Waterproofing a basement is essential in protecting your home from water damage and maintaining a safe, dry environment. However, homeowners often need to correct their mistakes during the process, which can lead to bigger problems in the future.
Below are some of the most common mistakes made when waterproofing basements, along with explanations and tips on avoiding them.
Let’s get straight to the point.
Common basement waterproofing mistakes include over-relying on waterproof paint, which offers only a temporary fix, and draining flooded basements too quickly, risking structural damage. Other errors involve skipping proper drying time, neglecting soil management around the foundation, improperly sealing cold joints, and failing to maintain gutters and roof runoff systems.
Delaying waterproofing, overlooking proper drainage systems, neglecting settling walkways, and attempting DIY structural repairs without expertise also lead to bigger issues. Combining interior and exterior waterproofing solutions, addressing issues early, and consulting professionals are key to long-term basement protection.
Over-Reliance On Waterproof Paint
Waterproof paint is often seen as an easy solution to basement water problems.
However, it only provides a surface-level fix and fails to address the underlying causes of moisture intrusion, potentially leading to bigger issues later.
- Short-term solution: Waterproof paint creates a temporary barrier, but it starts to break down with constant exposure to moisture. Over time, it doesn’t stop water from infiltrating, and recurring moisture problems will still surface.
- Peeling and bubbling: As moisture penetrates behind the paint, lime deposits build up, leading to peeling, bubbling, and eventual cracking. The paint becomes ineffective and can worsen the basement’s appearance.
- Better alternative: A more comprehensive approach involves waterproofing sealants, drainage systems, and other professional-grade solutions. These methods tackle the source of the problem, providing a more lasting solution to moisture issues.
Draining Flooded Basements Too Quickly
While it’s natural to want to clear water from a flooded basement immediately, doing so too quickly can cause more harm than good.
Taking your time with water removal is essential to protect the structural integrity of your basement walls.
- Pressure imbalance: When water is removed too quickly, it can create a hydrostatic pressure imbalance, causing the basement walls to bear too much weight from outside water. This can lead to cracks, bowing, or even wall collapse.
- Slow water removal: Gradually draining the water allows pressure to equalise, minimising the risk of structural damage. Slow removal also prevents soil from shifting dramatically around the foundation.
- Professional advice: In cases of severe flooding, it’s critical to consult a professional who understands how to manage water levels safely and prevent further damage. Their expertise can ensure safe, controlled water extraction.
Ignoring Proper Drying Time
Jumping into waterproofing projects without allowing the basement to fully dry can lead to significant problems.
Skipping the drying process can result in mould growth and compromised foundation strength, creating long-term issues.
- Moisture damage: Wet surfaces are breeding grounds for mould, mildew, and bacteria, which can cause health problems and damage building materials. If waterproofing begins before the area is dry, these issues can persist.
- Weakened structure: Moisture trapped in walls, flooring, or ceilings can lead to cracks and structural weakness over time. The foundation’s integrity may be compromised if the drying process is rushed.
- Inspection before waterproofing: Allow ample time for the basement to dry fully before applying any materials. Checking for pre-existing water damage can also help prevent future complications.
Poor Soil Management Around The Foundation
The soil around your foundation is critical in preventing basement water issues. Proper grading and healthy, compact soil can minimise water pressure on basement walls.
- Improper grading: If the ground around your home slopes toward the foundation, water will naturally flow towards the basement, increasing the risk of leaks. A properly graded yard ensures water flows away from the foundation.
- Dense soil traps water: Compacted soil around the foundation can retain water, creating pressure on basement walls and leading to leaks or structural damage. Well-draining soil is essential for reducing hydrostatic pressure.
- Solution: To minimise water infiltration, ensure the soil slopes away from the foundation. Filling low areas that might collect water is also key to preventing water buildup near your basement walls.
Sealing Cold Joints Incorrectly
Cold joints, where the floor meets the walls, are often mistaken as easy-to-seal areas, but sealing them improperly can worsen water issues.
Managing water with a proper drainage system is a more effective way to handle these joints and relieve pressure.
- Pressure buildup: Sealing cold joints can cause water pressure to build up in basement walls, leading to leaks in other areas. Rather than stopping the water, it redirects the issue, creating more vulnerabilities.
- Incorrect sealing materials: Using materials like cement to seal these joints often blocks the natural flow of water, leading to pressure buildup. These materials can crack or break over time, leaving the basement exposed.
- Better approach: Instead of sealing cold joints directly, install a drainage system that captures water before it can cause pressure-related damage. Drainage systems safely divert water away from vulnerable areas.
Neglecting Gutter And Roof Runoff Systems
Gutters and downspouts are key to keeping water away from your home’s foundation.
Regularly maintaining and extending them ensures that roof runoff doesn’t pool near the basement, preventing potential flooding.
- Overflowing gutters: When gutters aren’t cleaned regularly, leaves and debris can block them, causing water to overflow and pool near the foundation. This can eventually lead to water seeping into the basement.
- Water from the roof: If rainwater isn’t diverted far enough from the foundation, it can infiltrate the basement through cracks or porous walls. Proper drainage is critical for reducing this risk.
- Proper drainage system: Ensure that your gutters function correctly and that downspouts extend at least eight feet from the house. This helps to prevent water from accumulating near the foundation, reducing the chances of water intrusion.
