Benefits of Metal Roofing Over Shingles
Installing metal roofing over existing shingles offers a cost-effective solution to the constant expense and hassle of shingle replacement. Metal roofs last 50+ years, require minimal maintenance, and enhance a building's curb appeal with various styles and colors. Moreover, they are eco-friendly, made from recycled material, and 100% recyclable at the end of their lifespan.
Environmental-Friendly Roofing Choice
Metal roofing is an environmentally friendly option, as it is recyclable and eliminates the need for shingle disposal fees. Unlike shingles, metal panels can be installed directly over existing shingles, saving both money and the environment.
Metal Roofing Installation Methods
a. Metal Panel Attachment with Furring Strips
Use wood purlins or sub-girts as furring strips over existing shingles. These strips provide a foundation for metal roof panels, making the installation environmentally friendly. Ensure a barrier between copper-treated wood and metal panels to prevent corrosion.
b. Direct Metal Panel Attachment to Shingles
Attach metal panels directly through shingles into the wood deck below, saving on costs. However, note that steel can reflect deck and shingle inconsistencies. While economical, this method may reduce energy savings and require a barrier to protect shingles from wearing through metal panels.
c. Shingle Recover Systems
Consider patented systems like the 138T Shingle Recover System, eliminating the need for furring strips. This system provides Above Sheathing Ventilation (ASV) for energy efficiency and symmetrical panels for easy installation and replacement. Unlike asymmetrical systems, symmetrical panels allow hassle-free repairs without removing undamaged panels.