Project Overview
Client: Private Homeowner (Confidential)
Location: North London
Sector: Residential
Service Type: External Wall Insulation (EWI) & Silicone Rendering
Duration: 6–8 weeks
Completion Date: October 2025
Project Objectives
- Improve thermal performance and reduce energy loss through external walls
- Apply a high-quality, long-lasting silicone render finish
- Protect the property against moisture penetration and weather impact
- Modernise the appearance of the exterior with clean and uniform surfaces
- Ensure the installation meets PAS 2030/2035 retrofit standards
Scope of Works
1. Preparation & Demolition
- Removal of old render, loose materials, and outdated pipe brackets
- Surface cleaning and pre-inspection for substrate integrity
- Installation of scaffolding to provide full access around the property
2. External Wall Insulation Installation
- Application of EPS insulation boards across all exterior walls
- Mechanical + adhesive fixing for maximum stability
- Installation of corner beads, mesh reinforcement, and basecoat layer
3. Silicone Render System
- High-performance breathable silicone render applied to all elevations
- Fine-texture finish for a modern, clean aesthetic
- UV-resistant, waterproof, and self-cleaning surface
4. Pipeworks & Services Integration
- Repositioning and re-fixing of waste pipes, downpipes, and utilities
- Sealing around protrusions to ensure weather-tight installation
- New brackets added to support pipe alignment after rendering
5. Finishing & Detailing
- Rendered reveals around all windows for a premium look
- Reinforced base protection at ground level
- Clean transitions at joins, corners, and service penetrations
Challenges & Solutions
Challenge 1 – Very Narrow Side Access
Scaffolding placement was difficult due to the tight gap between properties.
Solution:
Our team installed a specialised narrow-access scaffold structure with precise spacing, ensuring safe working conditions without disturbing neighbouring structures.
Challenge 2 – Complex Pipework Layout
Multiple waste pipes and old conduits interfered with insulation placement.
Solution:
We temporarily removed unnecessary pipe brackets and reconfigured pipe runs. All penetrations were fully sealed and reinforced to maintain insulation continuity.
Challenge 3 – Uneven Substrate
Existing exterior walls showed inconsistencies and minor structural deviations.
Solution:
We applied levelling compounds and mesh reinforcement to stabilise surfaces before applying insulation and basecoat. This guaranteed a smooth, uniform render finish.
Results
- Full thermal upgrade of the building envelope, significantly reducing heat loss
- Clean, modern exterior with a durable silicone finish
- Enhanced weather resistance and moisture protection
- Improved airtightness and energy efficiency
- Property façade transformed into a bright, uniform, premium-looking exterior
- Increased property value and long-term durability
Client Testimonial
“The exterior looks completely transformed. Bigness delivered high-quality work with excellent attention to detail. The insulation has already made the home feel warmer.”
Key Takeaways
- Silicone render systems offer long-term durability, weather resistance, and a clean aesthetic
- High-quality EWI significantly boosts energy efficiency and reduces heating costs
- Proper detailing around pipes, windows, and corners is essential for a professional finish
- Narrow-access projects require experienced teams with specialist scaffold solutions
Project Gallery
