Waterproofing Your Home’s Exterior: Best Practices for Long-Lasting Results

Waterproofing your home’s exterior is crucial in protecting it from water damage, which can lead to structural issues, mold growth, and decreased property value. 

This article provides an overview of best practices for waterproofing, including the importance of the process, key areas to focus on, recommended materials, and effective techniques to ensure long-lasting results.

Why You Shouldn’t Skip Waterproofing

Waterproofing is not just about how to prevent water from getting inside; it’s about keeping your home's structural integrity intact and maintaining its value. Here’s what proper waterproofing can do for you.

Extend Your Home’s Lifespan

By shielding your home from water damage, you prevent issues that could compromise its structure over time, such as wood rot and foundation cracks. This reduces the need for frequent repairs and keeps your home standing strong for years.

Increase Property Value

A well-waterproofed home is far more appealing to potential buyers, who prioritize properties that are safe from water damage. Proper waterproofing can boost your home’s market value, making it a wise investment.

Enhance Energy Efficiency

Good waterproofing prevents moisture from seeping into insulation, which can cause inefficiencies in heating and cooling your home. This leads to lower energy bills and a more comfortable living environment.

Prevent Mold and Mildew

Moisture buildup can create the perfect environment for mold and mildew growth. By keeping your home dry, you protect your family's health and the integrity of your home’s structure.

Maintain Aesthetic Appeal

Water damage often leads to unsightly stains, peeling paint, and other cosmetic issues. Proper waterproofing helps preserve your home’s curb appeal and keeps it looking its best.

DANGERS OF HOME MOLD: Mold exposure can lead to difficulty breathing, eye irritation, headache, nasal congestion, rashes, and other symptoms. Those with respiratory conditions and compromised immune systems are more vulnerable to mold's health risks.

Identifying Key Risk Areas

Some parts of your home are more susceptible to water damage. Understanding these areas allows you to take preemptive measures.

• Roof: Whether flat or sloped, roofs are vulnerable to pooling water and shingle wear. Gutters should be kept in good working condition to prevent overflow.
• Exterior Walls: Gaps in siding materials like vinyl, wood, or stucco, and poorly sealed windows and doors, create entry points for water.
• Foundation: Basement walls and slab foundations can suffer from hydrostatic pressure, leading to water seepage. Crawl spaces with poor drainage are also at risk.

By identifying and addressing these vulnerable areas and water damage signs, homeowners can significantly reduce the risk of damage and maintain the integrity of their home’s exterior.

Waterproofing Materials and Products

When selecting waterproofing materials, it is essential to consider the specific surface and environmental conditions. Different surfaces require tailored solutions to ensure effective and long-lasting waterproofing. Below are some of the best materials for various surfaces.

Roofs

1. Liquid Applied Membranes: These are versatile and can be applied to various roof types, including flat and sloped roofs. They form a seamless, flexible layer that adapts to the roof’s movements.
   • Acrylic: UV resistant and suitable for mild climates.
   • Polyurethane: Highly flexible and durable, ideal for areas with extreme weather conditions.
   • Silicone: Excellent for roofs with frequent water pooling due to its water repellency.
   • Waterproof Sealant/Coating: Liquid Rubber’s Waterproof Sealant/Coating and other sealants can be used in a more localized manner, typically along seams, joints, and cracks.
2. Sheet Membranes: These are pre-formed sheets that are applied to the roof surface.
   • EPDM (Ethylene Propylene Diene Monomer): A synthetic rubber membrane known for its durability and resistance to UV radiation.
   • TPO (Thermoplastic Olefin): Offers heat-welded seams for added strength and is environmentally friendly.
   • PVC (Polyvinyl Chloride): Provides excellent chemical resistance and is suitable for roofs exposed to industrial pollutants.

