Tag Archives: plastiskirt

Avoiding Using Pressure Treated Wood

Avoiding Using Pressure Treated Wood

Pressure preservative treated wood remains a mainstay in modern wood construction. United States’ manufacturing and sales of pressure treated wood has become a multi-billion dollar industry. Even with all of this, there are some skeptics.

Reader DIANE in MORGANTOWN writes in:

“ I want to avoid pressure treated wood. Even the newer and safer versions. Can any alternate material be used? Concrete? Metal? Thank you!”

I personally have full faith in current formulations of pressure preservative treatment chemicals for wood to be both environmentally friendly, safe for myself and my loved ones, and to provide excellent longevity. With this being said everyone should do their own due diligence of any product and develop their own opinions based upon such research.

From 2015 IBC (International Building Code):

“2304.12.2.2 Posts or columns.

Posts or columns supporting permanent structures and supported by a concrete or masonry slab or flooring that is in direct contact with the earth shall be of naturally durable or preservative-treated wood.

Exception: Post or columns that are not exposed to the weather are supported by concrete piers or metal pedestals projected at least 1 inch (25mm) above the slab or deck and 8 inches (203 mm) above exposed earth and are separated by an impervious moisture barrier.”

Column holes can therefore be completely concrete filled with wet set brackets placed on top of concrete allowing use of untreated wood columns (as long as column isolated from concrete per Code or weather  protected, it does not have to be preservative treated). https://www.hansenpolebuildings.com/2012/09/concrete-brackets-2/

A splash plank will be required around post frame building base in order to provide a form for any concrete slab poured upon grade and/or to be an anchorage point for siding. Typically this a pressure treated 2×8. In your case, an untreated board of cedar or redwood could be used, as they are somewhat naturally decay resistant. I would recommend either be encased in a Plasti-skirt (https://www.hansenpolebuildings.com/2017/08/plasti-skirt/) as untreated cedar or redwood has a lifespan much shorter than treated wood.

 

 

 

The Case of the Termite Shields

When it comes to post frame building construction, I know a little bit about a lot of things. I get asked a lot of questions about how to solve post frame building challenges and do a pretty fair job of answering them. When I do not know an answer I feel confident in, I have no problems with doing the research or reaching out to an expert. Such was the “Case of The Termite Shields” (sound almost like a Sherlock Holmes story).

In this case, I went to “The Bug Doctor” Jerry Schappert of www.pestcemetery.com

Here was my question:

mr owl tootsie roll pop“We have a Building Official asking for a termite shield for a post frame (pole) building. The building utilizes pressure preservative treated columns embedded in the ground with a treated splash plank around the base of the walls. At the bottom of the steel wall siding is what is known as base trim, it is steel and extends outward from the splash plank 1-1/2″ with the outer edge being a downward bent lip. This should serve to function just like the steel termite shields we have viewed online. 4-5/8″ of the pressure preservative treated splash plank is visible below the base trim. There is a product called a plastiskirt which is vinyl and designed to wrap the splash plank. In your opinion, what would be the best design solution to protect the building from termites as well as to meet the requirements of the Building Code?”

The good doctor replied (in very short order I might note):

It sounds to me you’ve met the code already? What more does he or she want?  There are ‘pipe shields’ on the market but they are just basically what you describe. Pole barns here in Florida basically have very little code requirements and we are the termite capital of the world.  So without knowing what more the inspector is looking for I wouldn’t know how to answer.

Need a bug expert, try Jerry. Need a post frame building expert? I will give my best impression.

 

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