For the unsure, the idea of installing metal roofing over existing asphalt shingles may sound like little more than a convenient shortcut. There are a few notable benefits to this common method of installation, and it can save a lot of time and money in the process. After all, the money you would normally spend on removing and disposing of an old asphalt shingle roof could be used to purchase even better metal roofing materials.

If you're a do-it-yourselfer, or just a concerned homeowner looking to learn more about your metal roofing contractor's methods, here are a few of the advantages this approach provides: 

• Added Layer of Defense: One way of getting this job done involves running a new underlayment to completely cover the existing roof, and then placing the metal roof on top of that. This doesn't just provide a convenient buffer between layers; it acts as a second line of defense if water manages to make its way under the metal layer.
• Boosted Energy Efficiency: Installing a metal roof over asphalt shingles also helps increase energy efficiency. This is particularly good news for the R-Value, or thermal resistance, of your home. The higher this capacity is, the more effective your insulating power will be.
• Decrease in Unnecessary Waste: As efficiency goes up, waste goes down. Letting that old roof stay in place will keep you from needing to fill up nearby landfills with old asphalt shingle materials. It's hard to argue with the combination of saving money and being considerate to the environment. 

As long as there are no signs of leaks or existing weight issues, placing a new metal roof over shingles is a viable and cost-effective option. Every roof should be evaluated on an individual basis, of course, so if you have any doubts don't hesitate to consult with a professional roofing contractor.

When professionals and DIYers alike are on the hunt for top-quality metal roofing supplies, they choose the industry leaders at Dixieland Metals of Alabama. Located in Dothan, AL, and serving Alabama, Florida, Georgia, and Mississippi, they have everything necessary for projects of all sizes. Call them at (334) 678-0038 today, and visit their website for more information about their metal roofing supplies.