Tag Archives: Venting

Types of Construction, Sliding Doors, and Roof Vents

Today the Pole Barn Guru visits with readers about, types of construction, sliding doors, and roof vents.

DEAR POLE BARN GURU: Hello Mike – I am working with the NFBA on a study of the post frame (pole barn) building market in the US. Among our objectives is to understand what % of construction in a given geography, sector (residential, commercial, etc.) is post frame vs. other types of construction.

In order to do that, we need to define the major types of construction. So, the question I have is:

In addition to post-frame, what are the MAJOR types of (or methods for) building construction?

So far, it seems like there is:

  1. Post frame (pole barn)
  2. Stick frame (stud wall)
  3. Metal frame
  4. What else?

Any direction or insight you may have would be greatly appreciated. Please let me know if you have a direct phone line that I could call you on.


DEAR BERT: Thank you for reaching out to me, am glad to assist.

#2 should be wood stud wall

#3 might be best divided into structural steel (“red iron”) or steel stud

Concrete tilt up (either precast or cast on site)
ICF (Insulated Concrete Forms)
SIPs (Structural Insulated Panels)
Straw bale


DEAR POLE BARN GURU: All we are looking for is a total width of 8 foot steel sliding barn doors for our garage instead of standard garage door. Is that possible? BARB in DOVER

DEAR BARB: Possible? Most certainly, however unless you are going to make a serious investment in an opener(s) for your door(s) you will quickly grow tired of having to manually open and close them. For information on openers for sliding doors, please read: https://www.hansenpolebuildings.com/2017/04/propel-electric-door-openers/


DEAR POLE BARN GURU: I will be putting a plumbing vent through the roof after the building is up. Does Hansen have any recommendations or suggested methods for this? From what I’ve read, a boot and lots of silicone is the normal way. JAMES in LEBANON

DEAR JAMES: I’ve used these with great success and no caulking: https://www.hansenpolebuildings.com/2012/09/dektite/ plus Justine can get you a price on them, if you provide quantity and diameter of the pipes. In the event you do feel the need to caulk a suggested caulking is TITEBOND Metal Roof Translucent Sealant available at The Home Depot®.








Insulation, Snow Loads, and Best Choice for Condensation

The PBG answers questions about insulation, snow loads, and best choice for condensation.

DEAR POLE BARN GURU: I am wanting to finish the interior of my pole barn and have an cathedral like ceiling. If I were to follow the trusses up to the peak with foam board Insulation and use 2x4s spanning between the trusses for support would there be enough air flo between 2x4s and metel to prevent condensation? If not is there a way. I have a ridge vent along peak and soffit vents on both sides of 1ft eves. Thanks for taking the time to answer. TIM in PORTAGE

DEAR TIM: To begin with, I will surmise you have either a rather typical Midwest style post frame (pole barn) building with trusses spaced every four feet on top of “truss carriers” (headers) or a building with single trusses widely spaced somewhere from seven to 10 feet on center.

foam insulation installation

You have a couple of choices – if you are going to utilize the existing intake (soffit vents) and exhaust (ridge vents) then a minimum of one inch of clear airflow must exist above the insulation. The high ribs of the roof steel will not provide adequate ventilation and there is really no way to create it after the fact. An alternative would be to seal the vents and use closed cell spray foam on the underside of the roof system. The closed cell foam should take care of any condensation concerns from the underside of the roof steel and it provides approximately an R 7 insulation value per every inch of thickness.


DEAR POLE BARN GURU: Can your building be designed to handle a 40# snow load? 24 x 30. JIM in WISCONSIN RAPIDS

DEAR JIM: Any snow load is very possible to be designed for, even those at high altitude snow ski resorts (including this one: https://www.hansenpolebuildings.com/2014/04/2014-winter-olympics/). Besides the snow loads in excess of 200 pounds per square foot at ski resorts, I’ve also provided post frame buildings in places like Glacier National Park, where the snow is so deep the park roads close for months in the winter.


DEAR POLE BARN GURU: I am planning on a 24x48x12 steel truss pole barn for vehicle/toy storage. Would you recommend a radiant bubble material under the metal to keep the inside of the barn for becoming a convection oven sitting in the hot Florida sun? Best wishes, JOHN in FLORIDA

DEAR JOHN: My first choice would be closed cell spray foam. While it is going to be more expensive, you will save greatly in labor as opposed to using a radiant reflective barrier. Radiant Reflective Barrier, installed correctly, might give you the performance you are seeking. If you do go with the barrier, single cell will perform pretty much as well as single cell. Buy six foot wide rolls with a tab. The tabs should have a pull strip over adhesive, which eliminates the need for taping seams. The six foot wide rolls mean fewer pieces to handle and overlaps to seal.