651-212-4221
Feb 18, 2013
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Can I Install a New Roof Over My Old One?

Installing a new roof is a sizable investment and most homeowners want to ensure that they’re being wise with their money.  As a cost-saving measure, some may look to eliminate the cost of the tear-off of the old roof by simply roofing the new roof over the old one.  It may seem like a good idea to put new shingles over the old ones, thinking that it may offer additional protection.  We believe this mentality to be a penny-wise and dollar foolish for the following reasons:

Legality

Most homes in the Midwest are classified as “moderate hail zones”.  When a home receives this classification, it is illegal to install a new asphalt roof over an existing one.  Check your local ordinances to see whether this is even a possibility before moving forward with the project.

Roof Deck Inspection

A roof deck is an underlayment that shingles are laid on top of.  By adding shingles on top of the old roof, there is no opportunity to inspect the roof deck to ensure that the current wood is not wearing out.  Worn out portions of the roof deck can cause leaking.  Stripping the roof down to the roof deck, also give the nails being used in the new roof a better chance to hold.Torn-off roof

Weight

Asphalt shingles are heavy and adding a second layer of them to your roof may compromise your home’s walls and roof structure.  Even if your area does permit shingles to be placed on your roof in multiple layers, eventually you will incur the cost of removing them because your roof can only support so much weight before its integrity is compromised.

roofing

Sealing Issues

It’s improbable that your current shingles will line up with the existing ones.  This will prevent the current shingles from sealing properly and as a result, they may come off during high winds easier than they normally would.

Manufacturer Warranty

Roofing manufacturers have warranties in place to protect consumers from the cost of replacing a roof should their product malfunction.  Manufacturer warranties oftentimes will not cover new shingles being layered on top of old ones.  The reasoning being that it is unlikely that the new shingles will be able to lay flat.  If the shingles are not laid on a flat surface, they won’t conform to each other the way they are supposed to.  Winds that the shingles should be able to stand up to may cause them to loosen.  This leaves the homeowner with repair bills or the cost of replacing the roof sooner than they should have had to.

 

Reviews

We Strive for 100% Customer Satisfaction

Delivering exceptional service is our No. 1 priority. Read these happy reviews from homeowners who were blown away by their home improvement experience with Lindus Construction.

"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

"I've used Lindus Construction many times: roof, windows and recently an egress window. I would never hire anyone else. I know I can trust their work. The best."

Kathie R.
Eden Prairie, MN
February 14, 2022

"Deck replacement with composite materials. Staff was friendly and knowledgeable, on time and communication was good. The deck looks great!"

Marrielle & Fred O.
Shoreview, MN
November 22, 2021

"Kept me in touch through out the whole process. Very happy with their work."

Shelly P.
Minnetonka, MN
November 11, 2021

"They replaced our windows from 1951!"

Becky S.
St. Croix Falls, WI
November 11, 2021

"Best product. Great people. They really know their business. You won't be disappointed! Thank you!"

Howard F.
Brooklyn Center
October 22, 2021

Lindus was very professional. Lindus arrived on time and finished in a timely manner. Overall it was a job well done."

Christopher O.
North St. Paul, MN
October 22, 2021

"Love the product! Everyone at Lindus was a pleasure to work with!"

Lynnae Z.
Circle Pines, MN
October 21, 2021

"Installed gutters. They had innovative solutions to the problems I was having with my existing gutters. Professional crew came, work hard, ask for feedback. Top-notch service. I always recommend."

Polly P.
Columbia Heights, MN
October 21, 2021

"Great company!!!!"

Jerry T.
Shoreview, MN
October 21, 2021

"Work was great. Crew did great work, fast, clean up was very good. Could not believe how fast that they did the job. When beyond what I expected. Very good work, great crew. Thank you."

Charles G.
Roberts, WI
October 14, 2021
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.
Some restrictions may apply. Call for details.

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