Who Really Uses Exterior Insulating Sheathing?

exterior sheathing imagePlasti-Fab

The correct answer is, people who are looking to improve the energy efficiency of their homes and save on energy costs, and truly, who DOESN’T want that?

People are continually looking at different ways to increase their energy efficiency and decrease their energy costs. So what do they do? Replace windows and doors. Well that’s a great start, but what about all that space between your windows and doors? How much energy do you think is leaving through your walls every day? Parents are always after their kids to shut the door so we don’t let the heat or cool air out but in reality, you could be losing up to 33% of your heating and cooling through your walls each day due to thermal bridges caused by the wood studs that frame your wall.

So how do we solve this problem? That’s where CONTINUOUS exterior INSULATING sheathing OVER THE EXTERIOR OF YOUR FRAMED WALL comes in. Think of CONTINUOUS exterior INSULATING sheathing as MONOLITHIC blanket that you wrap around your home, keeping the temperature stable, and increasing the energy efficiency.That’s where continuous exterior insulating sheathing over the exterior of your wood framed wall comes in. Think of exterior insulating sheathing insulation a monolithic blanket that you wrap around your home, keeping the temperature stable, and increasing the energy efficiency. If this is something you want to pursue to save on energy costs and improve the overall comfort of your home, let’s take a look at EPS rigid insulation as a solution

DuroFoam Exterior Sheathing Retrofit (3)

It is more cost effective and time effective to increase the R-value of your above grade wall by insulating from the outside in then from the inside out. Make sure you check your local building code; see what they have for rules, requirements and restrictions. This will save you from problems later on.

We have a good selection of rigid insulation that can be used as continuous exterior insulating sheathing. By adding PlastiSpan, PlastiSpan HD, EnerSpan or DuroFoam/DuroSpan insulation to your home we will increase your energy efficiency and decrease your costs. Just for easier reading, all insulation will be called PlastiSpan/EnerSpan insulation from here on, but any of the 5 products mentioned above is the right insulation solution for this application.

A little overview of the 5 types so you can chose the best for your application

  • PlastiSpan insulation has the lowest cost/R-value for rigid insulation
  • PlastiSpan HD insulation gives you a slightly higher R-Value and compressive strength.
  • EnerSpan insulation is an EPS insulation with silver-gray that provides an enhanced R-value
  • DuroFoam and DuroSpan insulation are PlastiSpan or EnerSpan insulation with a laminated film on both sides.

After you have chosen which type of PlastiSpan/EnerSpan insulation you are going to use and have removed all your existing siding, you need to plan out the joints. Apply one of the exterior insulating sheathing over the exterior of the wood framing. All vertical edges of the PlastiSpan/EnerSpan insulation need to be butted tightly together over stud locations for adequate support.


Make sure you are using the correct fasteners. PlastiSpan/EnerSpan Insulation must be fastened to framing using fasteners with heads or washers at least ½” (12.7 mm) diameter where the cladding will be applied directly against the insulation. Fasteners with heads or washers at least 1″ (25 mm) in diameter must be used where an air space will exist between the continuous insulating sheathing and the cladding. (The fasteners are usually a nail with a green washer around it). When you are installing exterior cladding; cladding must be attached to the wood framing members so fasteners need to be long enough to penetrate through the exterior insulating sheathing and at least 1″ (25 mm) into the wood framing.

A separate sheathing membrane is not required if all joints between the exterior insulating sheathing boards are taped using a sheathing tape to seal them.

This should finish off the exterior insulation of your home. New doors, new windows and using continuous exterior insulating sheathing under your cladding, it will make a huge difference on your energy bills every month, plus increase the comfort inside your home. It’s a win-win situation, and who can resist a win-win?

Want to learn more about the products and applications we have talked about here? Take a look at the referenc elinks below for the specific application and product.
Exterior Insulating Sheathing – http://www.plastifab.com/solutions/residential/exterior-insulating-sheathing.html
PlastiSpan Insulation – http://www.plastifab.com/products/insulation/plastispan.html
PlastiSpan HD Insulation – http://www.plastifab.com/products/insulation/plastispan-hd.html
DuroFoam Insulation (Canada) – http://www.plastifab.com/products/insulation/durofoam.html
DuroSpan Insulation (USA) – http://www.plastifab.com/products/insulation/durospan.html

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