When it comes to roof leak repairs, choosing the right material can make the difference between a long-lasting solution and a temporary fix. While acrylic sealants and membranes (often referred to as the "pap and lap" method) are widely used for their ease of application and lower cost, they fall short in durability and performance. At Home Renovations and Repairs, we believe in doing the job right the first time, which is why we prefer steel flashings for sealing roofs.

Understanding the Two Methods

Acrylic sealants, often combined with a mesh membrane, are applied to cracks and joints to form a flexible waterproof layer. They’re quick to install and relatively inexpensive. However, they are prone to UV degradation, cracking over time, and often require regular maintenance.

On the other hand, steel flashings are custom-fitted metal sheets installed at joints, valleys, chimneys, and where roofs meet walls. They create a solid barrier against water ingress. Though more labour-intensive and costly upfront, steel flashings provide a long-term solution that aligns with NHBRC specifications.

Why Acrylic Sealants Fall Short

Many contractors opt for acrylic and membrane methods because they’re faster and cheaper. But fast doesn’t mean effective. This temporary solution often hides the real problem rather than fixing it. At Home Renovations and Repairs, we’ve seen how often clients call us after a previous repair using this method fails within a year or two.

Some common problems with acrylic sealants:

• They break down quickly under UV exposure
  
• They lose flexibility and crack
  
• They can trap moisture beneath, leading to rot and mould
  
• They do not meet NHBRC waterproofing standards

The Lasting Benefits of Steel Flashings

Steel flashings offer superior performance in almost every scenario. Here’s why they are the go-to choice for experienced professionals:

• Durability: Properly installed steel flashings can last decades without needing replacement.
  
• Weather resistance: They stand up to rain, wind, and sun far better than flexible coatings.
  
• Structural integration: Flashings are often part of the original roofing design and help maintain structural integrity.
  
• Low maintenance: Once installed, they need minimal upkeep.
  
• Professional appearance: They provide a neat and clean finish.

NHBRC Compliance

The NHBRC (National Home Builders Registration Council) sets strict guidelines for quality and durability in construction. According to their specs, steel flashings must be used where applicable, such as:

• Sidewalls
  
• Chimneys
  
• Valleys
  
• Parapets

Acrylic and membrane methods are not compliant as permanent solutions. Using steel flashings ensures your home meets national standards and avoids future headaches.

Real-World Experience

At Home Renovations and Repairs, we bring over 40 years of experience in roofing, structural repairs to roofs, and waterproofing. We’ve built thousands of roofs and repaired just as many. Our team never opts for shortcuts. Before we begin a roof leak repair, we conduct a full inspection to identify the root cause. Then, we remove damaged materials and use steel flashings where needed, not just apply a surface fix.

In many cases, a roof has leaked not because of missing tiles or sheeting, but because of poor flashing work. We’ve seen jobs where a small sidewall leak was patched with paint and membrane, only to leak again weeks later. When replaced with new steel flashings, the problem disappears for good.

Comparing Costs: Short-Term vs Long-Term

While acrylic sealants may seem cheaper upfront, they can lead to repeat repairs, water damage to interiors, and even structural repairs if moisture seeps into roof timbers or walls. In contrast, steel flashings might require a slightly higher initial investment but offer real cost savings over time.

Think of it this way:

• Acrylic sealants: R1,000 today + R1,000 next year + damage control = Expensive and frustrating
  
• Steel flashings: R3,000 today + nothing for the next 10 years = Peace of mind

Case Study: A Common Mistake

One homeowner contacted us after several attempts by other contractors to fix a leaking chimney with the "pap and lap" method. Every time it rained, water found its way in. We stripped off the membrane, cleaned the area, and installed custom-fitted steel flashings. It’s been three years now, and not a single drop has made its way inside.

Our Commitment to Quality

We follow a simple principle: do it once, do it properly. That’s why we are strict about using NHBRC-approved materials and methods. It’s not just about fixing a problem. It’s about restoring your roofing system to its original condition or better.

Our team is regularly trained, and we do not tolerate poor workmanship. Whether we’re doing general building, kitchen renovations, or waterproofing, quality is non-negotiable.

Final Thoughts

In the battle between steel flashings and acrylic sealants, there’s a clear winner. If you want a repair that lasts, choose a contractor who follows the correct methods and doesn’t take shortcuts. At Home Renovations and Repairs, we don’t patch problems—we solve them.

If you're experiencing roof leaks or need professional waterproofing, contact us today for a thorough inspection and expert advice. Call or email Home Renovations and Repairs now – your roof deserves the best.