Serving Dupage, Cook and Lake Counties, Mount Prospect, Schaumburg, Wood Dale

Case Studies

Pro Home 1 Case Studies: Why Pro home 1 advised this Homeowner not overlay a new roof over existing old roof?

Friday, December 15th, 2017 by Peter Pawelko


Pro Home 1 was contacted by a homeowner to get a estimate on overlaying shingles over their existing roof.  We advised the homeowner what happens when another layer of shingles are added to your existing roof vs. removing all layers and installing a new water and ice shield with brand new shingles.  Most Vilages will allow 2 layers on your home and some homeowners will consider this option of overlaying shingles because of the lower cost in which they believe is the most cost effective way.  The savings on cost could cost you more in the long run.  When adding more weight to your roof you also have to know you are adding more weight to your foundation. With the extra weight of adding another layer your home could settle more often causing interior cracking and possible foundation issues.  Most people believe that their foundations are concrete so they are built to withstand this extra weight of the roof, but the ground does shift.  In re-roofing over your existing roof the installers will not be able to install the proper ice and water sheild and the homeowner could be faced with paying a bit extra for the heavier weight shingles to hide higher spots on the roof and dips in the roof. The other issue with overlaying shingles on a existing roof is their is no manufacturers warranty involved.  


The solution we recommended to this homeowner would be to remove the old layers and install a new roofing system with ice and water sheild.  Removing all additional layers will take the added weight stress off of your home allowing for any potential issues from the extra weight  to be reduced. You will have a more efficent roofing system that will last for years and years to come. With your new roof you will also have the manufactuers warranty and this is a added protection for peace of mind.  Now your roof will have the proper ventialtion it needs and will function the way it is meant to function.  The homeowenr was able to actually feel the difference when the new roof was installed by now having proper ventilation because in selecting their new roof they decided to install a Owen Corning Hip & Ridge vent with their new Owens Corning Duration shingles.

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Pro Home 1
655 N Central Ave Suite F
Wood Dale, IL 60191