5 Waterproofing Solutions for Metal Roofs in Austin, TX
Written By Cody Profitt
Waterproofing your roof is essential for protecting your home from leaks, water damage, and costly repairs—especially with Texas weather bringing everything from scorching sun to heavy rain. At Comanche Roofing, we help homeowners and businesses protect their properties with professional, long-lasting roof waterproofing services.
Here’s a step-by-step guide to help you understand the process:
Step 1: Inspect the Roof for Damage
Before applying any waterproofing treatment, it’s crucial to assess the current condition of your roof.
✅ Look for:
Missing or cracked shingles or tiles
Loose or rusted flashing
Clogged gutters or downspouts
Signs of leaks or moisture inside the attic
Fix all damage first to ensure the waterproofing material adheres properly and performs effectively
Step 2: Select the Right Waterproofing System
Different roof types require different solutions. Common waterproofing methods include:
Reinforced Bitumen Membranes (RBM)
Ideal for flat roofs; involves applying multi-layered bitumen sheets reinforced with fiberglass or polyester.Liquid Waterproofing Membranes
Flexible and seamless, this coating is suitable for flat and sloped roofs and adapts to roof movements.Cementitious Coatings
Best for concrete roofs, this mixture creates a strong, water-resistant barrier when applied in layers.Additional Options:
Sealants, elastomeric coatings, and roll roofing for targeted or budget-friendly waterproofing.
Step 3: Clean and Prepare the Roof Surface
Remove debris, dust, and old sealant to create a clean surface
Repair all problem areas including damaged shingles or tiles, and reseal flashing
Apply primer (if needed) based on the waterproofing material being used, to ensure proper adhesion
Step 4: Apply the Waterproofing Material
Follow the manufacturer’s instructions carefully, or hire a certified roofing contractor like Comanche Roofing to handle the installation.
Application Techniques:
RBM: Overlap sheets and seal edges using heat (torch-on) or cold adhesive
Liquid Membranes: Roll or spray evenly across the roof in multiple coats
Cementitious Coating: Brush or trowel on in layers, allowing full drying between coats
Step 5: Maintain and Protect Your Waterproofed Roof
Ongoing maintenance is key to long-term performance:
Keep gutters and downspouts clear
Inspect regularly for cracks, blistering, or damage
Consider adding reflective coatings or attic insulation to minimize UV and heat damage
Reapply waterproofing as recommended based on product life expectancy
Pro Tips for Roof Waterproofing in Texas
Professional Help: For larger, flat, or complex roofs, hire licensed roofers to avoid costly DIY mistakes.
Choose Materials Wisely: Make sure your waterproofing system can handle the Texas climate—heat, rain, and hail.
Safety First: Wear gloves, proper footwear, and use fall protection when working on your roof.
What is the best solution for metal roof waterproofing?
The best solution for metal roof waterproofing is applying a high-quality elastomeric or silicone roof coating. These coatings create a seamless, flexible barrier that seals small gaps, fastener points, and seams—preventing water intrusion and protecting against UV damage. For standing seam metal roofs, a silicone-based coating is especially effective due to its superior durability and ability to withstand ponding water. Before applying any coating, it’s important to clean the roof thoroughly and repair any damaged areas. For long-lasting results, always work with a professional Austin, TX roofing contractor to ensure proper preparation and application
Can I waterproof my roof myself?
Yes, but with caution. Homeowners can handle minor waterproofing tasks—like applying sealant or patching small areas—if the roof is easily accessible and in good condition. However, DIY waterproofing has its risks. Without the right products, tools, or experience, small mistakes can lead to bigger (and costlier) problems down the road.
Trust the Experts at Comanche Roofing
Still Having Roofing Issues?
If you’ve followed all the essential steps and you’re still seeing leaks, sagging, or signs of water damage, it may be time for something more serious—like a roof repair or full replacement.
Our experienced team will assess the damage, explain your options, and provide a long-term solution that protects your home and your wallet.
Call Comanche Roofing at (512) 796-9175 for a free estimate today.
We’re proud to serve Austin and surrounding areas with honest, reliable roofing you can count on.