There are some critical things to keep in mind before you install metal roofing over shingles. Not following these steps will cause severe roof damage, waste valuable resources, and lead to structural problems. To avoid these mistakes, you should follow these easy-to-follow instructions. These tips will help you install metal roofing over shingles safely. Once you have installed the new metal roof, you can enjoy its beautiful look. You can also use it to cover the eaves of your home.
First of all, you have to know that metal roofing over shingles is possible. This is only possible with proper preparation and approval by your local building department. While some building officials will only allow you to install metal roofing over one layer of shingles, most will not object. However, before you install the new roof, you should know that the two options are different. For example, if you want to install a metal roof over shingles that are not damaged by hail, you should use the first method.
After you have installed the new metal roof, you have to remove the old shingles. This will allow you to examine the decking of your roof and see if it is rotten or infected by wood roots. Ensure that the surface is level, as this can make metal roofing unsuitable. This will also make it impossible for it to adhere properly. The final step in the process is to remove the old shingles.
There are two main steps in installing metal roofing over shingles. The first one involves applying an approved underlayment over the old shingles. This option requires a higher price but provides a flat surface for the new metal roof. The second method requires installing a 1×4 purlin over the shingles. This option, however, is more expensive, but the quality of the roof will be much higher.
When installing metal roofing over shingles, you should be sure to use an underlayment before installing the new metal roof. It will protect the shingles and prevent them from rubbing against the metal. Aside from this, the new underlayment must also be properly secured to prevent the metal roofing from moving around. The next step is to install the purlins. These will protect the shingles from the added stresses of the installation process.
Before installing the metal roofing over shingles, you should make sure that the existing shingles are in good condition. You should take note of the condition of the existing shingles and check for signs of wood roots. If there is any sign of these, you will need to rebuild the entire roofing system. Otherwise, the metal roof will not fit properly and will create aesthetic and functional issues. After removing the old shingle layer, you can carefully install the new one.