Feb 14, 2014

The Real Deal with Insulating Vaulted Ceilings

Vaulted, or also known as cathedral ceilings, offer a very aesthetically pleasing appearance adding a luxury of height, comfort and light into your home, but they can also pose some interesting challenges when it comes to insulation. Since you know that heat rises, vaulted ceilings in your home cause you to heat space that you can’t really feel; unless you have ceiling fans pushing that warm air back down. Here are some things to keep top of mind.

New Windows St. Paul (2)

Moisture Control

In very cold climates, like ours here in Minnesota & Wisconsin, having a poorly insulated roof can cause the common phenomenon known as ice damming. The process of thawing and refreezing produces a thick layer of ice at the eaves and then water backs up on the roof and eventually leaks into your home. Not controlling the moisture in your ceiling can lead to a variety of problems including, but not limited to, mold and rotting. You want to have an air space beneath the roof deck with air vents at the eaves and ridge to carry away moisture. Watch the humidity levels in your home as the days get colder you want less humidity every time your furnace adjusts humidity levels down in your attic or crawl spaces.

What Type of Insulation?

Closed cell spray foam is the best choice for vaulted ceilings because it does not absorb water and is currently the best air sealing on the method on the market. Spray foam insulation not only insulates, but it also strengthens whatever material it adheres to.  Spray foam has an amazing R-value of R-6.5 per inch, creating a very well insulated space. You can also use cellulose, Rockwool, fiberglass blankets, blown fiberglass, denim blankets and Basa Batts, just keep in mind that some air and moisture will be able to pass through these types of insulation.

Here’s How We Were Able to Correct This Home’s Nonperforming Insulation & Ventilation: 


You want to have optimal ventilation in your cathedral ceiling allowing air flow space between the insulation and the roof deck. Depending on where you live, it is recommended to leave some practical space for ventilation and that amount of space has been the subject of debate for years with some codes stating it requires a minimum of 1” and some say ½” will suffice. The best form of ventilation is utilizing a combination of eave, also known as soffit vents, and ridge vents for continuous ventilation allowing movement of air and minimizing moisture problems, which will in turn prolong your roof life.

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Insulation Reviews:

"Would highly recommend."

Jerry K.
Shoreview, MN
September 26, 2019

Everyone (the steel roofers, spray foam installers, and LeafGuard® installers) was very professional yet personable and friendly. They did a great job while overcoming some difficult problems presented by my old 1 1/2 story house.

Jack H.
Minneapolis, MN
September 11, 2019

"Second time we have worked with Lindus and we would choose them again if we have another project."

Steve B.
Golden Valley, MN
July 14, 2019

"Our experience with Lindus was and is terrific! We would recommend you to our friends anytime.  Thanks so much for being there for us."

Leon & Alma S.
Golden Valley, MN
April 5, 2019

"I had you guys insulate, install SeasonGuard windows, gutters, 2 bath fans, renew deck railings, wrap and steel side the house. I got my bill from CenterPoint, and find it interesting that I use 10 percent less gas than my efficient neighbors. I guess they really aren't that efficient! Thanks Lindus!"

Alan M.
Apple Valley, MN
February 18, 2019

"I have been incredibly pleased with all the work that Lindus has done at my home roof, gutters, insulation, egress window, and 3 major remodels over the years. I'm a great fan of Lindus and all the people that work with and for them. Plus follow up is outstanding if there are questions.  I am an extremely happy customer, and looking forward to my next project with Lindus."

Annette A.
St. Louis Park, MN
February 25, 2019
75% Off installation labor on LeafGuard® Brand Gutters and GAF Asphalt We are also offering a complimentary heat map analysis with insulation estimates through May 2022.
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