Moldy cladding

[kav]

Hi I cut some waney cladding for a friend from some douglas. It had been down about 6 months before I cut it. He put it up a couple of days after cutting but is now saying it's going mouldy with black spots. It's just on the sap wood. Any thoughts on cause (I know its been wet) or what we can do do to remedy it. 

I'll try and get him to get a pic.

Cheers

 

 

[trigger_andy]

15 minutes ago, kav said:

Hi I cut some waney cladding for a friend from some douglas. It had been down about 6 months before I cut it. He put it up a couple of days after cutting but is now saying it's going mouldy with black spots. It's just on the sap wood. Any thoughts on cause (I know its been wet) or what we can do do to remedy it. 

I'll try and get him to get a pic.

Cheers

 

 

I cut a bunch of Larch Cladding and left it in a stack without tickers and it went like this. No surprise there. 

 

Ive no real experiance with cladding out in the open air doing this but if he's not planning on putting any preservative on it maybe scrub it down with borax? 

[Macpherson]

After milling get rid of all the dust and paint with a Borax solution this will stop any kind of fungal activity,

Dissolve 1KG of Borax crystals into 5 gallons of warm water and simply paint on the milled lumber....it won't reverse fungal staining but should stop it and prevent it from getting worse.

 

Borax, Sodium Tetraborate Decahydrate. Perfect for Slime

WWW.EBAY.CO.UK

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Sodium Tetraborate Decahydrate (Borax). Sodium Tetraborate Decahydrate Information. SODIUM TETRABORATE DECAHYDRATE (BORAX). Borax is marketed as a green...

 

[wills-mill]

It could well be that your 6 month old log simply has nice summery sugars in the sapwood.

I really noticed it on a softwood for the first time this year with a young-ish set of lengths from a Cedar of Lebanon that was felled in the middle of some absolutely baking August weather. The whole of the sapwood has gone very black, and I'm guessing it's the influence of all the sugars and starches being readily available for mouldy little blighters.

I've avoided any summer felled polite/white hardwoods for quite a few years for this reason, but it is unusual to notice on a softwood. I'll try and grab a photo of the Cedar later. W