Insulating Steel Building - Building & Construction - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread
Display Modes
Old 11-06-2010, 07:19 AM   #1
Newbie
 
Join Date: Nov 2010
Posts: 3
Rewards Points: 10
Default

Insulating steel building


This thread was rejected by contractor talk for some reason, perhaps someone here can help:
Odd job for me. I have a 24 x 36 steel buiding, which is actually a fully enlosed carport. The job I was asked to to is insulate and finish, having no real experience on metal buildings I am looking for help. The building specs are
24' deep
35' wide
10' walls
The support structure is 5' on center, 2 1/4" square tubing with a mid bar at 5' as well.
My plan is to rip 2x4's to 2 1/4" and frame the openings at 2' on center, insulate, then attach plywood/osb for the interior and paint.

My question is about vapor barrier, does it need to be applied to the exterior between the insulation and the exterior metal wall or can I simply use regular that one would use in a house, apply a vapor barrier between it and the the wood interior wall. For electrical boxes I will be using sealed boxes. I am told the garage will eventually have heat and a/c. The climate in Southern Virginia, near the coast.

For the roof, simply using 2" foam board. This is a lightly used shop, mostly for recreational car repairs and tinkering.

Any help will be greatly appreciated
Attached Thumbnails
Insulating steel building-garage1.1.jpg  
danno676 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-06-2010, 12:41 PM   #2
Newbie
 
Join Date: Nov 2010
Posts: 7
Rewards Points: 10
Default

vapor barrier


personaly i would do all the framing elec. insulating ect. the put visqueen plastic over all the framework the drywall/osb/plywood that i think should do it, is the building heated? if not, i wouldnt isulate or vapor barrier there is no point no you dont need anything on the inside of the outside wall

Last edited by porky150; 11-06-2010 at 12:43 PM. Reason: i dont think i aswered the basic question
porky150 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-06-2010, 01:12 PM   #3
Enough is Enough
 
H. A. S.'s Avatar
 
Join Date: Aug 2010
Posts: 80
Rewards Points: 75
Default


I have a similar pole barn. Using 1.5" pink insulation board, Visqueen, then 3/8" plywood for the inside walls. Wood furnace for heat.
H. A. S. is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-06-2010, 09:26 PM   #4
Newbie
 
Join Date: Nov 2010
Posts: 3
Rewards Points: 10
Default


There's no heat or ac at this time, but plans are to have it installed eventually.

Thanks for the replies, I expect to use the fiberglass batts/rolls on the walls after framing and electrical, followed by a VB. On the roof I will be using the board insulation board for weight reasons and a much easier installation.
danno676 is offline   Reply With Quote
Old 11-09-2010, 10:13 AM   #5
DIY
 
Join Date: Nov 2010
Location: Iowa
Posts: 4
Rewards Points: 10
Default

Vapor barrier rule of thumb


The vapour barrier should always be toward the warmer, conditioned air to prevent the warm moist air from migrating through the walls and then making it half way through...cooling, condensing and causing all kinds of problems like mold & mildew and reducing R-value in your fiberglass insulation....also, be very choosey in which insualtion board to use....look for an extruded polystyrene that has a high R-Value per inch....if you you uses this type and tape your seams or the foil backs tuff-R with taped seams it should act as a vapour barrier and no platic is needed....
Dallasjohn is offline   Reply With Quote
Old 11-09-2010, 10:58 AM   #6
Newbie
 
Join Date: Nov 2010
Posts: 3
Rewards Points: 10
Default


Quote:
Originally Posted by Dallasjohn View Post
The vapour barrier should always be toward the warmer, conditioned air to prevent the warm moist air from migrating through the walls and then making it half way through...cooling, condensing and causing all kinds of problems like mold & mildew and reducing R-value in your fiberglass insulation....also, be very choosey in which insualtion board to use....look for an extruded polystyrene that has a high R-Value per inch....if you you uses this type and tape your seams or the foil backs tuff-R with taped seams it should act as a vapour barrier and no platic is needed....
So, to understand you correctly, if the inside is heated then moisture barrier on the inside. Makes sense. Insulate the top and tape, definately a high R value there as that will a major energy loss area.
danno676 is offline   Reply With Quote
Old 11-09-2010, 11:09 AM   #7
DIY
 
Join Date: Nov 2010
Location: Iowa
Posts: 4
Rewards Points: 10
Default

Vapour barrier


Yes...Tuff-R (the Dow chemical company makes an insulation board that is foil faced and and reports an r-value up to 6.5 per inch...whic is as good or better than some of the spray foam....probably not as tight for air infiltration, but having said that if the seams are taped with an aluminum tape and installed between the studs tightly, it pretty cost effective. The good thing about the Dows product, its availble at most box stores....
Dallasjohn is offline   Reply With Quote
The Following User Says Thank You to Dallasjohn For This Useful Post:
danno676 (11-09-2010)
Sponsored Links
Advertisement
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Getting Steel Plate Flush with Concrete Floor MrBill_DIY Flooring 7 11-29-2009 08:54 AM
Insulating basement ceiling - your recommendations? jtmann HVAC 8 11-24-2009 04:44 PM
firring out concrete wall for electric and insulation trouble Building & Construction 9 02-04-2009 11:40 AM
furring question in steel building madjuna Carpentry 2 02-01-2009 10:47 AM
building a second story concrete balcony construction newbie Building & Construction 5 01-28-2008 06:00 AM




Top of Page | View New Posts