Delaying Waterproofing
Procrastination regarding waterproofing can lead to expensive repairs and more severe damage to your basement and foundation. Taking preventative measures early on can save you money and headaches.
- Mould growth: Even small amounts of moisture can encourage mould and mildew to develop, spreading rapidly if left unchecked. Mould can damage building materials and create unhealthy indoor environments.
- Structural damage: Moisture weakens your home’s foundation over time, causing cracks, settling, or even collapse in extreme cases. Addressing these issues early on can prevent more significant structural concerns.
- Start early: Waterproofing your basement at the first sign of moisture can prevent the need for costly repairs. Even minor dampness can lead to bigger problems if ignored, so acting as soon as possible is best.
Poor Drainage Management Around The Home
Proper drainage around your home is critical in keeping water away from the foundation and out of your basement.
Incorporating French drains or other systems ensures effective water management and reduces the risk of leaks.
- Improper landscaping: When landscaping doesn’t account for water flow, it can inadvertently direct water toward your foundation. Poor drainage around the home increases the risk of basement water problems.
- Lack of drainage systems: Without proper drainage systems like French drains or sump pumps, water accumulating near the foundation will eventually reach your basement. Installing these systems is essential to managing water flow effectively.
- Effective water redirection: Proper grading, exterior drainage tiles, and sump pumps can help direct water away from your home and basement. This minimises water intrusion and protects your foundation from damage.
Overlooking Settling Walkways
Walkways that have settled over time can unintentionally direct water toward your foundation. Regular inspections and repairs to these walkways help prevent water pooling and reduce the risk of basement flooding.
- Water pooling: As walkways settle and crack, they create low points where water can accumulate, eventually seeping into the foundation. This can lead to moisture issues in the basement, even in areas that initially seem unaffected.
- Impact on the foundation: Over time, water pooling near the foundation weakens the structure and increases the risk of cracks and leaks. Regularly maintaining settling walkways is essential to preventing water from reaching your foundation.
- Fix walkways: Ensure that walkways around your home are sloped away from the foundation. Regularly inspecting and repairing cracks or depressions can prevent water buildup and help protect your basement from flooding.
Attempting DIY Structural Repairs
Many homeowners try to fix cracks and structural issues in the basement themselves, often needing more knowledge.
Consulting a professional for such repairs is the best way to ensure the problem is properly addressed without causing further damage.
- Insufficient knowledge: DIY repairs can seem like a cost-effective solution, but without the right expertise, homeowners often only fix the symptoms of a problem rather than address its root cause. Improper repairs can even exacerbate issues.
- Potential damage: Using the wrong materials or applying them incorrectly can lead to more extensive damage over time. Mismanaged repairs can result in leaks, wall failures, or costly structural repairs in the future.
- Professional assessment: It’s always best to hire a professional to assess and repair structural damage in the basement. A proper evaluation ensures the issue is correctly addressed, preventing future problems.
Failing To Use Proper Interior And Exterior Waterproofing Solutions
Focusing on only one type of interior or exterior waterproofing leaves your basement vulnerable to water damage.
Combining both approaches is critical to achieving long-term, effective basement protection.
- Interior-only solutions: Interior waterproofing techniques, such as sump pumps or interior sealants, help manage water that enters the basement. However, they don’t stop water from penetrating the walls in the first place.
- Exterior-only solutions: Exterior waterproofing systems, like drainage tiles or waterproof membranes, help prevent water from reaching the foundation but might not fully protect against moisture that finds its way inside.
- Combination approach: Interior and exterior waterproofing methods provide the most comprehensive protection. Exterior systems prevent water infiltration, while interior methods manage any moisture that does get through.
Conclusion
Basement waterproofing mistakes can lead to costly repairs and long-term damage to your home. Avoiding common errors—such as overreliance on waterproof paint, improper soil management, and neglecting drainage systems—can make all the difference.
By using the right combination of interior and exterior solutions, addressing problems early, and consulting professionals when necessary, you can keep your basement dry and structurally sound for years.
FAQs About Waterproofing
Why Does My Basement Leak When It Rains?
The most common cause of basement leaks is the pressure from the water surrounding the foundation’s soil. During heavy or persistent rain periods, the soil can become saturated, creating hydrostatic pressure (or water pressure) that can push moisture and water through your basement walls and floor.
How Do I Stop My Basement From Flooding In Heavy Rain?
Installing an internal drainage system is the most effective way to keep rainwater out of your basement. A proven solution for keeping the basement dry, a good waterproofing system minimises hydrostatic pressure. An interior drain tile connects to a sump pump.
Should Basement Walls Have A Vapor Barrier?
It provides the best coverage and R-value and functions as a moisture barrier in and of itself. But if you use fibreglass insulation batts, a moisture barrier will prevent water and moisture from entering your walls and creating mould and mildew.
Is It Common For Basements To Flood?
Basements are vulnerable to flooding because they’re built partially, if not fully below ground. For this reason, basement floods can occur outside of rainy seasons, and rapid snow melts at any time of year, even when the weather conditions are dry.
How Do I Stop Hydrostatic Water In My Basement?
To relieve hydrostatic pressure around a basement, tap into the water source by drilling weep holes into the hollow cores of the bottom row of blocks. This will allow the water to drain; now, you must install a baseboard system to collect the water and drain it to your sump pump.