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Back of a two-story house with white exterior walls and large glass sliding doors leading to the backyard. The upper floor has several windows, and there are two satellite antennas on the roof. The backyard has a small patio, some construction materials, and a wooden shed to the left. The sky is partly cloudy.

1950s Semi – Fishponds, Bristol

Graphite EPS External Wall Insulation + Silicone Render Finish

About This Project

This 1950s semi-detached home in Fishponds suffered from cold front rooms, high heat loss through uninsulated solid walls, and tired, cracked exterior render.
The client wanted to make the home warmer, reduce energy bills and update the appearance with a modern, clean finish.What We Did

We installed a 100mm Graphite EPS external wall insulation system, reinforced with a full mesh basecoat, and finished with a premium silicone render in a smooth white finish.

The project included:

  • Full removal of blown/cracked render

  • Substrate repair and preparation

  • EPS insulation installation

  • Mesh-reinforced basecoat

  • Silicone primer & silicone topcoat

  • New verge trims, beads, and detailing

  • Downpipe & service adjustments

  • Site protection and clean-up

Results

  • Warmer internal rooms with stable wall temperatures

  • Reduced heat loss, particularly on front elevation

  • Fresher, modern exterior appearance

  • Lower risk of condensation and mould

  • Significant improvement in thermal comfort during colder months

Materials Used

  • 100mm Graphite EPS insulation board

  • Full mesh reinforcement system

  • Silicone primer

  • Silicone topcoat (Colour: White)

Project Duration

8 days

System Type

Graphite EPS External Wall Insulation

  • Silicone Render Finish

Client Feedback

“MAINCO transformed our home completely. The house feels much warmer and the finish looks brilliant. The team were tidy, organised and kept us updated throughout.”

Side-by-side comparison of a house before and after renovation. The "Before" side shows an unfinished back wall with construction materials and a stairway, while the "After" side features a finished white wall with attached sliding glass doors, a small garden, and a red chair under a clear blue sky.
Construction scaffolding around a two-story house with white exterior walls, black doors and windows, on a cloudy day. Tools and ladders are on the ground, and a fence surrounds the yard.
Outside of a building with construction scaffolding set up around it, and a yellow safety barrier attached to the scaffolding.
Exterior view of a black double door with a glass window pane on the right side. The door is set in a white wall, with construction scaffolding visible at the top and on the sides.

About This Project

This residential property in Bristol had a newly constructed rear extension built with blockwork that required a high-performance external wall insulation system to improve thermal efficiency and achieve a clean, modern finish that matched the existing home.

The client wanted the extension to be warm, energy efficient and visually seamless, while ensuring long-term durability and weather protection.

What We Did

We installed a full external wall insulation (EWI) system to the new rear extension, creating a continuous insulated envelope and finishing the property with a crisp, modern appearance.

The system was designed to integrate neatly with existing elevations, openings, and drainage, ensuring both performance and aesthetics were addressed.

The Project Included

  • Inspection and preparation of new blockwork substrate

  • Installation of external wall insulation boards

  • Full mesh-reinforced basecoat system

  • Silicone primer and silicone render topcoat

  • Careful detailing around windows, doors and junctions

  • Adjustments to downpipes and services

  • Full site protection and clean-up

Results

  • Significantly improved thermal performance to the new extension

  • Reduced heat loss and improved internal comfort

  • Clean, modern render finish that blends with the existing property

  • Durable, low-maintenance exterior designed for long-term performance

  • A completed extension ready for internal fit-out and occupation

Materials Used

  • External wall insulation boards

  • Full mesh reinforcement system

  • Silicone render primer

  • Silicone render topcoat (White)

  • System trims, beads and fixings

Project Duration

[18 days]

System Type

External Wall Insulation System

  • Silicone Render Finish

Client Feedback

“MAINCO delivered exactly what we needed. The extension looks fantastic, and the finish ties in perfectly with the rest of the house. The team were professional, tidy and easy to work with throughout.”

Side-by-side comparison of a house before and after renovation. The 'before' shows the house under construction with scaffolding and building materials, while the 'after' shows the completed house with a white exterior, black window frames, and a finished backyard.
A backyard with a well-maintained green lawn, a garden hose, and a house with a mix of old and new construction, featuring large glass doors and windows, under a partly cloudy blue sky.

PROJECT: Full Exterior Transformation – Bristol

Mineral Wool External Wall Insulation + Silicone Render + Full Rear Extension Upgrade

About This Project

This property in Bristol was suffering from severe thermal loss, structural deterioration, and outdated exterior finishes.
The rear elevation had:

  • Rotten timber structures

  • Failed roofing over the ground-floor extension

  • Cracked and aged render

  • Significant cold bridging

  • Poor overall energy performance

The homeowner wanted to modernise the entire rear elevation, improve insulation, and create a warm, dry living environment.

What We Did

This was a full external transformation. Our team carried out:

✔ Structural repair & preparation

  • Removed all rotten timber elements

  • Stripped back failing render

  • Reinforced the existing extension structure

  • Repaired substrate and stabilised weak sections

✔ Installed External Wall Insulation (Mineral Wool)

Chosen for:

  • Breathability (ideal for older walls)

  • Fire safety

  • Moisture tolerance

✔ Full Silicone Render System

  • Mesh-reinforced basecoat

  • Primer

  • Smooth silicone topcoat in anthracite grey

✔ Extension Redesign & Modernisation

  • New façade layout

  • New window and door arrangement

  • Slimline modern sliding doors

  • Integrated shading/slat system

  • Proper waterproofing detailing

✔ Finishing Work

  • New guttering and downpipe layout

  • Trims, beads and corner protection

  • Full clean-down and finishing detailing

Materials Used

  • Mineral Wool insulation system

  • Mesh basecoat + reinforcing mesh

  • Silicone primer

  • Silicone topcoat (Anthracite Grey)

  • Aluminium finishing trims & detailing

  • Structural reinforcements (as required)

Project Duration

Approx. 6–8 weeks due to structural repairs + full façade works.

System Type

Mineral Wool EWI System

  • Silicone Render (Black)

Client Feedback

“The transformation is unbelievable. The house is warm, dry and looks like a completely new property. MAINCO were professional from start to finish.”

Comparison photo showing the backyard of a house before and after renovation. The "before" side shows a dirty, cluttered backyard with an unkempt exterior, while the "after" side shows a clean, landscaped backyard with a new modern facade and green lawn.
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