Exterior waterproofing addresses the source directly: excavation, membrane application, and footing drainage designed to keep water away from the wall in the first place, permanently.
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Four commitments that separate a properly trained exterior waterproofing crew from a generalist showing up with a truck and a hope.
Certification covers grading assessment and rubberized membrane application to manufacturer spec, verified on every job.
Local crews understand your region's soil composition and typical frost depth, both of which affect excavation planning significantly.
Quotes break out excavation footage, membrane material, footing drain installation, and backfill separately in writing.
Drainage board over the membrane channels water to the footing drain rather than letting pressure build against the wall.
Each service below is scoped specifically to exterior waterproofing, not a generic waterproofing menu with the name swapped in.
Drainage board over the membrane channels water down to the footing drain instead of pressing against the wall. This is the most thorough exterior fix available and typically carries the longest service life.
A footing drain intercepts groundwater at the base of the foundation and carries it away before it can build pressure against the wall.
Soil sloping toward the foundation sends every rainfall straight at your basement wall, regardless of how good the membrane below is.
Window wells without proper drainage collect and hold water against a vulnerable point in the wall — often the source of a leak that seemed to come from nowhere.
Cracks and cold joints exposed during excavation get treated directly from the outside before the membrane goes over them.
Four steps, start to finish — from your call to a backfilled, regraded foundation wall.
Photos of the affected area, texted ahead, help the technician plan equipment before arriving.
You'll get a text confirmation with an arrival window and any documents needed, like utility locate authorization.
Pricing is itemized by excavation footage and membrane material, in writing before any digging begins.
We document the completed system with photos before backfilling for your records.
Real feedback from Harriman-area customers who called us for exterior waterproofing.
"They found our footing drain had completely collapsed after thirty years — explains why interior fixes never fully worked before."
"Regraded the whole side yard and extended our downspouts as part of the job. Haven't seen water against that wall since."
"Excavation crew was careful with our landscaping and put everything back better than it was before."
"They explained why interior injection alone wasn't going to solve our specific problem before recommending exterior work."
The questions Harriman customers ask us before booking exterior waterproofing service.
Our exterior waterproofing crews cover Harriman and the surrounding Harriman, NY service area, with regional dispatch keeping response times tight regardless of which part of the footprint you're in.
Because exterior work requires excavation crews, coverage is more regional than interior services — worth confirming by phone either way.
Notice: Arrow Tight Waterproofing is a free referral service designed to assist homeowners and businesses in connecting with independent local contractors. All contractors and service technicians are independent and Arrow Tight Waterproofing does not warrant or guarantee any work performed. It is the responsibility of the customer to verify that the hired contractor furnishes the necessary license and insurance required for the work being performed. All calls are routed to independent local service providers.
