Exterior Wall Coatings & Silicone Render

Why Exterior Protection Matters

Your home's exterior walls are its first line of defence against the weather. Colchester sits in one of the driest parts of the UK, but when rain does arrive, the coastal influence means it often comes as driving, horizontal rain — the hardest type for walls to resist.

Over time, brickwork and mortar become porous. Render cracks. Surfaces that once shed water now absorb it. The result is penetrating damp inside the property and accelerated deterioration of the wall structure. A quality exterior treatment puts a stop to this cycle.

The Problem with Cracked Render

Cracked render is one of the most common routes for penetrating damp in Essex properties. Once water gets behind cracked render, it's trapped — it can't evaporate because the outer surface is largely intact, so it soaks straight through the wall.

The answer is not to patch or overpaint cracked render. It needs to be removed and replaced with a flexible, modern silicone render system that won't crack with normal building movement.

Signs Your Exterior Walls Need Treatment

• Porous brickwork or render that absorbs water after rainfall
• Green algae or moss growth on exterior walls
• Damp patches appearing on interior walls after heavy rain
• Cracked, crumbling, or blowing render
• Tired, faded, or stained exterior walls
• High heating bills due to poorly insulated or exposed walls

Exterior Wall Coatings

An exterior masonry coating is a thick, flexible, waterproof paint applied directly to brick, stone, or existing render. It forms a continuous waterproof membrane across the wall surface while remaining breathable — allowing water vapour from inside the property to pass through outwards.

• Waterproof barrier that repels water without trapping moisture in the wall
• Breathable — allows water vapour to escape from inside the property
• Prevents penetrating damp, algae growth, and frost damage
• Extends the life of your brickwork and masonry significantly
• Improves the visual appearance of the exterior
• Applied without disruption — no scaffolding in most cases
• Typically guaranteed for 20+ years

Silicone Render

Silicone render is a modern, through-colour render system applied over the existing wall surface. Unlike traditional sand-and-cement render, silicone render is highly flexible — it moves with the building without cracking — and is inherently water-repellent throughout its thickness, not just at the surface.

• Seamless, durable finish that eliminates cracked render as a water entry point
• Highly flexible — accommodates natural movement without cracking
• Excellent thermal performance — helps retain heat in the property
• Wide range of colours and textures available
• Low maintenance — does not require repainting
• Professional, modern finish that enhances kerb appeal and property value