How to Stop Water from Coming Through Basement Walls

If you’re dealing with water coming through your basement walls, you need solutions fast. This comprehensive guide shows you exactly how to stop water infiltration, from emergency fixes to permanent professional solutions.

Understanding Why Water Comes Through Basement Walls

Before fixing the problem, understanding the cause helps you choose the right solution:

Common Causes of Water Infiltration

• Hydrostatic pressure - Water table pushing against foundation
• Poor drainage - Water pooling around foundation
• Foundation cracks - Direct pathways for water entry
• Failed waterproofing - Deteriorated sealants or membranes
• Window well issues - Poor drainage or sealing
• Concrete porosity - Natural water absorption

Immediate Steps to Stop Water

Emergency Actions (First 24 Hours)

1. Move valuables away from wet areas
2. Set up dehumidifiers to prevent mold growth
3. Document damage for insurance claims
4. Apply hydraulic cement to active leaks
5. Install temporary drainage to redirect water
6. Contact professionals for major flooding

Quick DIY Fixes

1. Hydraulic Cement for Active Leaks

Cost: $15-25 per container
Time: 30 minutes per crack
Effectiveness: Temporary (6-12 months)

Steps:

1. Clean the crack with wire brush
2. Mix hydraulic cement per instructions
3. Press firmly into crack
4. Hold for 3-5 minutes until set
5. Apply waterproof coating once dry

2. Waterproofing Paint/Sealers

Cost: $30-50 per gallon
Coverage: 75-100 sq ft per gallon
Effectiveness: Minor seepage only

Best for:

• Damp walls without active leaks
• Concrete block walls
• Minor moisture issues
• Temporary protection

3. Crack Injection (Polyurethane/Epoxy)

Cost: $300-500 per crack (DIY kit)
Time: 2-3 hours per crack
Effectiveness: Excellent for non-structural cracks

Process:

1. Install injection ports along crack
2. Seal crack surface with epoxy paste
3. Inject polyurethane foam or epoxy
4. Remove ports after curing
5. Grind smooth and seal

Professional Solutions to Stop Water Permanently

Interior Waterproofing Systems

French Drain Installation

How it works: Channels water to sump pump before it enters living space
Cost: $3,000-8,000
Effectiveness: 95% success rate
Disruption: Minimal (work inside only)

Components:

• Perimeter drain tile
• Gravel bed
• Vapor barrier
• Sump pump system
• Battery backup

Advantages:

• No exterior excavation needed
• Year-round installation possible
• Less expensive than exterior methods
• Addresses hydrostatic pressure

Exterior Waterproofing Solutions

Full Excavation & Membrane

How it works: Stops water at the source before reaching walls
Cost: $15,000-30,000
Effectiveness: 99% success rate
Disruption: Major (excavation required)

Process:

1. Excavate to footer level
2. Clean and repair foundation
3. Apply waterproof membrane
4. Install drainage board
5. Place weeping tile
6. Backfill with gravel

Benefits:

• Permanent solution
• Protects foundation structure
• Increases property value
• Lifetime warranty available

Combination Approach

Many homes benefit from both interior and exterior solutions:

• Exterior membrane for primary protection
• Interior system for redundancy
• Proper grading and drainage
• Regular maintenance program

Preventing Water from Coming Through Walls

Exterior Prevention

1. Maintain gutters - Clean 2x yearly, extend downspouts 6+ feet
2. Grade properly - Slope away from foundation (6” drop over 10’)
3. Seal foundation - Apply sealant to exterior cracks annually
4. Window well covers - Install covers and ensure proper drainage
5. Landscape wisely - Avoid water-trapping plants near foundation

Interior Prevention

1. Monitor humidity - Keep below 50% with dehumidifier
2. Inspect regularly - Check for new cracks monthly
3. Maintain sump pump - Test monthly, service annually
4. Seal penetrations - Caulk around pipes and utilities
5. Waterproof coating - Reapply every 3-5 years

Cost Comparison: DIY vs Professional

Solution	DIY Cost	Professional Cost	Longevity	Effectiveness
Hydraulic Cement	$15-25	$200-400	6-12 months	Temporary
Crack Injection	$300-500	$500-1,500	10-20 years	Excellent
Interior System	Not recommended	$3,000-8,000	25+ years	Very Good
Exterior Waterproofing	Not recommended	$15,000-30,000	Lifetime	Best

When to Call Professionals

Contact waterproofing experts immediately if you notice:

• Multiple cracks or growing cracks
• Water pooling on floor
• Efflorescence (white powder) on walls
• Mold growth
• Foundation movement
• Recurring leaks after DIY attempts

The DrySpace Advantage

At DrySpace Waterproofing, we specialize in stopping water infiltration permanently:

✓ Free inspection to identify all water sources
✓ Custom solutions for your specific situation
✓ Lifetime warranty on waterproofing systems
✓ 24/7 emergency response available
✓ Licensed & insured professionals

Take Action Today

Don’t let water damage get worse. Whether you need emergency help or want to prevent future problems:

Call (437) 545-0067 for immediate assistance
Book online for free inspection
Email info@dryspacewaterproofing.ca

Frequently Asked Questions

Can I just paint over water stains?

No. Painting over water damage without addressing the source will lead to paint failure and continued water infiltration. Always fix the water source first.

How quickly should I address water coming through walls?

Immediately. Water damage compounds quickly, leading to mold growth (24-48 hours), structural damage, and higher repair costs.

Will homeowner’s insurance cover the repairs?

Coverage varies. Sudden water damage is often covered, but gradual seepage typically isn’t. Document everything and contact your insurer promptly.

Can I waterproof just one wall?

While possible, water will find the next weakest point. Comprehensive waterproofing provides better long-term results and value.

How long does professional waterproofing take?

Interior systems: 1-3 days
Exterior waterproofing: 3-7 days
Crack repairs: 2-4 hours per crack

Related Resources

• Complete Basement Waterproofing Guide
• Basement Waterproofing Cost Calculator
• Emergency Water Damage Services
• Foundation Crack Repair Guide