Similar to painting your house so your siding is not exposed to water and Ultra-violet damage, it is important to protect your Asphalt in the same way. Asphalt becomes brittle over time due to the off gassing of the lighter portions of the oils. With time, exposure to sunlight will decay the surface oils.
To protect your asphalt from this damage, a commercial grade Asphalt Sealer should be applied every 3-6 years.
A new asphalt driveway will range in cost from about $2.00- $6.00 per square foot. If a driveway decays too far, you may have to remove the asphalt before repaving. This will add an additional $1.00 - $3.00 per square foot.
Protecting your asphalt with sealcoating will range in cost from about $0.18 - $0.30 per square foot for an average size driveway.
Keep you Asphalt Clean!
Don't allow oil, gas, diesel and transmission fluids to drip from your car as it will dissolve the asphalt oils.
Don't allow moss to grow or dirt and gravel to remain on the surface as it will scrub the fine aggregate and oil form the asphalt.
Protect your asphalt from this damage by applying Asphalt Sealer.
Cracks in your asphalt allow water to penetrate and destroy the subgrade. Water can liquefy the supporting structure or freezing and lifting the asphalt.
Whether a crack has been created by tree roots or the asphalt becomes brittle with age, it needs to be sealed with a rubberized hot-poured crack filler.