A wet basement isn’t just inconvenient—it can lead to serious issues like mold, mildew, and structural damage, turning your usable space into a damp, unhealthy environment. The good news? You can waterproof your basement yourself without hiring expensive contractors—especially when using SEMCO Liquid Membrane™, a durable, easy-to-apply waterproofing solution that combines performance with style.
In this guide, we’ll explore the types of basement waterproofing, when to use them, and how you can apply SEMCO Liquid Membrane as an effective DIY basement waterproofing solution.
Why Waterproof Your Basement?
Water intrusion in basements can:
-
Damage foundations and walls
-
Create the perfect environment for mold and mildew
-
Reduce property value
-
Make basements unlivable or unsafe
Proactive basement waterproofing is the key to protecting your home and your health.
Interior vs. Exterior Basement Waterproofing
Interior Basement Waterproofing
Interior waterproofing focuses on sealing the inside of basement walls and floors to prevent moisture from entering your home. This method is often the most cost-effective and can be done by homeowners using a quality sealant like SEMCO Liquid Membrane™.
Key components:
-
Waterproof coatings or membranes applied to interior surfaces
-
Sump pumps to redirect water buildup
-
Dehumidifiers to manage humidity levels
Exterior Basement Waterproofing
Exterior solutions involve excavation and installation of drainage systems or barrier membranes around the home's foundation. While effective, exterior waterproofing is often expensive, labor-intensive, and typically requires professional installation.
Why Choose SEMCO Liquid Membrane™ for Basement Waterproofing?
SEMCO Liquid Membrane™ is a high-performance, elastomeric waterproofing system designed for easy application by both professionals and DIYers. Here’s why it’s the perfect choice for interior basement waterproofing:
-
✅ DIY-friendly: No special tools or experience required
-
✅ Superior adhesion to concrete, masonry, wood, and more
-
✅ Flexible and durable, ideal for floor-to-wall joints and movement-prone areas
-
✅ Paintable and color-customizable for a finished look
-
✅ Covers up to 800 sq. ft. (two coats with a 5-gallon bucket)
-
✅ Reduces relative humidity (RH) by up to 75%
-
✅ Handles up to 10 PSI vapor transmission pressure
Step-by-Step: How to Waterproof Your Basement with SEMCO Liquid Membrane
1. Prepare the Basement
Before application:
-
Remove any standing water using a wet/dry vacuum or pump
-
Allow the basement to fully dry
-
Clean the surfaces to ensure they’re free of dust, oil, or debris
2. Inspect and Repair Cracks
Fill visible cracks or holes with a hydraulic cement or SEMCO-compatible filler to prevent future seepage.
3. Apply SEMCO Liquid Membrane
Coating Process:
-
Apply 2 coats of SEMCO Liquid Membrane™ to walls and floors
-
Use a brush, roller, or sprayer depending on the surface area
-
Allow drying time between coats (as specified on product label)
Bonus: Use Anti-Fracture Fabric at Floor-Wall Joints
-
At the base where floors meet walls, install SEMCO Anti-Fracture Fabric
-
This helps manage flex and movement in these vulnerable areas, improving the longevity of your waterproofing system
4. Finish with Color or Paint (Optional)
SEMCO Liquid Membrane is available in a wide variety of colors. It can be left as-is or painted for an aesthetic finish that matches your basement style.
Is SEMCO Liquid Membrane Right for Your Basement?
If you’re dealing with:
-
Minor to moderate water seepage
-
Hairline cracks or moisture on walls
-
High humidity levels
-
Basement finishing or remodeling
Then SEMCO Liquid Membrane™ is the ideal DIY basement waterproofing solution for you. However, for major flooding or foundation issues, you may still want to consult a professional for exterior waterproofing solutions.
Conclusion: Protect Your Home with DIY Basement Waterproofing
Waterproofing your basement doesn’t have to be expensive or complicated. With the right tools and materials, like SEMCO Liquid Membrane, you can prevent costly water damage, improve air quality, and even increase your home's value—all on your own.
Ready to get started?
👉 Visit semcoworks.com to order SEMCO Liquid Membrane and transform your basement into a dry, safe, and stylish space.
