Exterior and below-grade waterproofing deals with the parts of a house you can't see once the backfill goes back in: foundation walls, footings, and the soil around them. Instead of managing water after it gets inside (the job of interior drain tile and sump systems), this work stops it before it reaches the concrete. That typically means excavating down to the footing, applying a rubberized or asphalt-based membrane to the foundation wall, installing a drainage board or dimple mat to move water away from the wall, and tying in exterior footing drains that daylight or connect to a storm system. Grading and downspout extensions often get corrected as part of the same job, since poor surface drainage undoes even a good membrane.
We've listed 5 contractors in Edgerton that do this kind of work, and they're not interchangeable. Ask each one how they handle excavation depth verification, what membrane and drainage board they spec, whether they warranty the work in writing, and how they deal with utility lines, landscaping, and hardscape near the foundation. A contractor who explains their process in plain terms and shows you photos from past digs is usually more trustworthy than one who just quotes a price over the phone.
Our scoring weighs licensing and insurance, the specificity of warranties offered, review consistency over time, and how well each company communicates scope before digging starts. For a side-by-side comparison of all 5 based on that scoring, see our ranked guide to waterproofing contractors in Edgerton. If you want to see exactly how we weigh and verify these factors, our methodology page breaks down the process.
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5 businesses, scored on recent reviews. The order weighs each business's overall score by how much of its reviewed work is exterior & below-grade waterproofing, so a lower-scored specialist can rank above a higher-scored generalist.
Hail-damaged homes drive most work here, and the team earns consistent praise for coordinating insurance, managing timelines, and delivering finished roofs and gutters quickly. One significant negative review details screaming during customer service calls and defective soffit work that required hundreds of dollars in correction; the owner personally checks projects, yet communication breaks down sharply once jobs are underway.
Crew earns praise for effort and attentiveness. Safety and site conduct draw concern from some reviewers, with reports of parking violations and lapses in safety protocols.
Two recent five-star reviews praise the team's quality and help navigating insurance claims, while an older one-star review cites a lack of follow-through. Evidence is limited to three reviews.
Tellefson Concrete has earned strong marks for concrete quality and fair pricing when work stays on track, but a sizable share of recent reviews cite missed callbacks, stalled projects, and drainage problems post-completion. Experience varies sharply: satisfied customers praise the owner's care and enthusiasm, while others report months of unresponsiveness and failed repairs.
Experience here varies widely. Some reviewers report competitive pricing and a capable crew, while others describe unresponsive communication and workplace incidents that went unresolved.
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Call a Waterproofing ProviderLast updated 2026-09-14
