External wall insulation

Looking for external wall insulation in the UK?
At Penguin BM, we supply complete EWI systems featuring graphite EPS boards, adhesives, mesh, and fixings. These solutions are ideal for improving thermal efficiency and reducing energy bills in UK properties.

Adhesive & Foam adhesive

Aggregates for hire

Facade profiles

Plastering tools

Polystyrene fiberglass mesh polystyrene fixing

Primers & Undercoats

Renders

Why Choose External Wall Insulation in the UK?

UK’s #1 External Wall Insulation Systems

Benefits of External Wall Insulation in the UK homes

External wall insulation offers multiple advantages that make it one of the most effective home improvement investments:

– Energy Efficiency: Reduce heating costs by up to 35% through improved thermal performance
– Eliminate Cold Spots: Maintain consistent temperatures throughout your home
– Prevent Condensation: Reduce the risk of damp and mould issues
– Noise Reduction: Improved sound insulation from outside disturbances
– Weather Protection: Additional barrier against rain and weather damage
– Enhanced Appearance: Refresh your property’s exterior with modern finishes
– Increased Property Value: Boost your home’s EPC rating and market value
– No Loss of Indoor Space: Unlike internal insulation, you don’t lose valuable living area
– Minimal Disruption: Installation takes place entirely from the outside provides year-round benefits, especially in UK homes, where temperature variation is high and energy bills are rising

At Penguin Building Materials, we offer complete external wall insulation systems designed for UK properties:

Insulation Boards

We offer high-quality expanded polystyrene (EPS) insulation boards that provide excellent thermal performance with great value. Our EPS boards are lightweight, easy to install, and provide reliable insulation for residential and commercial properties across the UK.

Mechanical Fixings

Our range includes specialist anchors and fixings designed to secure insulation boards to various substrates, including brick, block, concrete, and even timber-framed structures.

Base Coat & Reinforcement

The reinforcement mesh embedded in a polymer-modified base coat creates a durable, impact-resistant layer that protects your insulation and provides the foundation for your chosen finish.

External Renders

Silicone Renders (Tytan, Tynksil) – Premium quality with self-cleaning properties and excellent water repellency

Hybrid Renders (SISI) – Combining the best properties of silicone and silicate for enhanced durability
Quartz Renders – Exceptionally durable finish with natural stone appearance
Mosaic Renders (Lakma) – Decorative finish ideal for plinths, entrances and feature areas
Spray Silicone Renders – Easy application with professional spray equipment for larger projects

The External Wall Insulation Installation Process

Installing external wall insulation requires professional expertise to ensure optimal performance. The typical installation process includes:

Step 1: Initial Survey and Preparation

Professional assessment of the property
Measuring and calculating material requirements
Removing obstacles such as drainpipes and external fittings
Preparing wall surfaces for application

Step 2: Installation of Starter Tracks

Setting out and fixing aluminium starter tracks to establish a level base
Installing appropriate corner profiles for a clean finish

Step 3: Applying the Insulation Boards

Boards are fixed using a combination of specialized adhesive and mechanical fixings
Careful cutting and placement around windows, doors and other features
Ensuring boards are perfectly aligned with minimal gaps

Step 4: Reinforcement Layer

Application of base coat reinforced with alkali-resistant fibreglass mesh
Additional corner reinforcement around openings to prevent cracking
Creating proper connections with window sills and other building elements

Step 5: Finishing

Application of primer preparation
Applying the chosen render or finish system
Installation of windowsill extensions and other architectural details
Reinstallation of rainwater goods and external fittings.

When professionally installed, external wall insulation systems typically last 25+ years with minimal maintenance, providing long-term energy savings and comfort improvements.

How Much Does External Wall Insulation Cost in the UK?

The cost of external wall insulation in the UK depends on property size, insulation thickness, and chosen materials. Penguin BM offers affordable, high-performance graphite EPS boards and complete EWI systems with nationwide delivery.

External Wall Insulation: Costs and Savings

While external wall insulation represents a significant investment in your property, the long-term benefits and savings make it a cost-effective improvement.

Initial Investment:

Average cost for a typical semi-detached house: £8,000-£15,000
Factors affecting cost: Property size and accessibility, Chosen insulation type and thickness, Selected finishing system, Necessary additional works (e.g., extending rooflines, relocating services)

Long-Term Savings:

Energy bill reduction: Up to £530 per year for a typical semi-detached house
Reduced maintenance costs due to weather protection
Potential property value increase: 5-10%

Financial Support Options:

ECO Scheme funding for eligible households
Green Homes Grant Local Authority Delivery scheme
Home Energy Scotland loans (for Scottish properties)
Local council grants (varies by region)

Return on Investment:
External wall insulation typically pays for itself within 10-15 years through energy savings alone, while providing immediate comfort benefits and reducing your carbon footprint by approximately 1.8 tonnes of CO₂ per year.

