Dec 07, 2016

How Proper Insulation & Ventilation Create a Long-Lasting Roof

One of our crews was called to a St. Paul, MN home earlier this week to complete what the client thought would be a minor roof repair.  However, once we began work, the work itself was anything but minor.  Why?  Inadequate roof ventilation.  The importance of working with a contractor that treats your roof as an entire system cannot be stressed enough.  Ignoring the important role insulation and ventilation play in the vitality of a roof has serious ramifications.

Three Consequences of Inadequate Insulation & Ventilation: 

Corrosion: Incomplete roof ventilation and attic insulation will result in high levels of moisture.  The result is decay in the roof deck, supports, shingles, and underlayment.

Ice Dams: An ice dam is a ridge of ice that forms on roof edges and curtails melting snow from filtering off the roof.  This can lead to serious consequences, such as water backing up into the home and causing interior damage.  The correct amount of insulation and ventilation is the best way to prevent ice dams.     

Rust: A disproportionate level of moisture due to subpar ventilation can cause roof vents and flashing to rust.  This can also cause the thousands of nails used to apply a roof to begin to detach from the roof as well.

Don’t Install a New Roof Without Fully Understanding the Warranties That Accompany It:

What You Need to Know Before Installing a Hot Roof: 

In a traditional configuration, attics have both insulated flooring and ventilation.  Outside air has the ability to filter in through the soffits and exit through the top of the roof which creates a cold attic during the winter.  This method curtails ice dams by keeping a roof’s temperature cooler.

A hot roof differs because it has spray foam insulation directly affixed to the roof sheathing, thereby eliminating ventilation.  Temperatures in attics of homes with a hot roof are increased because without ventilation, the thermal envelope has shifted to the underside of the roof.  Though the temperature increase may only be a few degrees, industry studies have shown that those degrees make a difference.  Shingle lifespan can be lowered as much as 10%.  Shingles on hot roofs are also more likely to fade.  This has led many roofing manufacturers to extend minimal warranties to hot roofs, citing that they do not adhere to the insulation standards the shingles were designed for.  Before installing a roof, it’s also wise to verify if your municipality even allows them.  Bear in mind that even if they aren’t outlawed, certain criteria may still need to be met.

Browse Our Minnesota Roofing Projects:

Minnesota Roofing Reviews:

"I can’t rave enough about the customer service! I expressed my curiosity of an estimate.  Dylan made the process very explainable and broke it down to me in levels of importance first and what we need to do in the future.  I am looking forward to doing my home improvement w/ a business that understands my needs and is willing to work with me.  Thanks Lindus Construction!"  

Jess H.
Woodville, WI
January 23, 2020

"My house was done (with insulation) this fall what a warmer difference it has made.  Thanks so much!!!!"

Sandy M.
Minneapolis, MN
January 19, 2020

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

"I had a new roof put on, my ceiling insulated, and LeafGuard® gutters installed. The salesperson was great to work with and the crew was amazing! I was kept informed about the process by the crew and the office staff was always available to answer questions. I highly recommend Lindus and will likely have them install new siding."

Tammy D.
St. Paul, MN
May 15, 2019

"Lindus insulated our attic and basement. They came on time, communicated well and didn't leave a mess behind."

Leslie S.
St. Paul, MN
March 15, 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
Complimentary Estimates on LeafGuard® Brand Gutters and GAF Asphalt Shingles We are also offering a complimentary heat map analysis with insulation estimates through July 2022.
Some restrictions may apply. Call for details.