🧱 External Insulation Installation – High-Performance Warmth with Safety at the Core
At DSN+BD Construction, we believe energy efficiency and fire safety should go hand in hand. That’s why our latest external insulation installation combines premium thermal performance with best-in-class protective detailing — all tailored to suit the unique demands of this build.
We’ve just completed the installation of 100mm Celotex GA 4000 insulation as part of the external wall build-up, and it’s already making a big impact.
🌡️ Thermal Performance That Delivers
The Celotex GA 4000 is a high-performance Polyisocyanurate (PIR) board known for its excellent thermal insulation properties. With this installation, we’ve achieved a U-value of 0.17 W/m²K — a significant step toward lowering heating demand and improving year-round comfort.
Key Benefits:
✅ Reduces energy bills by improving thermal resistance
✅ Creates a consistent internal temperature through all seasons
✅ Lightweight and easy to fix without compromising performance
✅ Ideal for residential retrofits and new builds alike
It’s a smart, efficient choice that forms the backbone of a well-insulated, high-performing home.
🔥 Fire Protection Where It Matters
While Celotex GA 4000 excels in thermal efficiency, it is also a combustible material. That’s why we’ve taken proactive steps to address fire safety — installing a Class B-s1,d0 rated breather membrane over the entire insulated surface.
We’ve used Novia’s UV Facade FR Breather Membrane, which:
🔥 Meets fire-resistant standards
🌬️ Maintains full breathability to protect the wall build-up
☀️ Is UV-stable, making it suitable for open-jointed facades and exposed detailing
This ensures the insulation layer remains protected from flame spread while still allowing any internal moisture to escape — keeping the structure dry and safe.
🔒 Airtightness You Can Trust
To ensure the whole system performs as one continuous, protected envelope, we’ve sealed all junctions with Novia Ultraviolet Lap Tape (UVLT). This guarantees:
🛑 Airtight joints
💧 Water ingress prevention
🔒 Enhanced membrane durability and lifespan
Combined, this system provides thermal efficiency, moisture protection, and fire safety — all in one carefully layered solution.
🧠 Design-Led Detailing, Build-Informed Delivery
As a design-led design and build company, we consider every layer from the earliest stages of the project. This insulation and membrane combination is more than a technical requirement — it’s an integral part of the building’s comfort, compliance, and long-term performance.
From accurate fixing methods to smart sequencing, we ensure that every component works with the next — keeping your home warm, protected, and future-ready.
🏡 Built for Warmth, Designed for Safety
With the Celotex insulation and Novia membrane system now in place, this project is moving forward with confidence — combining the best of modern insulation with fire-conscious detailing and airtight installation.
It’s proof that smart building isn’t just about what you see — it’s about how each layer works behind the scenes.
Planning a renovation or energy-efficient new build? We design and install complete insulation systems that protect your home from the elements — and meet the latest in thermal and fire performance standards.
📩 Get in touch to discuss your insulation goals with the DSN+BD team.