Dec 05, 2019

Top 5 Rookie Mistakes Made During DIY Spray Foam Insulation Projects

Having been in business for over 40 years, there are countless scenarios where Lindus Construction has been called upon to fix expanding foam fails caused by inexperienced contactors and homeowners that waved the white flag on DIY projects.  When it comes to insulation, there are many missteps that can have detrimental long-term consequences.  Here’s a list of cardinal sins that those unfamiliar with spray foam insulation can commit.

Mistake #1: Selecting A Cheap Spray Foam Material

Not all spray foams are created equally.  Those of a lesser quality fail to adhere to the surface they’re being installed on.  If moisture levels are incorrect, there can even be spray foam insulation mold problems and mildew growth.  To learn more, check out this guide on open cell vs. closed cell spray foam insulation.

insulation and ventilation

Mistake #2: Incorrect Mix Of Spray Foam Chemicals

For the chemicals in expanding foam insulation to stick to the area they’re being applied to, they must be properly mixed on-site at the correct ratio and temperature.  Equipment must be correctly calibrated and be in good working order.  Tell-tale signs that the spray foam was not mixed properly include lingering smells and waxy debris.  Furthermore, improper installation can have lingering consequences that are dangerous to your health. Spray foam headaches, breathing problems, and skin and eye irritation can be the result of being exposed to chemicals before it has had a chance to set.

Mistake #3: Ignoring A Layered Approach For Correct Spray Foam Insulation Thickness

Foam insulation must be installed in a quick, even, controlled manner.  A common rookie mistake is not understanding that the insulation must be installed in layers and that each pass needs to expand and cool before another can be added.  Varying from this means the first layer may not have as much volume as it should, making the foam less effective and contributing to higher long-term energy costs.  There’s also risk of a perpetual, pungent odor because the spray foam became too hot.

spray foam

Mistake #4 Rushing Through The Job Can Cause Long-Term Insulation Issues

Spray foam insulation issues can stem from rushing through the application.  This can create rifts and even leave spots that have been missed, which will create unnecessarily high energy bills.  This makes it important that you don’t pressure a spray foam insulation contractor to move you up on their schedule or quickly complete the work once they arrive at your home.

Watch An Insulation Project Recently Completed by Our Insulation Experts:

Mistake #5: Skipping Necessary Spray Foam Insulation Preparation Steps

Before the insulation dries, the consistency  is like that of heavy glue or paint.  Upon contact, spray foam is designed to suction itself to the surface it’s sprayed on and then expand.  Even reputable installers can have issues with overspray.  Recognizing this, they go out of their way to clear rooms of furniture, wall hangings, light fixtures, etc. Items that cannot be moved should be shrouded to protect from overspray.  Once spray foam is applied to an incorrect surface, it can be impossible to fully remove.

Browse Our Insulation & Ventilation Installations:

Insulation & Ventilation Reviews:

“Thank you to the entire team for the outstanding job on the insulation job of my 100-year-old home!  Eric took the time to walk me through the entire process and even came back a second time to sort out venting questions.  Project manager, Randall, made sure the insulation installed met your quality standards.  Every member of your team worked very hard and didn’t end their day until the job was done right.  I look forward to energy savings and no critters in my attic!”

Pat M.
Bloomington, MN
July 26, 2022

"We used Lindus for a rather complicated attic re-insulation project. They are highly competent and do great work!"

Leon P.
White Bear Lake, MN
July 16, 2022

"Jason and the insulating crew did a great job. I told Jason it looked like nothing was done when he finished cleaning, which is a very good thing.  The insulating crew did have a difficult time working under the bay window. They usually hold their spray gun about 2 ft. away from the surface. In our location, they only had a foot at the most. So, there was a lot of blowback, clean-up, and additional layers to get the final result."

Jerry P.
Eden Prairie, MN
June 16, 2022

"They were contracted to insulate the garage ceiling which they did in a two-step process with both foam and blown-in insulation. They then returned to put up new gutters facia and soffits in a two day process that was professional, neat , and used materials economically."

Stephen G.
MInneapolis, MN
April 28, 2022

"Excellent and efficient work. Thankful that the Lindus crew was accommodating to our needs as homeowners and for their communication throughout."

Bloomington, MN
April 19, 2022

"Had Lindus blow in foam insulation into attic, what a difference it’s made! The house is noticeably warmer in the winter and my furnace is not running nearly as much as before. I know it will also help keep the house cool in the summer heat. They also installed some new windows and exterior trim. Everything turned out really well. Corey Hessler was fantastic in dealing with from start to finish and answered all my questions. Everyone I dealt with from Lindus, especially Corey, were kind and professional. In today’s day and age you get what you pay for. Lindus really delivers!"

Robert M.
Cottage Grove, MN
March 25, 2022
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