Exterior Walls

1. Waterproofing Paints and Coatings: These are applied like regular paint but provide a waterproof barrier.
   • Elastomeric Paint: Highly flexible and can bridge small cracks, making it ideal for masonry and stucco walls.
   • Acrylic Coatings: Provide a breathable yet waterproof layer, suitable for various wall types.
   • Polyurethane Coatings: A good choice for exterior surfaces such as decks and patios. With Liquid Rubber’s Premium Polyurethane Deck Coating, you can create a more durable outdoor space that is 10x stronger than normal deck paint.
2. Sealants: Used to fill gaps and cracks in walls to prevent water ingress.
   • Silicone Sealants: Highly flexible and durable, suitable for joints and cracks.
   • Polyurethane Sealants: Offer excellent adhesion and flexibility, ideal for larger gaps.
3. Waterproofing Membranes: These can be applied to the exterior surface of walls.
   • Bituminous Membranes: Provide a robust barrier against water and are often used with other materials.
   • Liquid Applied Membranes: Offer seamless coverage and are suitable for complex wall geometries.

Foundations

1. Cementitious Waterproofing: These are easy to apply and bond well with concrete surfaces.
   • Cement-Based Coatings: Provide a rigid waterproof layer for both positive and negative side waterproofing.
   • Crystalline Waterproofing: Penetrates the concrete to form crystals that block water pathways, ideal for new and existing structures.
2. Bentonite Clay: Expands when wet to form an impermeable barrier, often used in below-grade applications.
   • Bentonite Panels: Pre-formed panels that can be applied to foundation walls.
   • Bentonite Sheets: Flexible sheets that can be molded to fit various foundation shapes.
3. Sheet Membranes: Provide a continuous barrier against water ingress.
   • HDPE (High-Density Polyethylene) Sheets: Offer excellent chemical resistance and durability.
   • Self-Adhering Membranes: Easy to apply and provide a strong bond to the foundation surface.
4. Foundation Sealants: Provide a protective waterproof barrier.
   • Foundation Sealants and Basement Coatings: A water-based, non-toxic, and VOC-free sealant suitable for waterproofing foundations and basements, such as the Liquid Rubber Foundation Sealant/Basement Coating.

By selecting the appropriate waterproofing materials for each surface, homeowners can ensure effective protection against water damage and extend the lifespan of their property.

Go Green: Eco-Friendly Waterproofing Options

If you’re environmentally conscious, consider these eco-friendly waterproofing alternatives:

• Soy-Based Sealants: Made from renewable soybeans, these sealants are biodegradable and non-toxic.
• Water-Based Coatings: Emitting fewer volatile organic compounds (VOCs), they’re safer for both the environment and the air quality inside your home.
• Recycled Rubber Membranes: Durable and efficient, repurposed waste materials like old tires offer a sustainable waterproofing solution.

Advantages of Eco-Friendly Options

• Reduced Toxicity: Lower levels of harmful chemicals make these products safer for installers and residents.
• Sustainability: Using renewable or recycled materials helps conserve natural resources and reduce waste.
• Regulatory Compliance: Many eco-friendly products meet or exceed environmental regulations, ensuring local and national standards compliance.

Considerations

• Performance: While eco-friendly products are generally effective, choosing the right product for the specific application is essential to ensure optimal performance.
• Availability: Some eco-friendly options may be less readily available than traditional products, potentially requiring special orders or sourcing from specialized suppliers.
• Cost: Although prices are becoming more competitive, some eco-friendly waterproofing solutions may still carry a premium compared to conventional alternatives.

ECO-FRIENDLY TIP: Recycling just one tire can save over seven gallons of oil. By using recycled rubber membranes, you waterproof your home and reduce waste that would otherwise end up in landfills.

Prepping Your Home for Waterproofing Success

Preparation is key for effective waterproofing. Follow these steps to ensure a solid foundation.

1. Clear the Area: Remove any loose debris, dirt, and vegetation. A clean surface allows for better adhesion of waterproofing materials.
2. Inspect and Repair: Check surfaces for any signs of damage, including cracks. Repair any existing damage, such as filling cracks or replacing deteriorated materials.
3. Moisture Test: Use a moisture meter to ensure that surfaces are dry before applying waterproofing products.

Fix Existing Damage Before Waterproofing

Don’t jump straight into waterproofing without first addressing any existing damage. Here's what you should do.

1. Seal Foundation Cracks: For small cracks, use hydraulic cement or epoxy injections. For larger issues, consider consulting a professional to ensure proper repair.
2. Roof Repairs: Replace worn-out shingles and repair any flashing to prevent future leaks.
3. Wall Repairs: Repoint brickwork and fill any cracks with suitable caulk before waterproofing.

