Cedar fence stain bubbling and blistering after ~4 years


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Old 05-24-15, 09:12 AM
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Cedar fence stain bubbling and blistering after ~4 years

My cedar fence is bubbling in several spots. I stained it with Olympic clear stain about 7 years ago. It was okay for a couple of years then about 2 years ago air bubbles started to form in spots and they haven't stopped showing up.

I am looking for advice as to whether I can sandblast the wood and what I should use to keep it from bubbling and blistering again. Thanks.

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Old 05-24-15, 10:57 AM
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Clear stains have the shortest life so I'm not suprised that it's looking poorly after 7 yrs. While you could sandblast the fence I'd lean towards cleaning it with TSP [add bleach if there is mildew] and rinsing with a pressure washer. That may get it decent enough to recoat. There isn't a lot you can do to extend the life of clear wood sealers, using a stain with some pigment would help.
 
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Old 05-25-15, 04:43 AM
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Thanks for the reply and advise. I was thinking about power washing but thought I should remove all of the current stain and get to bare wood. Would it be okay to stain over what I can't get off with the power washer? And I am planning on using a stain with a pigment for color.
 
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Old 05-25-15, 05:55 AM
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Cleaning with TSP both gives the new stain a clean surface and slightly etches the old stain further promoting good adhesion. My only concern with going over the old stain would be if the old stain still beads water real good which could pose an issue with some but not all stains. When it doubt, read the label on the can
 
 

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