A long lasting roof is the desire of every homeowner. There are a few factors that affect roof life. By knowing what they are, you can better choose a roofing material to fit your climate and needs.

1. Material Lifespan

The main thing that will dictate the lifespan of your roof, after the craftmanship of the roof installers, is the expected lifespan of the roofing materials. If you have documentation on your roof, then you likely have access to the manufacturer's warranty and information that will tell you the expected lifespan of your roofing materials. In general, metal and tile can last a lifetime with maintenance, while most asphalt shingle products are only expected to last a couple of decades. 

2. Storm Exposure

The frequency, type, and intensity of storms in your area can impact the potential lifespan of a roof. A roof's lifespan won't be drastically affected in an area with periodic rain storms but minimal wind, hail, or ice. Frequent heavy snow loads or hail exposure can remove years from a roof's lifespan thanks to shingle compression and damages. Areas that are prone to high winds may also have shorter roof life, particularly for asphalt shingles. 

3. Rooftop Penetrations

Roofs with a lot of penetrations from vent stacks, chimneys, skylights, satellite dishes are more likely to experience leaks. Each penetration or rooftop mount is a place where leaks can occur, particularly since flashing around such penetrations often deteriorates before the surrounding shingles. You can help counteract the effect of many penetrations by having annual roof inspections and re-sealing the penetrations before flashing around them fails. 

4. Vent Availability

Poor venting has destroyed many roofs. Hot, moist air in a home rises and becomes trapped in the attic unless it is routed out with help from roof soffit, gable, and ridge vents. If there is insufficient venting, heat and moisture collects on the underside of the roof where it can lead to moisture rot from below or aid in the formation of ice dams in winter. Having your vents assessed and additional ones put in when needed can alleviate this concern.

5. Eave Condition

Your roof is only as good as the eaves. If your have sagging gutters, then moisture is getting trapped at the eaves where it can work its way underneath the shingles and cause damage. Rotting wooden eaves also indicate that rot is likely going to progress to the cladding beneath your shingles. Maintain your eaves and gutters and your roof will also likely last longer. 

Contact a residential roofer if you require more assistance.