Best waterproofing companies in Cortland
Six Cortland waterproofing and related contractors, ordered by composite score from reviews, recency and profile completeness (see our methodology). Scores last updated 2026-10-08, and several listings have few reviews, so read confidence notes.
Picks are ranked by relevance to waterproofing company.
At a glance
| Business | Rating | From | Best for |
|---|---|---|---|
| Kovack Excavating chimney & Chimney cleaning LIMITED | 5 (5) | — | Chimney and mold jobs |
| Valley Concrete Restoration | 4.9 (193) | — | Reliable all-round service |
| Z-Tech Builders Excavators Inc | 3.8 (12) | — | Basement work with septic needs |
| Horvat Concrete Inc | 5 (12) | — | Clean, communicative crews |
| Jack Luscher Excavating | 5 (1) | — | Further checking needed |
| Concrete Construction Mach Co | 5 (2) | — | Phone advice and quotes |
Kovack Excavating chimney & Chimney cleaning LIMITED
5 (5 reviews)
Five Google reviews, all five stars, with recent visits covering a gas line, chimney cleaning and mold work. Reviewers say the team explains the work in plain terms. Confidence is low because the review count is small.
- Reviewers mention clear explanations
- Questions answered during visits
Watch out: With only five reviews, the score is an early read; ask about waterproofing scope directly.
5 Google reviews
Services: exterior waterproofing drainage, basement waterproofing, crawl space waterproofing
Valley Concrete Restoration
4.9 (193 reviews)
The strongest score here, backed by 4.9 stars across 193 reviews and recent activity. Reviewers describe polite, on-time crews who explain options before work starts, and a quick return to fix a small issue after installation.
- On-time arrivals and prompt completion
- Options explained before work begins
- Clean worksite after the job
- Follow-up questions answered by text
Google-verified193 Google reviews
Services: foundation crack repair, basement waterproofing
Z-Tech Builders Excavators Inc
3.8 (12 reviews)
A 3.8 rating from 12 reviews, with mixed sentiment. Reviewers who hired the team for basement waterproofing and septic work mention a friendly owner, fair estimates and tidy work. Confidence is low given the small sample.
- Owner described as friendly and easy to work with
- Estimates reviewers call accurate
- Careful, tidy basement waterproofing
- Basement wall repair with drain replacement
Watch out: Some older reviews mention slow call-backs on quotes, so plan to follow up.
Google-verified12 Google reviewsover 30 years
Services: basement waterproofing, exterior waterproofing drainage
Horvat Concrete Inc
5 (12 reviews)
A 5.0 rating from 12 reviews. Reviewers describe a professional crew and an owner who stays involved. Most reviews are several years old, so confidence is low and recent detail is limited.
- Professional, courteous crew
- Owner communicates with clients
- Job sites left clean, debris removed
- Willing to adjust plans mid-project
Watch out: The newest review is about a year old, so confirm current availability.
Google-verified12 Google reviews
Services: basement waterproofing, exterior waterproofing drainage
Jack Luscher Excavating
5 (1 reviews)
A single five-star Google review and no recent reviews, so there is not enough to form a reliable read. It is listed for completeness, and confidence is low.
- 5.0 rating from its one review
- Listed as an excavating contractor in Cortland
Watch out: Very little review history, so ask for references and a written quote.
Google-verified1 Google reviews
Services: foundation crack repair, basement waterproofing, exterior waterproofing drainage
Concrete Construction Mach Co
5 (2 reviews)
Two five-star reviews. One reviewer has dealt with the company for 16 years and calls the staff helpful and knowledgeable. The other describes a family-owned firm that invites calls with questions. Confidence is low because of the tiny sample.
- Knowledgeable staff reached by phone
- Long customer relationships noted
Watch out: Reviews are few and not recent, so check current services before booking.
2 Google reviews
Services: basement waterproofing