InSoFast Cost per Square Foot

Written by: Staff

The InSoFast continuous insulation panels offer a one-step solution, known to be an alternative to the traditional multi-part insulation and framing methods contractors commonly use today, making it a great buy for the average DIY option and quicker installation process in comparison to the traditional methods of installation foam sheets and taping the joints to create an airtight assembly.

The entire system, as per the official website, is known to be a complete system for both moisture and thermal control for all exterior and interior applications.

InSoFast Cost per Square Foot
studs and views” (CC BY 2.0) by RBerteig

How much does InSoFast cost per square foot?

The cost of the InSoFast system depends on a few factors, including the retailer you purchase from, the scope of the job and the type of panels you’re looking to buy since the company does offer a variety of options.  According to the basement cost comparison guide on the official website, the cost of just the materials can range anywhere from $2 to $3 per square foot, with professional installation, if required, increasing the total average to about $4 to $6 per square foot.  Professional installation, again, will depend on a few factors such as the contractor you hire, the scope of the job and your geographical region. notes the system itself will retail for about 40% more than the cost of the plates, studs and foam needed to insulate and frame basement jobs; however, according to the method the author used, he noted you should be able to save slightly less in labor.

According to one member on this forum thread, she was quoted $1.68 a square foot, but the tax credit at the time decreased the price to $1.17 a square foot.

How does it work?

The InSoFast continuous insulation panels, sized 2-feet by 4-feet by 2 inches, have built-in polypropylene studs that allow you to fasten the panels to the wall panels using a construction-based adhesive, allowing anyone to finish a room without the use of any tools — just a utility knife.

Its universal insulation keeps a home cool in the summer months and warm in the winter months due to its 2 to 2.5-inch thickness, UX closed-cell, injection mold EPS foam body that’s able to achieve an R-8.5 insulation score.  Inside, the tightly fitting tongue-and-groove edges help plumb the finish to avoid the use of sealing tape and a body which prevents moisture from getting trapped from inside the walls.  These edges also interlock, allowing you to connect the panels on the ground and then lift them into place to adhere the panels to the wall.

InSoFast reviews

A few people on this thread talked about their experiences with the product, claiming it does work as advertised, noting it was an easy install, they liked the built-in electrical cable chases and the assembly itself helps you lose less square footage in comparison to traditional studs.  The problems, as per some of the responses, included the cost, with some noting it could cost more than studs depending on the job and due to the material of the product, you will not be able to mount a TV unless you modify the product since it cannot support more than the weight of the drywall.  Some also did not like the idea of applying the product directly to the concrete walls.

Ashley, via her blog post on, talked about the ease of the install process, the ordering and the final outcome.  You can view multiple pictures on her blog post to see the product in action.

Where to buy

The InSoFast continuous insulation panels are available via the official website or through special lumber suppliers such as Menards.

Tips to know

If you’re unsure you want to use this system or just curious as to how it works, the official website does offer the opportunity to order a sample panel for $20.  If you do feel the panels are right for your project, the company does note they will refund the price of your panel as long as you buy more than 160 square foot of materials.

The panels, aside from commonly being used in finished basement projects, can also be used to help insulate the concrete slabs beneath the flooring system.  Aside from this, the subfloor sheets can be placed on top of the panels and screwed into fastening strips to help create a floating insulated base for flooring options such as laminate flooring, carpet or wood, for example.

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