NOT A MODERN INVENTION: Waterproofing has been around for thousands of years. Ancient civilizations and hunter-gatherers sealed their boats with bitumen emulsion to make them waterproof.

Effective Waterproofing Techniques

Here’s how to keep water out where it doesn’t belong:

1. Seal Walls: Apply coatings and membranes to create a protective layer on exterior walls, keeping them dry and structurally sound.
2. Waterproof the Roof: Use roof sealants or membranes to prevent leaks and extend the roof’s lifespan.
3. Protect Foundations: Exterior waterproofing membrane systems offer strong protection against water seepage. Interior coatings are also helpful in managing minor leaks.

Keep Your Waterproofing Fresh

Waterproofing is not a one-time project. Regular maintenance and reapplication ensure that you keep your home protected:

• Roofs: Depending on your materials and climate, reapply roof waterproofing every 5-10 years.
• Exterior Walls: Plan to refresh the waterproofing on exterior walls every 3-5 years, especially if you live in a harsh climate.
• Foundations: Foundation waterproofing can last anywhere from 10-20 years, but it’s important to monitor moisture levels and unusual wear.

What are the best maintenance tips?

To extend the life of waterproofing and ensure its effectiveness, regular maintenance is crucial:

• Regular Inspections: Conducting periodic inspections can help identify issues early and prevent extensive damage.
• Cleaning: Keeping surfaces clean can prevent the buildup of debris that can degrade waterproofing materials.
• Prompt Repairs: Addressing minor issues promptly can prevent them from becoming major problems that require extensive reapplication.

By adhering to these guidelines, homeowners can ensure that their waterproofing remains effective, protecting their homes from water damage and extending the life of the waterproofing materials.

DIY or Hire a Professional?

Deciding whether to tackle waterproofing yourself or hire a professional depends on the complexity of the job and your comfort level with DIY projects:

• DIY Benefits: It's cost-effective and allows you greater flexibility. For simple tasks like applying sealant or waterproof paint, DIY is a viable option.
• DIY Drawbacks: Waterproofing requires precision and an understanding of building materials. Mistakes can be costly, both in terms of time and materials.
• When to Hire a Professional: When your home has significant or extensive damage or if specialized methods (like exterior drainage systems) are needed, hiring a professional ensures the job gets done right.

Avoid Common Waterproofing Mistakes

Waterproofing mistakes can undermine your efforts. Here’s what to watch out for:

• Skipping Surface Prep: Never apply waterproofing to dirty or damaged surfaces. Clean and repair them first for the best results.
• Using Incorrect Materials: Match the right type of waterproofing material with the specific surface and environmental conditions. Using incompatible products can lead to failure.
• Inadequate Application: Ensure even coverage and consider applying multiple layers if needed. Follow manufacturer instructions to the letter.
• Neglecting Maintenance: Regular inspections help you catch and repair small issues before they become major problems.

Tips for a Successful Waterproofing Project

To get the best results from your waterproofing project, follow these tips:

• Thorough Cleaning: Begin by cleaning all surfaces to remove debris, mold, or peeling paint that could disrupt the adhesion of waterproofing materials.
• Correct Material Selection: Choose high-quality, appropriate materials for each surface you’re treating. Don't skimp on quality—it pays off in the long run.
• Layered Application: Apply waterproofing products in multiple, even layers to strengthen the protective barrier.
• Regular Checks: Inspect waterproofed areas regularly. Early detection of wear and tear allows you to reapply materials before issues arise.

QUICK MOLD DEVELOPMENT: Mold spores can grow within 24 to 48 hours in moist conditions. This highlights the importance of prompt and effective waterproofing to prevent mold infestations.

The Takeaway: Partner With the Best

Waterproofing is your home’s shield against water damage, which is vital in preserving its structure and value. From the roof to the foundation, each area requires specific approaches and materials.

Choose reputable, environmentally friendly products like those from Liquid Rubber to ensure top-notch waterproofing. At Liquid Rubber, we have a wide range of high-quality, environmentally friendly products designed for various applications. We have everything you need for any home project, from sealing a flat roof to sealing your foundation. We also have great offers for contractors! If you’re a contractor, or know someone who is, check out our Free Contractor Club today for 20-30% off.

Whether you’re tackling a DIY project or hiring a professional, your home’s protection is an investment worth making.