Exterior Basement Waterproofing in Rochester, NY
Exterior basement waterproofing stops water before it ever reaches your foundation — the most thorough protection available. We excavate around your foundation, apply a waterproof membrane directly to the walls, install exterior drainage, and backfill properly.
Get a Free EstimateIt’s a bigger project than interior waterproofing, but for homes with serious water issues, deteriorating foundations, or new construction, it’s the gold standard.
How Exterior Waterproofing Works
- Excavation — We dig down to the footing around the affected walls, protecting your landscaping as much as possible.
- Wall prep — Foundation walls are cleaned and any cracks are repaired.
- Waterproof membrane — A rubberized asphalt or polymer membrane is applied to the exterior walls — a true waterproof barrier, not just damp-proofing paint.
- Drainage board + drain tile — A drainage mat protects the membrane while exterior drain tile carries water to daylight or a sump.
- Backfill — We backfill with proper grading so surface water flows away from your home.
When Exterior Waterproofing Is the Right Choice
- Water is entering through multiple cracks or deteriorating mortar joints
- Your foundation is stone or old block that’s breaking down
- You’re already excavating for an addition or major landscaping
- New construction — waterproof now, never worry later
- Interior systems alone haven’t solved the problem
Exterior vs. Interior Waterproofing
Honest answer: for most Rochester homes, interior drainage solves the problem at half the cost. We recommend exterior waterproofing only when the situation genuinely calls for it — crumbling walls, structural concerns, or new builds. Any contractor who pushes exterior work for a simple seepage problem is upselling you. We’ll tell you straight which one you need.
Built for Rochester’s Soil and Seasons
Rochester’s clay-heavy soil expands when wet and puts enormous pressure on foundation walls — engineers call it hydrostatic pressure, and it’s the #1 cause of wall cracks here. Our exterior systems include proper drainage aggregate (not just native clay thrown back in the hole), which is the detail most contractors skip and the reason cheap exterior jobs fail within a few years. We do exterior work spring through fall when the ground is workable.