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Spokane/Basement Waterproofing

Basement Waterproofing in Spokane, WA

Spokane homeowners face semi-arid climate — drier than western washington with 17 inches of annual rainfall that accelerates wear on exterior surfaces. Our local pros understand your area's specific challenges and deliver quality work on every job.

Serving Spokane Valley, Liberty Lake, Cheney, Medical Lake, Mead, and surrounding Spokane communities.

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Why Spokane Homes Need Basement Waterproofing

Semi-arid climate — drier than western Washington with 17 inches of annual rainfall
Cold winters averaging 30°F with 43 inches of annual snowfall
Wildfire smoke from eastern WA, Idaho, and Montana fires August–September
Hot, dry summers averaging 84°F — fire weather conditions common
Rapid temperature swings: 60°F changes in a day during spring and fall
Common Home Types We Service
Craftsman bungalows in South Hill and South Manito neighborhoodsVictorian and Foursquare homes in Browne's AdditionRanch homes in suburban Spokane Valley and Liberty LakeNew construction in Cheney and Medical LakeCustom homes near Spokane River gorge

What You Get

Interior and exterior waterproofing solutions
Drain tile and sump pump systems
Foundation crack injection and repair
Dehumidification systems for humidity control
Transferable lifetime warranties available
Addresses the cause — not just symptoms

Our Basement Waterproofing Process

01

Water Source Diagnosis

We determine whether water is entering through the floor, wall cracks, cove joint, or window wells — each requires a different approach.

02

Solution Design

A comprehensive waterproofing plan is developed — interior drainage, exterior excavation, crack injection, or a combination.

03

Installation

For interior drainage: perimeter drain tile is installed, sump pit is excavated, and a sump pump is installed. Crack injection fills structural cracks from the inside.

04

Grading & Drainage

Exterior drainage improvements — grading, downspout extensions, window well drains — are addressed to reduce water pressure against the foundation.

Seasonal Considerations for Spokane

1
Snow removal from roofs and driveways (November–March)
2
Wildfire smoke ash cleanup on roofs and decks (August–September)
3
Spring Spokane River flooding near downtown
4
Summer exterior painting window (June–September — drier than western WA)
5
Fall gutter cleaning before first snow

Areas We Serve in Spokane

Our basement waterproofing pros are available throughout the Spokane metro area, including:

Spokane ValleyLiberty LakeCheneyMedical LakeMeadOtis OrchardsMillwoodVeradaleSouth HillBrowne's Addition

Basement Waterproofing FAQ for Spokane Homeowners

How often should Spokane homeowners get basement waterproofing?
Given Spokane's semi-arid climate — drier than western washington with 17 inches of annual rainfall, most homeowners benefit from basement waterproofing at least once a year. Snow removal from roofs and driveways (November–March) often makes spring or fall the optimal time to schedule service.
What home types in Spokane most need basement waterproofing?
Craftsman bungalows in South Hill and South Manito neighborhoods and Victorian and Foursquare homes in Browne's Addition are the most common home types in Spokane and typically see the most wear. Our local pros are familiar with the exterior materials found across the metro.
What causes a basement to leak?
The most common causes: hydrostatic pressure from saturated soil, cracks in the foundation wall or floor, failed parging or waterproofing membrane, poor grading directing water toward the home, and clogged or inadequate drainage.
Interior vs. exterior waterproofing — which is better?
Exterior is the ideal solution but requires excavating around the entire foundation — expensive and disruptive. Interior drainage systems manage water that gets in and are more practical for most existing homes. The right answer depends on the specific water entry point.
How much does basement waterproofing cost?
Interior drainage systems run $5,000–$15,000. Exterior waterproofing with excavation is $20,000–$50,000+. Crack injection for single cracks runs $500–$3,000.
Will waterproofing allow me to finish my basement?
Yes. A properly waterproofed basement with humidity control is safe to finish with framing, insulation, and drywall. An active water problem must be fully resolved before finishing.

Other Services in Spokane

Crawl Space EncapsulationFoundation RepairSump Pump Installation & Repair

Book Basement Waterproofing in Spokane

Get a free quote from a local pro. We serve Spokane Valley, Liberty Lake, Cheney, and all surrounding Spokane communities.

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