If you decide to roof mount your solar panels there are 5 main steps to take.
Roof requirements for solar panels.
The existing roof must be verified to either meet the current prescriptive roof design requirements in chapter 8 or be.
Repair any problems or install a whole new roof if necessary.
Most solar panels are designed to work for 20 to 25 years and the roof will need to last that long as well see references 2.
With a solid wiring electrical plan in place the next step is mounting your solar panels.
A quick slide down a bank of solar panels and off the roof is likely just as deadly as braving the smoke filled path through the house.
Whether you decide to roof mount or ground mount your array the following sections will outline everything you need to build a solid mounting foundation.
The international fire code 605 11 3 2 4 that states panels modules installed shall be located no higher than 3 ft below the ridge to allow for fire department ventilation operations significantly decreases the attractiveness of residential solar pv because it applies to both sides of a peaked roof.
Does your roof have enough space where the solar panels will be placed.
The ideal roof for solar faces south at 180 degrees true orientation or 195 degrees if using a magnetic compass to maximize the amount of sunlight that your panels receive.
An average size for a good space of the roof would be 400 600 square feet.
Usually each solar panel takes about 18 square feet.