Edmonds Asphalt Maintenance

What causes asphalt pavement to fail?

*Assuming that the initial asphalt pavement was designed and constructed properly, the primary cause of failure is the penetration of water into the asphalt base.

*This process begins with the oxidation of the pavement surface which causes the asphalt to dry and become brittle, this leads to the erosion of the top layer of fine particles and the appearance of larger stone and small crack on the surface.

*If left untreated these cracks grow over time and eventually allow water to penetrate to the base of the pavement.

*When water enters the base of the pavement the base material moves and settles leading to further cracking and an "alligator appearance"

*When the pavement reaches this stage the only option is removal and replacement of the old asphalt.

How does Sealcoating Help?

Slurry Seal seals the asphalt pavement, preventing the oxidation and erosion of the top layer of asphalt.

*Slurry seal seals the small cracks that can turn into large cracks and prevents water from seeping down to the base material.

 *Slurry seal provides an attractive black surface thatis ideal for painting lines andother markings.

*Slurry seal helps protect the asphalt from the sun as wel;las theharmful effects of chemical spills such as oil or gasoline.

When should Sealcoating be done?

*Generally it is recommended that new asphalt pavement be allowed to cure for a few months prior to sealing.

*After a surface has been sealed it should be re-sealed every 2-3 years or as necessity dictates.