Are you looking for a new roof? There are many different options available in the roofing industry. They vary from multiple variations of asphalt shingle types to variations of steel panel roofs. But is it possible to install a metal roof over an existing shingle roof?
The simple answer is yes; however, installing a metal roof over an existing shingle-based roof can be pretty challenging. To install a metal roof over an asphalt shingle roof, one must consider the following:
1) the type of metal used (galvanized steel vs. stainless steel),
2) the type of insulation used (foam board vs. fiberglass batts),
3) the weight of the new roof system
4) the pitch of the roof
5) the slope of the roof
6) the amount of snow load on the roof
7) the age of the roof covering
8) the condition of the roof deck
9) the condition of the fascia boards
10) the condition of the soffit
Before installing a metal roof over your home, you’ll want to ensure that the roof plywood or planks are secure and robust enough to support the weight of the new roof. You’ll also want to check that the roof decking doesn’t show signs of damage where it was penetrated by rainwater. These two issues can quickly be addressed through careful roof inspection before installation.
Inspecting roof decks and framing from the attic requires a lot of caution. You might get hurt if you make a mistake. Before doing anything else, check out the roof decking and framing. Look for cracks, splits, and mold growth. Also, take note of how much rainwater runs off the roof. These are essential steps before beginning work on the roof.
New 1×4 wooden strips should be installed vertically and horizontally along the entire length of the roof planks every 24 inches starting from the bottom edge and ending at the peak. Wood screws should be used to secure the new 1×4 boards. Once this is completed, it is time to apply the roofing panels. Make sure that all roof penetrations get flashed properly with flashing boots so they can work with the metal roofing material selected for your project.
Metal roofs require special attention during installation. If you choose a metal roofing system, use quality materials from reputable manufacturers.
A straightforward way to prevent the face screwed roofing materials is to utilize a concealed fastener metal panel. Such panels are referred to as standing metal seams. It is strongly suggested when selecting a metal roof to consider longevity. Simply stated, a concealed fastener panel is likely to endure the whole lifetime of your roof with little possibility of leaks except for failing roof penetrations over the time.