Contact our team for a detailed assessment and quote specific to your property.

Explore our full range of external wall insulation UK products, including graphite EPS boards, adhesives, mesh and more – all with fast UK-wide delivery.

For more information on ECO funding and energy efficiency standards in the UK, visit the UK Government ECO Scheme page.

External Wall Insulation vs Other Insulation Methods

Choosing the right insulation method is essential for improving energy efficiency and comfort. Below is a comparison of external wall insulation UK systems versus internal and cavity wall insulation – helping you decide which option best fits your home or project.

Feature	External Wall Insulation	Internal Insulation	Cavity Wall Insulation
Energy Efficiency	⭐⭐⭐⭐⭐	⭐⭐⭐	⭐⭐
Preserves Floor Space	✅	❌	✅
External Appearance	✅ (Modern Finish)	✅	✅
Cost	£££	££	£
Disruption During Installation	Low	High	Minimal
Best for	Solid Walls (UK homes)	Small Flats, Listed Properties	Houses with cavity walls

Frequently Asked Questions About External Wall Insulation

Is my property suitable for external wall insulation?

Most properties with solid walls or cavity walls that are unsuitable for cavity filling are excellent candidates for external wall insulation. However, listed buildings or those in conservation areas may have restrictions. Our experts can assess your property and advise on suitability.

Do I need planning permission for external wall insulation?

In most cases, external wall insulation is considered permitted development and doesn’t require planning permission. However, if your property is listed, in a conservation area, or the installation will substantially change the appearance, permission may be required. We can provide guidance specific to your situation.

How long does external wall insulation installation take?

A typical semi-detached house usually takes 2-3 weeks to complete, depending on weather conditions and property complexity. Our installation teams work efficiently to minimize disruption.

How thick is the insulation?

The total system thickness typically ranges from 60mm to 150mm, depending on the insulation material chosen and the level of thermal performance required. This includes the insulation board, reinforcement layer, and finishing coat.

Will external wall insulation cause damp or condensation?

Properly installed external wall insulation should reduce, not increase, condensation problems. The system includes vapour-permeable components that allow the building to “breathe” while preventing moisture ingress.

What maintenance is required?

External wall insulation systems require minimal maintenance. Periodic cleaning with a gentle pressure wash or soft brush is recommended. Most systems have a life expectancy of 25+ years before any significant maintenance is needed.

Can external wall insulation be applied in winter?

Installation is possible throughout the year, though certain weather conditions (heavy rain, strong winds, or temperatures below 5°C) may temporarily halt work, particularly during the application of renders and finishes.

Will external wall insulation affect my home's appearance?

External wall insulation will change your property’s external appearance, but this is typically seen as an improvement. Our wide range of finishes allows you to maintain character features or completely transform your home’s look.

Is external wall insulation a good choice for UK homes?

Yes! External wall insulation is an ideal solution for many UK properties, especially those with solid brick walls or poor energy ratings.

Why Choose Penguins Building Supplies for Externall Wall Insulation?

As a trusted external wall insulation UK supplier, Penguin BM provides:

Comprehensive Product Range

Complete EWI system components from leading manufacturers
Latest insulation innovations and specifications
Professional-grade tools and application equipment
Technical accessories and installation consumables

Expert Technical Support

Qualified EWI technical advisors
System design assistance and U-value calculations
Installation guidance and troubleshooting support
Project-specific insulation recommendations

Competitive Trade Pricing

Volume discounts for contractors and installers
Competitive pricing on complete EWI systems
Flexible payment terms for trade customers
Next-day delivery across the UK

Professional Service Standards

Certified external wall insulation product knowledge
Reliable stock availability of all system components
Efficient order processing and project coordination
Comprehensive customer support throughout installation

Contact our external wall insulation specialists today to discuss your EWI requirements and discover why leading contractors choose Penguins Building Supplies for their external wall insulation projects.

Email: info@penguinbm.com
Phone: 075 1528 3453
Phone: 074 2438 1423
Phone: 020 8991 9590

416 Ealing Rd, London, Wembley HA0 1JQ, United Kingdom

Mon–Fri 7:00 AM – 4:00 PM
Sat 7:00 AM – 1:00 PM
Sun Closed