No two roofs are created equal! But determining the cost of a roof isn’t as simple as multiplying the cost of shingles by your square footage. Here are five things to consider.

Roof size

To state the obvious, the larger the roof, the higher the cost! Remember that your roof isn’t directly equal to the square footage of living space in your home. The garage, overhangs, porches, and entryways are included in the roof size, too.


The steeper the slope, the more costly your roof. Dormers, gables, overhangs, and any other architectural elements can also drive up the price.

Materials must be cut to fit the shape of slopes, ridges, valleys, and flashings of a roof. To get an idea of your waste cost, add 10-15% of the total roof square footage.


There is a raw cost for shingles, plus underlayment, vents, flashing, and anything else your roof might need. Like anything else, the prices vary depending on the quality of the materials. Sometimes a dumpster is also needed to dispose of your old roof’s materials.

Sometimes, particularly in older homes, ventilation isn’t adequate. New vents may need to be cut, which is a necessary expense.

The best way to determine the cost of your roof is to schedule an inspection with Armour! Inspections are completely free.