Last spring I built a bar for the outdoor’s out of cedar. It is about 6′ high 6′ lond and 3′ deep. It has a refrigerator on one side and a cedar roof. The bar was used for a few weeks before they put a sealer on it. About a month after they sealed it little round spots started to show up mostly on the bottom half front and side’s they appear to be mold and they seem to be under the sealer. I have work with cedar for 15 years and never saw anything like this.
Any thoughts would be appreciated.
Thanks Bob,
Replies
Spring is a bad time to seal outdoor wood. What happens is you clean the wood,wait two - three days for the wood to dry, then apply the stain or sealer.
The problem is in those 2-3 days pollen is flying all over the place and landing on the surface you just cleaned. If you apply a sealer over pollen it will trap that pollen and turn the wood a very dark brown or even black.
June-Sept is the best time to apply a sealer or stain.
It sounds like your problem however is BBQ grease splatters getting covered over by sealer. You were impatient and used the BBQ before you sealed the wood.
Bad boy Bob :-)
"Rather be a hammer than a nail"
Bob
ProDDeck probably right on here / but also could be situation where someone sealed w/ wonderful product like linseed oil without mold/mildew inhibitor - works out to be fine culture/ host for mildew on cedar