Building barn - questions about treated lumber

Reply

  #1  
Old 04-10-07, 07:13 AM
martin_30's Avatar
Member
Thread Starter
Join Date: Dec 2001
Location: Pennsylvania
Posts: 142
Received 0 Votes on 0 Posts
Building barn - questions about treated lumber

Besides the mudsill and floor joists what else should be treated wood vs. untreated?
 
Sponsored Links
  #2  
Old 04-10-07, 09:22 AM
M
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 47,543
Received 300 Votes on 266 Posts
A lot depends on how it is constructed and how it will be used.

Generally you use PT wherever it will have contact with the ground or masonary. Moist conditions often warrant use of PT.
 
  #3  
Old 04-10-07, 09:43 AM
B
Member
Join Date: Mar 2006
Location: Great Barrington MA
Posts: 532
Received 0 Votes on 0 Posts
Also bare in mind that PT has different ratings. Some is rated for ground contact and some isn't
 
  #4  
Old 04-10-07, 11:37 AM
Join Date: Dec 1999
Location: South Dakota
Posts: 3,140
Received 0 Votes on 0 Posts
Instead of what you call green treated lumber, I would use Foundation Treated lumber. It is a special type of green treated lumber. A little more expensive, but will last at least 50 years, whereas regular green treated with what your using it for will only last about 20 years. Good Luck
 
  #5  
Old 04-10-07, 12:42 PM
W
Member
Join Date: Feb 2006
Location: USA
Posts: 6,706
Received 17 Votes on 16 Posts
Treated Lumber

Do not use treated lumber where there is the possibility that your farm animals could come in contact with it. Good luck.
 
  #6  
Old 04-11-07, 04:20 AM
martin_30's Avatar
Member
Thread Starter
Join Date: Dec 2001
Location: Pennsylvania
Posts: 142
Received 0 Votes on 0 Posts
No farm animals near this barn. Should I use treated plywood for the sub floor?
 
  #7  
Old 04-11-07, 05:54 AM
M
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 47,543
Received 300 Votes on 266 Posts
PT plywood is fairly expensive. How close to the ground will the floor be? Is it expected to get wet repeatedly?
 
  #8  
Old 04-11-07, 06:24 AM
Join Date: Dec 1999
Location: South Dakota
Posts: 3,140
Received 0 Votes on 0 Posts
Martin 30: Let me inject a few things here. First of all your sills or anything that touches the ground should be foundation treated lumber. This will not hurt any animals. Now for the floor. Most barns either have a hard packed dirt floor or a concrete floor. for those barns that do have a wood floor, the lumber used is usually 3" by 12" . This lumber goes by the name of bridge planks. They are usally oil soaked, or creasoted. These will not hurt animals either. Very expensive lumber. Any wood on a barn floor is usually not a good thing. It will rot sooner or later. My company has worked on alot of barns and built quite a few of them also. Only one had a wood floor. The others were either dirt or concrete. Hope that this helps.
 
  #9  
Old 04-11-07, 07:44 AM
martin_30's Avatar
Member
Thread Starter
Join Date: Dec 2001
Location: Pennsylvania
Posts: 142
Received 0 Votes on 0 Posts
Perhaps my poor use of terminology is envoking the wrong thoughts. My "barn" (sorry that is what my family calls a shed) is a 192 sq ft. storage shed.

The foundation is an on grade foundation using solid concrete block. The wood subfloor will sit about 6" above the ground. One of the books I have calls for ACX plywood (which is treated wood, right?) but I have seen and heard many people using regular 3/4" t&G plywood for the subfloor in their shed.

Thanks and soory for the confusion of terms.

Martin
 
  #10  
Old 04-11-07, 10:53 AM
M
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 47,543
Received 300 Votes on 266 Posts
Is there any ventilation under the wood floor?

If I'm not mistaken ACX is a higher grade of plywood - 1 side sanded, no blemishes.

CDX should be fine [has ext glue]

My main concern would be moisture being trapped under the floor - maybe lay plastic down on the ground.
 
  #11  
Old 04-11-07, 12:13 PM
Join Date: Mar 2005
Location: USA
Posts: 6,130
Received 0 Votes on 0 Posts
Building barn - questions about treated lumber

A wood floor 6" above dirt with little or no ventilation is an invitation to rot and replacement. Poly will help a little, but in some cases it can hurt depending on the climate.
 
  #12  
Old 04-11-07, 12:40 PM
martin_30's Avatar
Member
Thread Starter
Join Date: Dec 2001
Location: Pennsylvania
Posts: 142
Received 0 Votes on 0 Posts
So, I should go with the treated plywood?
 
  #13  
Old 04-11-07, 05:32 PM
M
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 47,543
Received 300 Votes on 266 Posts
Are there any foundation vents?

PT helps in damp conditions but even PT has it's limits. PT submerged in water will hold up better than constant damp conditions.

Would it be a problem to either raise the wood floor or lower it and use concrete?
 
  #14  
Old 05-04-07, 08:45 PM
M
Join Date: May 2007
Posts: 11
Received 0 Votes on 0 Posts
cuts and selection

treat all end cuts and bore holes with the appropriate preservative.
select PT by weight, the heavier the boards the greater the penetration of preservative=good. pick up a "lite one" and when you cut it you will see alot of untreated wood in the middle.
 
  #15  
Old 05-17-07, 11:14 PM
C
Member
Join Date: Nov 2005
Location: Las Cruces, NM -Zone 8
Posts: 289
Received 0 Votes on 0 Posts
Ignore

Sorry - meant to start new thread
 
Reply
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: