Established in 1944, Doolittle specializes in bituminous surface treatments (BST or chip seal) and double bituminous surface treatments (DBST). Focusing on Quality, we have become the contractor of choice for many government agencies and private associations in the Northwest.
Asphalt chip seals are the primary road maintenance tool of almost every county in the state, as well as for the Washington State Department of Transportation (WSDOT) statewide.
A chip seal not only seals and rejuvenates the surface, but also gives better skid resistance than an overlay. If the roads are sealed on a regular basis (7-year rotation), very little additional maintenance will ever be required. An ongoing preventive maintenance program using this method of paving is very cost effective when compared to an overlay program.