APEXEWIEXTERNAL INSULATION & RENDER
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EWI — Eltham

Completed

EWI
Eltham

This project delivered a full-house EWI wrap to a semi-detached home in Eltham, London. Mineral wool insulation fitted across the main property, finished in a grey silicone render top coat, with a further render-only finish applied to the rear extension to match. The transformation was completed with a full roofline refresh — brand new fascias, soffits, gutters, and downpipes fitted to the front, side, and rear — for a cohesive, energy-efficient, and fully refreshed exterior.

location_onEltham, LondonfoundationCavity Wall2026
EWI — Eltham

Floor Area

145

Duration

17

U-Value

0.30W/m²K

Team Size

2Installers

Warranty

10-Year Manufacturer Warranty

02 · Section

Spec Sheet

System build-up as installed — materials, fixings, and finish as signed off on completion.

Materials & SpecificationverifiedCompleted
Grain Size
1.5mm
Colour

Smoke

Code 27416 · EWI Pro Silicone

Warranty
10-Year Manufacturer Warranty
Access
Full Scaffold
U Value
0.30 W/m²K
Area
145m²
Silicone Render
Silicone Render (EWI-075) – 25KG
Basecoat
Premium Basecoat (EWI-225) - 25kg + Aquabase (EWI-226) - 25kg
Primer
Universal Primer (EWI-310) - 20kg + Top Coat Primer (EWI-333) - 20kg
Corner Bead
uPVC Render Corner Bead - No Nose (2.5m)
Stop Bead
uPVC Stop Bead with Mesh (2.5m)
Reveal Bead
Window Reveal Bead with Protective Lip & Mesh – White (6mm) – 2.6m
Oversill
White Aluminium Oversill (2.5m) + White Aluminium Oversill End Caps (Pair)
Mesh
Orange Fibreglass Mesh (165g/m²) - 50m²
Insulation Board
Rockwool - External Wall Insulation Dual Density Slab + XPS Insulation (1 board)
Insulation Fixing
10mm Hammer Fixing with Plastic Pin
Starter Track
Aluminium Starter Track (2.5m) + Base Connectors - 30mm + 6mm Clip-on Profile for Starter Track (2.5m)
Roofline Closure
Lynvale - Expanding Foam Tape - 5.6m (15mm)

04 · Get quote

Start your own transformation.

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EWI — Eltham | Projects