Doesn t provide the flattest surface for the metal roofing to be installed over each course of shingles is about a 1 8 higher than the course just below it.
How to lay metal roofing.
Secure the gutters using a hammer and 1 2 inch roofing nails.
3 install 1 4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1 4 purlins over the shingle roof.
Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.
Lastly use heavy gloves when handling sheets of metal roofing material as they can be sharp and lead to cuts.
In many cases it makes sense to remove an old or dilapidated roof and install a metal roof that is better able to withstand the elements.
Metal roofing can also be significantly more expensive than pvc.
One downside is that the metal sheets have a susceptibility to denting both in installation and during hailstorms.
This helps to prevent water infiltration.
If you want to install steel over asphalt your best choice for installing metal roofing is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel.
Measure the length of the roof edge with a tape measure.
You will most likely have to order the roofing metal in the amount and color specific to your house.
Install gutters in valleys as needed.
Metal roofing resists rot is not susceptible to insect damage and is non combustible a boon in fire prone areas.
Cut the gutters to fit using metal snips.
Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.
How to lap metal roofing a basic rule of thumb for installing metal roofing is that the piece of roofing higher up on the slope should always overlap the one below it.
The good news is that there are many different solutions in terms of installing metal roofing panels including tin aluminum and steel.