Silicone Rendering & EWI in London
Silicone Rendering & External Wall Insulation in London
Transform the look of your home and slash your heating bills with expert silicone rendering and external wall insulation (EWI) in London from IMD Building Services. With over 10 years' experience and a 4.8 rating from 52 local customers, we wrap your property in high-performance insulation and finish it in a smooth, self-cleaning silicone render available in a wide range of colours. From a tired brick facade to a modern, weatherproofed and better-insulated home, we manage the whole project in-house - insulation, beading, basecoat, mesh and topcoat - from the first survey to the final finish.
Our Silicone Rendering & EWI Services in London
Whether you want to insulate and re-clad your whole house or simply refresh tired render, we offer a complete external wall insulation and silicone rendering service - one team, one point of responsibility, from survey to finished facade.
External Wall Insulation (EWI) Systems
Full EWI systems that wrap your home in insulation boards and finish in silicone render - a warmer, more energy-efficient home with a brand-new look and no internal disruption.
Silicone Thin-Coat Render
Modern silicone thin-coat render that is breathable, water-repellent and self-cleaning, for a crack-resistant finish that keeps its colour and stays looking fresh for years.
Render-Only & Re-Rendering
Already insulated, or just want to modernise the finish? We re-render over sound existing walls and replace tired, cracked or discoloured render with a fresh silicone system.
Insulation Board Options
Graphite EPS and other insulation boards in a range of thicknesses to suit your property and the level of thermal performance you are aiming for.
Colours & Finishes
A huge palette of render colours and grain finishes, so you can match neighbouring homes or give your property a completely fresh, contemporary look.
Full Property Transformations
Combine rendering with our brickwork and plastering services for a complete exterior and interior transformation, all handled by one team.
Materials We Use
A render system is only as good as the products and the detailing behind it. We use quality, system-matched materials so the finished facade performs and lasts:
EWI Pro EWI-075 Silicone Render
A premium silicone topcoat that is highly water-repellent yet breathable, flexible and self-cleaning. It resists cracking, algae and dirt, and comes in a wide colour range including Almond, Ivory, Sandstone and Pure White.
Graphite EPS Insulation Boards
High-performance graphite EPS insulation boards (commonly 70mm and up) fixed to the wall to dramatically improve thermal efficiency - the core of any external wall insulation system.
Basecoat & Fibreglass Mesh
A polymer-modified adhesive basecoat with an embedded alkali-resistant fibreglass mesh - the reinforced layer that gives the render its strength and crack resistance.
Primer, Beads & Fixings
Silicone primer, uPVC corner and starter beads, verge and window trims, plus mechanical fixings - the detailing that makes an EWI system weathertight and neat at every edge.
Popular render colours
- Pure White
- Almond
- Ivory
- Magnolia
- Sandstone
- Bone
- Silk
- Sage
- Platinum
- Silver
- Storm
- Truffle
These are just a few of the options - we will bring the full colour chart to your survey so you can choose the perfect shade for your home.
Areas We Cover Across London
We are based in East Ham (E6) and regularly render and insulate homes throughout East London and the surrounding boroughs, including Newham, Barking & Dagenham, Stratford, Ilford, Romford, Walthamstow, Leyton and Forest Gate, as well as Central London on larger projects. If you are not sure whether we cover your postcode, just ask - we are always happy to confirm before you commit to anything.
How Much Does Silicone Rendering & EWI Cost in London?
Costs depend on the size of the property, the amount of scaffolding and detailing, and whether you are adding insulation or rendering only. London rates sit above the national average. The figures below are typical market ranges to help you budget - a guide only, not a fixed quote:
- Silicone render only (re-render): roughly £40-£80 per m², depending on preparation and access.
- Full external wall insulation + silicone render: typically £100-£150 per m² for a complete EWI system.
- Whole terraced or semi-detached house (full EWI): generally £8,000-£20,000+ depending on size and detailing.
- Render-only for a whole house: usually £4,000-£10,000+.
Scaffolding, intricate detailing and difficult access add to the cost. We never quote off the top of our head - we survey the property, measure up, then give you a clear, fixed written quote with no hidden costs before any work begins.
Our Silicone Rendering Process - Step by Step
Here is a real London project we completed, from bare brick to a fully insulated and rendered finish. Every stage is done properly, because a render system only performs if the layers beneath it are right.
1Survey & preparation
We assess the property, set up scaffolding and carefully protect windows, doors and surrounding areas before any work starts.
2Fixing the insulation
Old finishes are removed where needed and the insulation boards are bonded to the wall, working up from a level starter track.
3Boards installed
The graphite EPS boards are fitted tight across the whole elevation and mechanically fixed, fully wrapping the home in insulation.
4Basecoat & mesh
A polymer basecoat is applied and the alkali-resistant fibreglass mesh is embedded into it to reinforce the system against cracking.
5Reinforce & prime
Fixings are set, the basecoat is left to cure and the surface is primed, creating the perfect, even base for the silicone topcoat.
6Silicone render finish
The silicone topcoat is applied and floated to a consistent grain, leaving a clean, modern, self-cleaning finish that transforms the home.
The Same Transformation - Rear of the Property
The rear elevation of the same London home, taken through the same stages - bare brick, insulation boards, and the finished silicone render.
1Before
The original brickwork at the rear, with windows masked and scaffolding in place ready to begin.
2Insulated
The rear elevation fully boarded out in graphite EPS insulation, ready for the reinforced basecoat.
3Rendered
The finished silicone render going on at the rear - a crisp, clean, weatherproof finish to match the front.
Why Choose Silicone Rendering & EWI
External wall insulation with a silicone render finish is one of the best upgrades you can make to an older London home. Here is why homeowners choose it - and why they choose us:
- A warmer home and lower heating bills all year round
- Breathable, water-repellent, self-cleaning silicone finish
- Crack-resistant, reinforced render system
- Transforms tired brick or pebbledash into a modern facade
- No internal disruption - all work is done from outside
- Over 10 years' experience and a 4.8 rating from 52 reviews
- One team for the whole system, fixed written quotes
- Local to E6 and easy to reach before, during and after the job
Frequently Asked Questions
What is silicone render and why is it a good choice?
Silicone render is a modern, thin-coat through-coloured finish that is highly water-repellent yet breathable, so walls can dry out while staying protected from rain. It is flexible and crack-resistant, self-cleaning, and holds its colour well, which makes it low-maintenance and long-lasting compared with older cement renders.
What is external wall insulation and what are the benefits?
External wall insulation (EWI) fixes insulation boards to the outside of your walls and finishes them in render. It makes your home warmer and cheaper to heat, protects the walls from the weather, reduces condensation and completely transforms the exterior - all without losing any internal space or disrupting the inside of your home.
Do I need planning permission for external wall insulation?
For most houses, adding external wall insulation is permitted development and does not need planning permission, provided the appearance is broadly in keeping. Flats, maisonettes, listed buildings and conservation areas can be different. We will advise you on what your property needs as part of the survey.
How long does a silicone rendering or EWI project take?
Most whole-house projects take around two to four weeks depending on the size of the property, the amount of detailing and the weather, as render needs suitable conditions to cure. We agree a realistic timeframe with you in writing before we start and keep you updated throughout.
Do you provide a written quote and a guarantee?
Yes. After a free survey we provide a fixed, itemised written quote, and our workmanship is guaranteed. To get started, call us on 01375 404498 or request a free survey online.
Ready When You Are
Transform Your Home with Silicone Rendering
Tell us about your property and we will arrange a free, no-obligation survey at a time that suits you. Honest advice, a fixed written quote and a warmer, better-looking home.
