Nampa's downtown blocks are full of early 1900s brick homes with block or stone basements, while the newer subdivisions out toward 83687 sit mostly on slab. That split matters when water shows up.
If you own one of those older homes near the Nampa Train Depot or a 1990s build off Garrity Boulevard, we've likely already worked on your street. Boise Waterproofing handles basement waterproofing, foundation crack repair, and below-grade drainage across Nampa and the surrounding Boise area. We know how the water table rises with the irrigation season and how spring snowmelt finds every weak seam in a block wall.
Waterproofing Us in Nampa (83687)
Nampa sits on alluvial sand, gravel, and silt, with cemented caliche layers that trap water and push it sideways instead of letting it drain down. Downtown's older brick homes often have block basements with mortar joints that have been weeping for decades, and the outer subdivisions were graded fast, so lot drainage can send a neighbor's runoff straight to your foundation. When the canals charge up each spring, hydrostatic pressure builds under footings and finds cracks, tie holes, and the seam where the wall meets the floor. We see efflorescence on block walls all over the older parts of town, and that white powder is a sign moisture is moving through the masonry, not just sitting on it.
Our team has worked below grade in Nampa for years, from the streets around Lakeview Park to the newer builds near the Nampa Gateway Center. We repair foundation cracks with epoxy or polyurethane injection, install interior drain tile and sump systems where exterior excavation is impractical, and use carbon fiber straps or wall anchors when a block wall is bowing. We also handle exterior waterproofing with dimple board and membrane when digging is the right call, plus window well drainage and egress window installation. We're fully insured with general liability and workers' compensation.
Our services in Nampa
- Basement Waterproofing in Nampa · Complete basement waterproofing for Boise homes…
- Interior Drain Tile System in Nampa · Interior perimeter drain tile installed beneath the slab edge…
- Exterior Basement Waterproofing in Nampa · Exterior excavation down to the footing with membrane or dimple-board…
- Foundation Waterproofing in Nampa · Waterproofing for brick, block, early poured and old stone foundations…
- Foundation Crack Repair in Nampa · Epoxy and polyurethane injection for non-structural foundation cracks…
- Sump Pump Installation & Replacement in Nampa · New sump pits, pump replacement and discharge line correction…
- Bowing Wall Repair in Nampa · Carbon fiber straps, steel I-beams or wall anchors to stop and stabilize a…
- French Drain Installation in Nampa · Exterior drains installed along the foundation wall that intercept groundwater…
- Drain Tile Repair & Replacement in Nampa · Repair of collapsed, clogged or root-bound footing drains…
- Vapor Barrier Installation in Nampa · Heavy-duty vapor barrier sheets installed across basement walls and slab to…
- Basement Wall Sealing in Nampa · Surface preparation, efflorescence removal and penetrating or membrane sealers…
- Battery Backup Sump Pumps in Nampa · Battery backup systems that keep pumping when a winter storm or summer outage…
- Free Basement Inspection in Nampa · Complete basement and foundation moisture inspection: walls, floor, cracks…
- Basement Mold Remediation in Nampa · Mold removal paired with the moisture fix that prevents its return…
- Window Well Drainage & Repair in Nampa · Window well drains, liners and covers that stop wells from filling with…
- Egress Window Installation in Nampa · Egress windows for finished basements: cut, framed…
How a Job Works in Nampa
Step 1: Call (208) 314-5276 or request a free basement inspection. We schedule a time that works for you, walk the basement and the exterior grade, and check the foundation walls, floor seams, window wells, and sump area. You get a straight answer about whether simple crack sealing will do or whether hydrostatic pressure means you need interior drain tile.
Step 2: We schedule the work and pull permits where Nampa requires them, which is common for structural foundation repair, egress window cutting, and anything that alters drainage or the sump discharge connection. On older downtown lots, access can be tight, so we plan equipment and spoil placement before we start. If you're in an HOA, we coordinate timing and documentation with the board.
Step 3: We clean up, haul away debris, and walk the job with you. You'll see the sump basin, the discharge line, and the check valve, and we'll explain how to test the pump and what to watch for during the next irrigation season. We leave your property clean and the work explained in plain terms.
Pricing in Nampa depends on the job. Foundation crack repair starts at $450, sump pump installation and replacement starts at $1,200, and a battery backup sump pump starts at $900. Interior drain tile runs from $50 per linear foot, exterior basement waterproofing from $95 per linear foot, and full basement waterproofing from $2,500. Foundation waterproofing starts at $3,500, basement wall sealing at $1,500, and bowing wall repair at $600. French drains start at $25 per linear foot, drain tile repair and replacement at $750, vapor barrier installation at $3 per square foot, window well drainage and repair at $650, egress window installation at $4,500, and basement mold remediation at $1,500. The key cost factors are basement size, access, wall condition, and urgency. Call (208) 314-5276 for a free estimate.
