1yr old fence panels / dark stains need removing!

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25 Jun 2022
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Peterborough
Purchased these fence panels a year ago and fitted them without the need as I thought they were treated?

I want to seal them now as they are getting some dark areas (see photos) what is this mould?

Any suggestions as to what I should do? Sand it out? Treat it first with mould “stuff”

I was thinking what people think of just using a clear decking stain as I can’t seem to find anything clear?

These are the fence panels:


These are my panels and mould?

 
Great, I think I will try and see if it will sand out. SO annoying though it shows as black as this.


My view is it's not mould but it's weathering. The compounds in the wood that give the current beige colour get broken down by the effect of water and sun and temperature change on the wood, and it goes silver grey. Eventually the whole fence will go this colour. It has only been pressure treated, and that is not enough to preserve colour. Once it has got weathered, you can't really change the colour, unless the weathering doesn't go far down, in which case you could sand off the weathered area (unlikely).

There is clear water-based wood preserver which would prevent rot and probably slow the weathering and keep the panels in better condition:


However, colour would probably still move to grey gradually, so if you want consistent colour, it's probably best to choose a coloured wood preserver (and probably not water-based).
 
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