EPS External Wall Insulation

Jablite graphite boards are designed to be fixed to the outside face of external walls and finished with a reinforced render system. Their job is to reduce heat loss through solid or masonry walls while providing a stable base for render.

What Are Jablite EPS External Wall Insulation Boards?

Jablite external wall insulation boards are rigid EPS panels made from expanded polystyrene beads and graphite particles. The beads are expanded and fused together using steam to form a lightweight but stable insulation board.

The added graphite reflects and absorbs radiant heat within the board. This slows heat movement more effectively than standard EPS, resulting in better thermal performance at the same thickness.

When installed as part of a rendered EWI system, these boards sit on the outside of the wall, are mechanically fixed and bonded, then covered with a mesh‑reinforced basecoat and a decorative render finish.

What Are Graphite EPS EWI Boards Used For?

Jablite graphite boards are used for external wall insulation with render finishes, mainly in:

• Solid brick or stone houses with no cavity
• Older masonry buildings with poor thermal performance
• Retrofit projects where internal insulation would reduce room space
• Refurbishments where the external appearance is being upgraded with render

Jablite is designed to work as part of a full EWI render system. This typically includes:

• Adhesive and mechanical fixings
• Graphite EPS insulation boards
• Reinforcement mesh
• Basecoat
• Decorative render finish

Expanded polystyrene outdoor insulation boards should not be left exposed – render protects the insulation from UV light, impact, and weather.

When fully rendered, graphite EPS allows controlled vapour movement while preventing bulk water ingress. This ensures durability throughout the system’s life.

Benefits of Graphite‑Enhanced EPS for Rendered EWI

Graphite EPS is chosen specifically for rendered external wall systems because it offers a practical balance of performance, weight, and compatibility with render.

Key advantages of using Jablite include:

• Improved thermal resistance compared to standard EPS
• Lightweight boards that are easy to handle and fix at height
• Stable surface suitable for mesh and render build‑ups
• Proven long‑term performance when protected by render

Because the boards are lightweight, they place minimal load on existing walls while still delivering strong insulation performance.

Why Choose Our Jablite Graphite EWI Boards?

Here is why trades and builders choose Jablite exterior EPS polystyrene from Insulation Wholesale:

• We provide genuine Jablite EPS, which remains dimensionally stable for decades and resists moisture. Like all EPS, it must be protected from prolonged UV exposure to prevent surface degradation and ensure reliable render adhesion.
• We carry a flexible range of Jablite external expanded polystyrene thicknesses UK installers rely on for dependable insulation performance.
• Our selection includes Jablite exterior EPS sheets UK customers use for both small render upgrades and full external wall systems.
• Our competitively priced Jablite EPS boards provide excellent value for money.

FAQ

Where can I buy Jablite graphite external wall insulation?

You can order Jablite graphite EPS exterior polystyrene insulation boards online directly from Insulation Wholesale. We stock this range in multiple thicknesses suited for rendered EWI systems. Get a fast quote and enjoy a discounted exterior EPS price, with prompt delivery across the UK.

Can graphite EPS boards be exposed to moisture and UV?

Graphite EPS boards are highly resistant to moisture and do not readily absorb water. However, they are not waterproof and must be installed as part of a complete render system. Such a system also shields them from UV damage. Prolonged UV exposure can affect the board’s surface, which is why they should be rendered promptly after installation.

Why does graphite EPS insulate better than standard EPS?

The graphite particles reduce radiant heat transfer within the board. This improves thermal resistance without changing the basic EPS structure.

How are Jablite graphite boards cut on site?

Graphite-enhanced exterior foamed polystyrene boards can be cut with a sharp knife or fine‑tooth saw. For cleaner edges, especially at higher thicknesses, a hot‑wire or hot‑knife cutter is often used.

Buy the Jablite outdoor EPS board for render from Insulation Wholesale, with reliable UK delivery and expert support to help you choose the correct thickness for your EWI project.