5 Reasons Not to Have a New Roof Installed Over an Old Roof
- by Karl
So you require a new roof and are attempting to determine whether to try and conserve some money by having the brand-new roofing system mounted over an existing layer of roof. This strategy is rather usual in numerous locations and also many roofer don’t see any trouble with this method and also have no problem trying to sell homeowners on a lay-over or go-over as this strategy is called. They are wrong.
5 Leading Factors A Lay-Over Or Go-Over Is A Negative Idea When Re-Roofing
1.) Areas that have or had leakages can not always be addressed appropriately
There is a good chance that your old roofing system had some trouble locations consisting of feasible leakage spots, whether you discovered them or not. Without detaching the old roofing system as well as appropriately determining these sorts of trouble spots and identifying where the leak was coming from and taking a trip to it is impossible to inform what areas of your roofing might require some unique focus.
2.) Any type of rotted timber under the existing roof covering will just become worse
There could be areas that have rotted wood hiding under the old roofing. These decayed areas need to be determined and also replaced before a brand-new roof covering is installed. Certainly if your professional roofer is just doing a lay-over roof covering installment after that these decayed areas will remain concealed and also just become worse as the years take place. Also the nails holding down the roof shingles in locations with rotted wood can not correctly do their work and you have a much higher danger of roof shingles blowing off in those areas.
3.) Eaves, rakes and valleys requirement unique therapy
This is a huge one. The eaves, rakes as well as valleys of your residence requirement special attention when your home’s roof covering is being installed. This is especially crucial in cooler climates like Massachusetts, where we are located. In the winter season time the eaves of your residence are under fire by Mother Nature, whether it is through ice dams, snow develop, or simply the constant freezing and also thawing that happens throughout the winter. When a new roofing system is correctly installed the roofing contractor requires to put new aluminum drip-edge around the entire perimeter of your roofing system.
Next they require to use a 3 foot wide area of ice & water barrier around the border in addition to in any valleys on your roofing system. Then they can start to mount the new roof covering. Without detaching the initial roof there is no chance to appropriately set up the brand-new drip-edge or ice & water barrier. On a lay-over sort of roof covering install, the roofer is trusting the existing items on the residence’s roofing system to still be up to par and also have the ability to manage the winter problems. All too often the old products fall short whether it was due to the fact that they have actually outlived their life time, were crappy to start with, or maybe they were never there to begin with (all to commonly the last is the case with ice & water obstacle).
4.) Added roof weight is no good for old rafters
Among the extra apparent troubles with a lay-over re-roof is the included weight of the extra layer of tiles. On many more recent houses this is not an issue, nonetheless numerous older residences have rafters that are taken into consideration undersized by today’s framing criteria. It is not uncommon to see 2 × 6 rafter systems on most of these homes. Now in many scenarios a 2 × 6 rafter is undersized to begin with and also you definitely don’t wish to be adding the weight of a new roofing layer on top of an old roof covering layer to these already undersized rafter systems. With newer roofs utilizing 2 × 10, 2 × 12, engineered trusses, and so on the weight isn’t constantly as much of an issue.
5.) Shorter roofing life span
Many responsible professional roofer agree that a lay-over roofing system will decrease the brand-new roof covering’s life time by about 25%. This truth alone implies that any kind of cash you could have conserved by doing a lay-over, rather than a tear-off as well as new roof set up, was only a short term cost savings. In addition, you now have 2 layers of roof covering that will certainly require to be eliminated the next time your roofing system is done and that will certainly additionally include even more cost to the work
Tear-Off Then Re-Roof Is Always Superior
Well, I just gave you 5 excellent reasons to tear off your old roof and after that install your brand-new roof. Yes it can be cheaper in the short term to do a go-over on your old roof covering, yet, in the long-term it will certainly cost you much more. We never advise this strategy to our clients. We always recommend completely tearing of the old roofing, taking care of any type of underlying problems, then installing a fresh, gorgeous brand-new roofing that will outlast any lay-over roof along with much better safeguard our clients’ houses.
Roofing Wellington, FL is our specialty. We’re a roofer with over 30 years of experience and we know what it takes to make your home look its best. Whether you need an emergency repair or want to replace your entire roof, EW MacDowell Inc can help.
EW MacDowell Inc.
15320 Emmelman Rd,
Wellington, FL 33414
So you require a new roof and are attempting to determine whether to try and conserve some money by having the brand-new roofing system mounted over an existing layer of roof. This strategy is rather usual in numerous locations and also many roofer don’t see any trouble with this method and also have no problem…