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Treating patio building, kiln dried pine
Posted on 2/3/25 at 5:26 am
Posted on 2/3/25 at 5:26 am
We recently built a vaulted pavilion in our back yard using kiln dried pine rough cut beams. What would be the best way to treat the lumber? We’re thinking of spraying it with clear sealant. Would this suffice?
Posted on 2/3/25 at 6:25 am to Nonc Chu Rouge
Guys around here use used motor oil or a mix of motor oil and diesel. This is on rough-cut pine. They just smear it on with a mop. I really have no idea how long it makes it last, though.
Posted on 2/3/25 at 7:50 am to Nonc Chu Rouge
Need more info.
Are the beams exposed? What do you mean by "treated"? What appearance do you want after they are "treated"?
Posted on 2/3/25 at 7:57 am to Nonc Chu Rouge
Posted on 2/3/25 at 11:57 am to 2 Jugs
It’s an exposed beam metal roof outdoor pavilion on a slab. 10x10 post. It has roof but everything is exposed to bugs and humidity and wind blown rain. All kiln dried pine. I’m wondering what I should treat it with to help with moisture and bugs. Stain, water sealant, I’ve seen some people burning it with some Japanese technique, etc..,
Posted on 2/3/25 at 12:03 pm to Nonc Chu Rouge
Here’s a picture for reference. Would rather not stain it. It would be easier if I could spray it on and stain would make a mess on concrete and metal roof. Would clear sealer work? 

Posted on 2/3/25 at 6:40 pm to Nonc Chu Rouge
quote:
Would rather not stain it
Stain does nothing to protect wood from water penetration.
You really should have thought about this before erecting the structure.
I would use a water-based sealer and brush it on. General Finishes makes a good exterior finish or Thompson Waterseal. Also heard of using transmission fluid to seal rough cut lumber. You will probably have to reapply every few years to keep it looking good.
Make sure to take the 45° angle braces of and hit that end grain really good. The ends of the ridge beam are gonna need attention.
If you have some leftover cutoffs, use them for testing which product looks the best for your liking.
Posted on 2/3/25 at 8:13 pm to 2 Jugs
We used to use transmission fluid back in the eighties. Gave the building a beautiful red tint. Problem was it faded rather quickly and no
Ended to be reapplied every couple/three years.
Ended to be reapplied every couple/three years.
Posted on 2/3/25 at 8:40 pm to Nonc Chu Rouge
quote:
using kiln dried pine
Why?
Posted on 2/4/25 at 5:22 am to Nonc Chu Rouge
You could use a clear deck oil. Usually it is rated for water on horizontal surfaces.
Posted on 2/4/25 at 8:10 am to Tigerpaw123
quote:
Why?
That's my question too. With lumber pre-treated for outdoor use and rated to resist rot and bug infestation, why use regular pine---------------at least he used the metal brackets at the base of the posts to help keep the bottom of them slightly off the ground. Even then, he should have painted or treated the bases of those posts with paint, varnish, old motor oil so they can't absorb moisture through the end grain.
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