#post-7949 Sun, 09 Sep 2012 12:06:21 +0000
Actually I think is the environment, not the wood.]]> Deck Stain Questions and Answers Scott Paul ~ Restoring Wood & Decks Since 1993 https://forum.deckstainhelp.com/deck-stain-questions-and-answers/new-vertical-grain-wpenofin-turns-moldy/#post-7949 https://forum.deckstainhelp.com/deck-stain-questions-and-answers/new-vertical-grain-wpenofin-turns-moldy/#post-7946 Sat, 08 Sep 2012 14:09:34 +0000
Thanks for the advice! You may be on to something saying that it could be the wood. We did clean 1/2 of it using Wolman's Deckbrite (not sure if that has a stripper, which is what I will need to look for) and with the rain this week, it started to get black again! Think I'm going to call the builder supply house and talk with them about the lumber product.

I'll keep everyone posted and will post pictures. Beautiful wood, just might be faulty??
]]> Deck Stain Questions and Answers carrottopcurls https://forum.deckstainhelp.com/deck-stain-questions-and-answers/new-vertical-grain-wpenofin-turns-moldy/#post-7946 https://forum.deckstainhelp.com/deck-stain-questions-and-answers/new-vertical-grain-wpenofin-turns-moldy/#post-7941 Sat, 08 Sep 2012 12:15:09 +0000 Deck Stain Questions and Answers Scott Paul ~ Restoring Wood & Decks Since 1993 https://forum.deckstainhelp.com/deck-stain-questions-and-answers/new-vertical-grain-wpenofin-turns-moldy/#post-7941 https://forum.deckstainhelp.com/deck-stain-questions-and-answers/new-vertical-grain-wpenofin-turns-moldy/#post-7938 Fri, 07 Sep 2012 15:45:53 +0000 Deck Stain Questions and Answers carrottopcurls https://forum.deckstainhelp.com/deck-stain-questions-and-answers/new-vertical-grain-wpenofin-turns-moldy/#post-7938 https://forum.deckstainhelp.com/deck-stain-questions-and-answers/new-vertical-grain-wpenofin-turns-moldy/#post-7937 Fri, 07 Sep 2012 15:44:05 +0000
1. Lewisburg, Pennsylvania

2. Full afternoon sun, deck has western exposure

3. We used vertical grain wolmanized wood with Stabilyzr water repellant, Kiln Dried. Think it is pine. HM Stauffer and Sons, Leola, PA. Lumber yard recommended Penofins but didn't push it necessarily.

4. Turned black after only 2 months of application of stain.

5. We used Penofin in the red can. Wood was just installed and we cleaned the deck with Wolmans DeckBrite since the surface was dirty from the contractors. I then lightly sanded the deck. It was beautiful. Only applied one light coat of Penofins and within 3 hours it rained :( Rain wasn't expected but happened by surprise. Black mold appeared within 2 months. It has been very wet lately with humid conditions. We even cleaned it again 2 weeks ago with Wolman's Deckbrite and it again is turning black!

I have not contacted Penofins nor the lumber yard. Could it be the wood? Or Penofins? We live in a small town and many of the top rating stains are not available. Please help! First, what cleaner/stripper? do we use and then what do we stain with? The covered screen room in which we used Penofins on as well looks fine with no mold appearing yet.

Thanks for your help! Your advice is much appreciated! I can post pictures if needed.
Wendy]]> Deck Stain Questions and Answers carrottopcurls https://forum.deckstainhelp.com/deck-stain-questions-and-answers/new-vertical-grain-wpenofin-turns-moldy/#post-7937