Flush Sills & Stormwater Reticulation: Achieving Seamless Indoor-Outdoor Living

Feb 11, 2026

Architects and homeowners love the idea of a flush threshold, sliding doors that extend living spaces seamlessly from inside to outside.

But there’s always been one big problem: water.

In heavy rain, poorly designed flush sills often can’t cope, leading to leaks, damage, and expensive callbacks. That’s why many suppliers avoid offering true flush thresholds altogether.

At IKON, we’ve solved this.

How We Do It

Our flush sill systems are designed to integrate directly into stormwater reticulation. That means:

  • Rainwater is channelled into engineered drainage paths.
  • Water is collected and redirected into the building’s stormwater system.
  • You get a flush flow between inside and outside — without compromising waterproofing.

Why It Matters

  • Architects can finally design the clean, minimalist transitions they envision.
  • Homeowners enjoy indoor-outdoor living without worrying about leaks.
  • Builders & installers have confidence that performance won’t be sacrificed for looks.

This is more than a detail, it’s what separates a luxury system from a standard one.

The Future of Luxury Design

Indoor-outdoor living is a defining feature of high-end homes in Africa. With IKON’s flush sill technology, you don’t have to choose between aesthetics and performance, you get both.