LumberJocks

HOW DO I SEAL DOUGLAS FIR BEAM?? HELP!!

  • Advertise with us

« back to Wood & Lumber forum

Forum topic by ranger posted 05-21-2011 05:45 PM 10166 views 0 times favorited 5 replies Add to Favorites Watch
View ranger's profile

ranger

3 posts in 2025 days


05-21-2011 05:45 PM

Topic tags/keywords: question

Hello everyone,
I am new to this but I sure need some good advice. My wife and I are adding on to our home. We ordered douglas fir beams out of S. Dakota. The beams are hand hewn and were cut out of standing dead timber. I received the beams last August and stained them. I stacked them in my garage and they have dried and checked. Some of these beams will go inside the house and some will go outside and be exposed to some weather on the porches. How do I seal the beams so that they look like they are 100 years old and at the same time prevent the outside beams from deteriorating in the weather. Restaining the checks is not a problem, I just don’t know how to seal the beams. I have read about a 50/50 mixture of boiled linseed oil and turpentine. Is this the best to use?

Thanks in advance,
Tom


5 replies so far

View patron's profile

patron

13535 posts in 2804 days


#1 posted 05-21-2011 06:12 PM

tom

first
welcome to LJ’s

this is what i have found
it is like the stuff
(maybe the same)
they pressure treat with

i get it at the local hrdw. store
there is another brand
called woodlife
but it only has half as much copper in it
it’s good for termites and mildew

the deck has had 4 coats
with a sloppy mop put on it
it is green for about a month
but turns to barn board in the sun
or clear inside

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View ranger's profile

ranger

3 posts in 2025 days


#2 posted 05-21-2011 10:35 PM

Dan,
Thanks for the information. I have never heard of this preservative.

View Tennwood's profile

Tennwood

107 posts in 2644 days


#3 posted 05-21-2011 11:11 PM

We have a timber frame house built out of doug fir, built 3 years ago in Eastern Tennessee. The inside and outside were stained and then finished with poly. Not sure what kind but I think Sherwin Williams. Except where the sap continues to bleed out and needs to be cleaned (steel wool) off, we shouldn’t have to deal with the interior timbers for a long time, if ever. The outside posts and beams for the porches are starting to wear down where the sun beats on them and will need to be refinished next year. Otherwise it is holding up pretty well. The only other problem is the carpenter bees have taken a liking to the taste in places. I talked to reps at local the Sherwin Williams store and a local painter, and they said there isn’t a lot you can do about either. No stain or finish holds up to the sun for more than a few years, and the bees will acquire a taste for the wood eventually, no matter what you put on it. As far as keeping the antique look of the wood, not sure, other than not to stain them.

If you have a log home or timber frame dealer in the area, you may want to talk to them.

Good luck

-- Jim, SE Tennessee, "Don't spare the kindling Dear, we have plenty"

View MrRon's profile

MrRon

3926 posts in 2706 days


#4 posted 05-22-2011 08:08 PM

Boiled linseed oil and turpentine would probably work, but I don’t like the idea of having this flamable mixture associated with a house. Any finish will eventually deteoriate in the weather, something that wooden boat owners have had to contend with forever. Some kind of preservative that soaks into the wood would be my guess, like the one suggested by Tom

View hObOmOnk's profile

hObOmOnk

1381 posts in 3590 days


#5 posted 05-23-2011 01:02 AM

When I work with beams, new or aged, I cut a Japanese-style kerf, called a sewari, the length of the beam. This is a sacrificial split that relieves the natural splitting tension in the wood. The sewari is usually cut on the side that does not show.

For outdoor finishing, I use Sikkens Cetol products.

Hope this helps…

-- 温故知新

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com