If you are currently considering a new metal roof but you are shying away from roofing expenses, do not worry about the cost. While you certainly can replace your entire roof that you have now with a strictly metal one, it is actually ill-advised, and not because of any fault of the metal roofing. Keeping the old shingles on is actually better for your metal roof installation, and here is why.
The Insulation Layer IS Your Old Shingles and Underlay
If you were to rip off all the old shingles, you would have to take the old roof underlay off with them. This exposes your entire roof to the elements while you work and wastes energy because heat or cooled air will escape straight up through the uninsulated and bare roof. As long as you have no water damage or areas that are in serious need of repair, your current roof underlay and the shingles act as a double insulating layer underneath, protecting your home while you install the metal roof over the top.
The Metal Panels Are Doubly Secured to the Roof
When you leave the old roofing behind and install the metal roof panels over the top, you have to screw the panels into something. On a bare roof with a thin, insulating roof underlay, there is not much to secure the panels to. On the other hand, there is more thickness with the old shingles to drive the panel screws through, and the old shingles are already secure to your roof, creating a doubly secured metal roof.
The Old Roofing Protects Your Home at the Metal Roof's Seams
Metal roofing requires a sealing caulk at the seams and/or flashing to keep precipitation from sneaking in under the panels. High winds can damage the flashing, while weather conditions eventually wear down the sealing caulk. Even if you use both, there is still a chance that they could fail. Having the old roofing material underneath your new metal roof protects your home in the event that the caulk and flashing fail, exposing small sections of your roof to rain, snow and ice.
You Can Install Metal Roofing on Your Own
Not surprisingly, if you leave the old roof intact and install the new metal roof over the top of the old one, you can install it by yourself. As long as you have taken accurate measurements for the panels you will need and you have all of the flashing, gutters, caulk and screws necessary to the installation, you probably will not need a roofer. If you have an exceptionally high or very large roof, you may want to reconsider a DIY metal roof and hire a roofing contractor, but you can still request that the metal roof be installed over your old shingle roof.
For more information, contact Freedom Roofing or a similar company.Share