Internal Wall Insulation for Solid Brick London Homes

We assess heat loss properly and design insulation systems that improve warmth, efficiency and long-term building health — backed by a 20-year system guarantee.
• Survey-led design
• Moisture-safe systems
• Clean installation
• London-wide
Solid wall insulation specialists
Accurate technical serveys
Long term energy efficiency solutions
Cold Walls Are a Performance Issue — Not Just Discomfort

Many London properties, particularly solid brick homes and period flats, lose significant heat through external walls. This often leads to cold surfaces, condensation formation and increased heating costs.

Walls feel cold even with heating on
Rooms are difficult to stabilise
High heating bills
Condensation forming on colder surfaces
Mould appearing on external walls
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Designed for Solid Wall Properties
We specialise in internal wall insulation systems tailored specifically to London’s solid masonry buildings. Every recommendation is based on survey findings — not assumptions.
Expert Survey & Moisture Risk Assessment
We evaluate heat loss patterns and moisture risk before any design work.
Tailored Insulation System Design
Insulation solutions engineered specifically for your property’s construction and conditions.
Long-Term Thermal Performance & Protection
Installed to maintain warmth, reduce energy bills and minimise condensation risk over time.
A Structured Approach
Survey & Analysis
Heat-loss patterns identified and moisture risk assessed.
Step 01
System Design
Appropriate insulation thickness and control layers specified.
Step 02
Professional Installation
Controlled, tidy work with clear staging.
Step 03
Handover
Care guidance and performance expectations explained.
Step 04
Why Sashtec Is Different
Specialist focus on insulation & moisture control
Designed specifically for solid wall London homes
Clear, staged quotations
Dust-controlled installation
20-year system guarantee
Common Questions About Wall Insulation