Metal Roof Installation Tips
Metal roof installation is a project you can undertake yourself if you’re properly prepared. The high durability of metal roofs has made them widely popular over the years. Most metal roofs can last in good shape for 40 years and upwards with minimal maintenance. Metal roofs are also some of the easier types of roofing to install. Below are some tips to help you install your metal roof successfully.
You may want to remove your old roofing material before you install a new metal roof. This is a good idea especially if the previous roofing has been in place for several years and has clear signs of damage. However, in some cases you may wish to install metal roofing over the old roof. This saves you the time and effort that would have been spent on removing the previous roof. Installation over an existing roof, however, requires more technical skill and, in some cases, is best left to a professional to undertake. Some of the tools that can help you remove the old roofing material include a nail puller, crowbar, hammer and roofing shovel. Begin at the roof peak and remove the roofing as you steadily work your way towards the bottom. Once all the roofing material is removed, carefully inspect the tar paper underneath for damages. If you spot any rips or other damage, arrange to have the tar paper replaced so that your home is well weatherproofed.
The right tools are vital in the successful installation of metal roofing. Basic tools include a measuring tape, chalk line, caulk gun, metal snips, screw gun and hammer. You can rent electric metal shears, a circular saw, or other mechanical cutting tools from a hardware or home improvement store.
It is vital that you install a synthetic underlayment onto the roof before you attach the metal roofing. This helps to prevent water infiltration. However, if you intend to install metal roofing over shingles, you need not use underlayment. Staple the underlayment into place, and allow it to overhang the roof edge by 2 to 4 inches to guard against moisture. Begin at the eaves and work your way across the roof. Once you complete one row, install subsequent rows until you reach the roof peak. Allow a 6 inch overlap on each row of underlayment.
Install metal edging around the perimeter of the roof before you install the roofing panels. This helps to weatherproof your home. Secure the edging with ¼ inch screws at equal intervals apart.
Placement of Panels
Begin installation at the bottom of the roof along the eaves, and steadily work your way upwards. Place the panels in one row across the roof. The first row of metal panels should overhang the roof by about 6 inches to prevent water infiltration. Overlap each subsequent row by 2 to 4 inches for a watertight seal. For V-crimp roofing, the crimps should lie on each other. For R-panel roofing, the lip of the panel above should overlap the ridge of the panel below.