When water reaches your foundation from the outside, through poor grading, a failed membrane, or saturated soil, the fix belongs outside too, not just masked from the inside.
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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.
Crews are trained in excavation depth, membrane application, and footing drain installation specific to exterior systems.
Initial exterior assessments, requiring a full perimeter walk, are typically scheduled within a few days across our service area.
Pricing accounts for landscaping restoration where excavation disturbs existing beds or hardscape.
Drainage board over the membrane channels water to the footing drain rather than letting pressure build against the wall.
We don't run a one-size-fits-all playbook — every exterior waterproofing job starts from these core service components, adapted to what your property actually needs.
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.
Here's what happens between your call and a completed exterior fix.
Describe what you're seeing from outside — pooling water, visible staining on the wall, saturated soil — and dispatch routes a crew equipped for exterior assessment.
Technicians walk the full property perimeter before recommending excavation, checking grading and downspout placement.
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.
What Alton, IL customers are saying after their exterior waterproofing service.
"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."
High-intent questions we hear most often about exterior waterproofing in Alton, IL.
Our exterior waterproofing crews cover Alton and the surrounding Alton, IL 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.
