Dumb question: Yellow CLS Rot Resistance

[Nelsun]

The yellow treated CLS framing stuff - how rot resistant is it compared to standard tanalised rough sawn? To be clear (oh Lord I sound like a politician saying that :roll: ) this is the stuff I'm on about:

I've Googled to no avail. My local wood yard and neighbour who's just built his own mega-house near single handed both said it's plenty fine for framing a shed. Is it as resistant but just more expensive? Apologies for the question but I've always had it in my head that tanalised would be more resistant.

 

[g7g7g7g7]

Yellow die is low pressure treatment it's fine for stuff that might get damp like framing the walls, but for stuff that's exposed to the outdoors like a shed floor I'd definitely go with Tanalised it's far more resistant to rot, there's a fair bit of difference in how long this stuff is designed to last and what it's supposed to be exposed to.

 

[Nelsun]

Thanks for that. Figured as much but never could get a definitive answer.

Sent from my Nexus 6P using Tapatalk

 

[Woody2Shoes]

I'd be surprised if it's treated at all TBH. In my experience EW/ER timber (basically farmed spruce) will rot whether or not it's been pressure-treated, if wet enough. The trick is to avoid getting it wet from rainwater or from condensation, and to provide ventilation to keep it dry. That said, I wouldn't use untreated stuff for structural things like rafters and walls, but I'd be happy enough to use it "indoors" for non-structural things. Cheers, W2S