Regarding basement waterproofing, homeowners often face the critical decision of choosing between interior or exterior waterproofing methods.
Both approaches have advantages, but determining which is the best option for your specific situation can significantly affect the longevity and health of your home. This article will explore both methods’ pros and cons, helping you make an informed decision.
Let’s get straight to the point.
When deciding between interior and exterior basement waterproofing, each method has its advantages.
Exterior waterproofing prevents water from entering the basement by addressing the root cause and offering long-term protection, but it is more expensive and labour-intensive. Interior waterproofing manages water that has already entered the home and is less costly upfront but requires ongoing maintenance.
Ultimately, exterior waterproofing is ideal for homeowners seeking a permanent solution, while interior waterproofing suits those with smaller budgets or where excavation is impractical. Consulting a specialist can help determine the best solution for your home.
Exterior Basement Waterproofing
How Does Exterior Basement Waterproofing Work?
Exterior waterproofing focuses on preventing water from entering the basement. This method typically involves excavating the soil around the foundation to install waterproof barriers and drainage systems.
These barriers prevent water from seeping through the basement walls. Exterior waterproofing also often includes installing a drainage system at the base of the foundation, which helps divert water away from the house.
This prevents the build-up of hydrostatic pressure that can cause water seepage through cracks in the foundation.
Pros Of Exterior Waterproofing
- Comprehensive Protection: Exterior waterproofing provides thorough protection by tackling the water problem from the outside and stopping it at the source. This means the foundation is protected from moisture build-up, reducing the risk of cracks and structural damage.
- Long-Lasting Solution: Because it addresses the root cause of water intrusion, exterior waterproofing is considered a more permanent solution. Properly installed systems can last decades without needing major maintenance.
- Protects Foundation from Hydrostatic Pressure: Exterior waterproofing helps minimise the risk of foundation cracks by reducing hydrostatic pressure. As water is diverted from the structure, the risk of water forcing its way into the foundation is reduced.
Cons Of Exterior Waterproofing
- Cost and Labour Intensive: One major drawback of exterior waterproofing is the cost and effort involved. Excavating the soil around the foundation is labour-intensive. If there are driveways, landscaping, or other structures around the home, these may need to be removed or disrupted during the process.
- Time-consuming: Due to the extensive excavation and installation process, exterior waterproofing can take a considerable amount of time to complete, which can be inconvenient for homeowners.
- Requires Access to the Foundation: If your home has limited space between properties or obstacles like patios or decks, accessing the foundation for exterior waterproofing can be challenging.
Interior Basement Waterproofing
How Does Interior Basement Waterproofing Work?
Interior waterproofing is more about managing the water that has already entered or may enter the basement.
It typically involves installing an internal drainage system that channels water to a sump pump, which removes it from the home. Additionally, waterproof coatings can be applied to basement walls to prevent moisture from seeping through.
Pros Of Interior Waterproofing
- Less Expensive: Interior waterproofing is generally more affordable than exterior waterproofing because it does not require excavation. The materials and labour involved are simpler and more accessible.
- Easier to Install: Installing an interior waterproofing system is far less disruptive to the home. It can often be done in a matter of days without needing heavy equipment or removing landscaping and driveways.
- Effective at Managing Water: Although it doesn’t prevent water from entering the basement, interior waterproofing can be highly effective at controlling and redirecting water to prevent flooding. Sump pumps and internal drainage systems dry basements, even during heavy rainfall.
Cons Of Interior Waterproofing
- Doesn’t Stop Water at the Source: Unlike exterior waterproofing, interior methods don’t stop water from reaching the foundation walls. Instead, they manage water once it has entered the structure. Over time, this can lead to moisture build-up, increasing the risk of mould and dampness.
- Regular Maintenance Required: Interior waterproofing systems, such as sump pumps, require regular maintenance to ensure they function properly. If not properly maintained, pumps can fail, and drainage systems can become clogged, leading to basement flooding.
- Can Still Experience Water Damage: Because interior waterproofing doesn’t address the root cause of water intrusion, you may still experience water damage to your foundation over time. This can result in cracks, mould growth, and potential structural problems.
