Solid-wall and pre-1920s homes lose heat through their walls. Smart Renda installs external wall insulation for London homes with a real survey, a clear written quote, and no high-pressure sales, so you know exactly what is happening before work starts.
Older solid-wall homes can be hard to diagnose from the inside. These are the issues we look for before recommending any insulation or render system.
Walls feel cold to touch, rooms heat slowly, and comfort drops quickly when the heating goes off.
Cold external walls can create condensation spots, especially in corners and behind furniture.
Heating runs longer because solid walls are a major heat-loss route in older homes.
Different contractors price different systems, details, and scaffolding, so like-for-like comparison becomes difficult.
EWI is a continuous insulating layer fitted to the outside of the home, then finished with a weatherproof render or board system. It keeps the masonry warmer, reduces heat loss through solid walls, and can improve the exterior finish at the same time.
Because the insulation sits outside, internal rooms keep their floor area. The important work is in the detailing around windows, sills, eaves, services, and damp courses.
EPS or mineral wool boards are bonded and mechanically fixed to the existing brick, stone, or block wall outside the home.
A reinforced base coat with mesh is detailed around windows, sills, eaves, services, and damp courses, where performance is often won or lost.
Silicone, mineral, or acrylic render, or an appropriate board or brick-slip finish, protects the system and refreshes the exterior.
External wall insulation is usually most suitable for older solid-wall homes, including many Victorian, Edwardian, and pre-1920s properties. These homes often do not have a cavity wall, so heat escapes directly through the brick or masonry.
A proper survey checks wall condition, damp issues, access, planning context, window details, services, and the most suitable insulation and render system before any quote is given.
Often found in older London properties without a cavity to insulate.
Useful where external walls feel cold, rooms heat slowly, or bills keep rising.
Can combine insulation with a fresh weatherproof render finish.
Needs careful assessment first. EWI can help with cold-spot condensation, but it is not a shortcut over unresolved leaks or structural damp.
We don't promise specific savings — every property and household is different. What we can describe is what almost every customer feels after a properly specified job.
Walls hold heat instead of pulling it out. Rooms reach temperature faster and stay there longer.
Solid walls are a major heat-loss path on older homes. EWI directly addresses it (Energy Saving Trust).
Many damp patches are caused by warm air condensing on cold walls. Warm walls = fewer cold spots.
A new render finish in a colour and texture you choose — your home looks well-kept again.
An added insulation layer also dampens road and street noise, particularly on bay walls.
Protects masonry from driving rain and weather cycles. The wall behind is doing less work.
Source on heat loss through solid walls: Energy Saving Trust guidance on solid-wall insulation (energysavingtrust.org.uk). We don't quote specific £ savings — your surveyor will explain what results are realistic for your property.
Every project follows the same path, from a real surveyor's visit through to final inspection. You know what is being assessed, what is included, and what happens next.
A real surveyor, not call-centre sales, visits to measure up and understand what is happening with the property.
Wall build-up, exposure, damp risks, planning context, access, photos, and notes are recorded.
You receive an itemised quote covering scope, system, render type, detailing, scaffolding, and payment stages.
Scaffolding, access, protection, and services are explained before work starts.
Boards, reinforcing mesh, render, and details are installed with a daily clean-down.
Final inspection, sign-off, warranty paperwork, and aftercare are handled before completion.
Smart Renda is operated by Smart Building Solutions Ltd and built on practical experience in refurbishment, external finishes, property improvement, and solid-wall homes. We focus on proper assessment before recommending an EWI system, because the details around windows, sills, eaves, damp courses, services, and scaffolding often decide whether a job performs well.
Smart Building Solutions Ltd, trading as Smart Renda. Companies House number 10973020.
Every quote spells out the system, render type, mesh, beads, scaffolding, detailing, and payment stages.
A surveyor explains what is possible, what needs checking, and when EWI may not be the right recommendation.
Scaffolding, access, service moves, window details, and protection are discussed before work starts.
Brick, stone, render-on-block, and older wall build-ups need careful specification. We say no when EWI is wrong for the property.
Anyone giving you a price over the phone is guessing. Real EWI pricing depends on a handful of measurable things — and a survey is the only honest way to put a number on them.
Smart Renda works across London and surrounding areas, focusing on older solid-wall homes, Victorian terraces, Edwardian houses, semi-detached properties, and exterior refurbishments where proper detailing matters.
Fill in the essentials and we'll be in touch within one working day to pick a survey time that suits you. If you'd rather just chat first, you can call us on 07884 425210.