DOOLITTLE AND CHIP SEALING

PERFECTING THE ART OF COST-EFFECTIVE PREVENTATIVE MAINTENANCE

75 Years of Chip Seal Expertise

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.

Specialized Equipment

Our specialized equipment consists of liquid asphalt distributors (tack trucks) and aggregate chip spreaders, all of which have a computer controlled application rate to insure that the proper quantity is applied to the road. Our crew specializes in chip seals, and this focus shows with the quality of the work.

Fog seal (or black seal), after the chip seal, has increased the acceptance of chip seals. There is better rock retention, less sweeping, and contrast is sharper. Most people prefer a black road. It takes away some of the coarseness, slightly smoothing the road.

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