RatSlab Crawl Space Encapsulation & Basement Waterproofing Services

RatSlab Crawl Space Encapsulation & Basement Waterproofing Services operates as a general contractor serving Seattle and surrounding communities in the Pacific Northwest. The business holds a 4.7-star rating derived from 15 customer reviews, reflecting consistently positive experiences with crawl space encapsulation, waterproofing, and pest exclusion services. Customers in Seattle, rural eastern Washington, and communities beyond the metro area have engaged RatSlab for projects ranging from pre-sale home preparation to full-scale foundation remediation.

What distinguishes this contractor is the proprietary Ratslab installation method, a concrete encapsulation system designed to seal crawl spaces against both moisture and rodent intrusion. The business offers free radon gas testing with lab results, a health-focused add-on that distinguishes their service package from standard encapsulation providers. Their service menu spans crawl space cleaning, rat deterrent systems, mold remediation, sump pump installation, foundation venting, and insulation work.

Customer reviews highlight specific technicians Ray, Ramos, and Raymond by name. One reviewer described Ray and his crew handling a severe pack rat and ground squirrel infestation beneath a rural eastern Washington foundation, including disinfection and concrete sealing. Another case involved a 1943 bungalow with ongoing rodent tunneling problems where the team removed and replaced insulation, secured entry points, and installed a four-inch concrete slab with follow-up inspections. Reviewers consistently mention responsiveness, fair pricing, and completed work that resolved long-standing crawl space issues.