Comparing Exterior And Interior Waterproofing
Effectiveness Comparison
When determining the most effective waterproofing method, it’s crucial to consider your home’s specific circumstances. Exterior waterproofing is typically considered the more effective solution because it prevents water from entering the basement entirely, making it ideal for long-term protection.
Exterior waterproofing addresses the root cause of water intrusion by creating a barrier around the foundation. However, due to the significant excavation involved, exterior waterproofing may only sometimes be practical or within budget.
In such cases, interior waterproofing becomes a viable option. It effectively manages water that does enter the home and prevents flooding through systems like sump pumps and drainage solutions.
Cost Comparison
Cost plays a critical role in deciding between interior and exterior waterproofing. Interior waterproofing is generally less expensive initially since it doesn’t require extensive excavation or heavy-duty materials.
Labour costs for interior systems are also lower, making it a more budget-friendly option for many homeowners. However, if water issues persist or worsen, you may incur additional repairs or system upgrade costs.
While exterior waterproofing is more costly at the outset due to excavation and specialised barriers, it can offer long-term savings by preventing recurring water damage and reducing the need for frequent repairs or maintenance, making it a solid investment.
Maintenance
The level of maintenance required for each waterproofing method varies significantly. Exterior waterproofing systems generally require minimal maintenance after installation.
Once the drainage systems and barriers are in place, they work continuously to protect your home’s foundation with little need for regular upkeep. On the other hand, interior waterproofing systems like sump pumps and internal drainage solutions demand more attention.
These systems require regular checks to ensure that pumps function and drainage channels remain clear. If maintenance is neglected, system failure can occur during heavy rainfall or flooding, potentially damaging basement water.
When To Choose Interior Waterproofing
Interior waterproofing is a good choice if your budget is tight or you need a quicker solution to address water intrusion. It’s also ideal when excavation isn’t an option due to the presence of landscaping, patios, or other external obstacles.
In these cases, interior systems can efficiently manage water penetrating the basement, diverting it away through drainage channels and sump pumps. This method provides sufficient protection for homes with minor or occasional water issues without the higher costs associated with exterior waterproofing, making it a practical choice for many homeowners.
When To Choose Exterior Waterproofing
Homeowners seeking a long-term, robust solution should consider exterior waterproofing. It directly addresses water intrusion by stopping it before reaching the foundation, making it a superior choice for homes with serious water problems or areas prone to heavy rainfall.
Although the upfront costs and labour are higher, exterior waterproofing offers peace of mind by safeguarding the structure from water damage and preventing future issues. For those willing to invest in a permanent solution and protect their home’s foundation, exterior waterproofing is the preferred method, ensuring both durability and comprehensive protection.
Conclusion
The decision between interior and exterior basement waterproofing depends on your home’s specific needs, your budget, and the extent of the water problems. If you’re looking for a long-term solution that tackles water at the source, exterior waterproofing is the way to go.
However, if you’re after a more affordable and less disruptive solution, interior waterproofing can still be highly effective in managing water once it enters your home. By weighing the pros and cons of each method, you can choose the best basement waterproofing solution for your home.
FAQs About Waterproofing
Is Waterproofing A Basement Worth It?
The number one reason that basement waterproofing is worth it for almost every homeowner is reinforcing your home’s foundation. While some basement waterproofing systems directly fortify the foundation with membranes, any waterproofing system will protect it against moisture problems.
How Much Does It Cost To Waterproof A Basement From The Inside?
The average cost to waterproof a basement is $1,920 to $6,320, or between $3 and $9 per square foot for materials and labour. Interior basement repairs that don’t require excavation cost around $500 to $1,500, whereas large extensive repairs with drainage and foundation issues run $10,000 or more.
How Long Does Basement Waterproofing Last?
The length of time waterproofing lasts depends on several factors, including the amount of waterproofing product used, climate, and the severity of the initial damage. A set date with all the constituents has yet to be set, but most professionals will warranty it for about ten years.
Can I Combine Both Methods For Better Protection?
Combining interior and exterior waterproofing can provide comprehensive protection, especially for homes prone to heavy rainfall or significant water issues. This approach offers both immediate and long-term solutions.
Can Interior Waterproofing Prevent Mould And Dampness?
While interior waterproofing can manage water once it enters the basement, it doesn’t prevent moisture from reaching the walls. Over time, this may increase moisture build-up, resulting in mould and dampness.
