Seal the Envelope | Mapei UK

Seal the Envelope, Futureproof the Home.

Your partner for innovative building envelop solutions, integrating the specialist expertise of Wykamol and Polyglass to support energy efficiency, performance upgrades, and full compliance under EC04.

Seal the envelope

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ECO4 Delivery Guidance

Seal the Envelope House (002)

Stronger Together: Built on Mapei. Strengthened by Wkyamol and Polyglass.

As part of the mapei group, both Wykamol and Polyglass bring decades of expertise in structural waterproofing, including gas protection, roofing, and thermal performance. Their combined knowledge enables Mapei to deliver integrated system solutions designed for energy-efficient refurbishment and compliant building protection.

Seal The Envelope 1

Seal The Envelope 2

Aligned with ECO4 and Warm Homes: Systems Designed for Retrofit Success.

Our solutions meet the evolving requirements of EC04 and other government-funded retrofit schemes,such as Warm Homes. We support applicants and coordinators with robust, evidence-led documentation and clear system configurations.
Social Housing Decarbonization Fund (SHDF), as ECO 4.

Warm Homes Local Grant – Official Guidance

ECO4 New Measures and Products

Delivering with Confidence
What Our Systems Deliver Grid Format.

Energy efficiency: reduce heat loss and improve space heating performance
Moisture & Damp Protection: Long-lasting solutions for internal and external wall defence.
Verified Compliance: Aligned with EC04, PAS 2035, and TrustMark frameworks.
Technical Support: Installation guidance,documentation,and coordinator templates
(+1 expected addition: Internal wall protection such as the Isotherm system. Technical content needs)

Our Product Lines

External wall insulation (EWI)

Waterproofing products

System Build-Ups: Complete EC04 Compliant Solutions

We are developing full system build-ups for common applications, from external wall insulation to gas membranes. These will include BBA-certified systems, material breakdowns, and installation guidance. Stay tuned for updates.

Includes:
• EWI (External Wall Insulation) BBA-accredited insulated render systems using breathable Mapei adhesives and finishes.
• Gas protection membranes by Wykamol.
• Roofing solutions from Polyglass.
• Internal wall systems (e.g. Isotherm)

Seal the Envelope Gallery Internal Wall Insulation_EWI

Seal the Envelope Gallery Damp & Gas Protection

Application to Installation - Your partner in delivery of innovative building envelope solutions

Navigating ECO4 can be complex. we simplify it.

Support includes:

✓ ECO4 - specific application guidance.
✓ Evidence formatting and permanence templates.
✓Smart technology alignment.
✓ Quality assurance and coordinator resources.

What we offer:
✓Whole building envelope systems warranty.
✓On-site and remote technical support.
✓Periodic inspections.
✓Detailed documentation to support compliant installation and design.

Approved Innovation Measures

Seal the Envelope Gallery Internal Wall Insulation_EWI

Seal The Envelope 4

Lets Build Better, together!

Whether you're upgrading existing, advertising homeowners, or managing ECO4 applications
Mapei, supported by Wykamol and Polyglass, is your trusted partner in delivering energy-efficient, future-ready solutions.

Warm Homes Skills Programme – Guidance for Retrofit Training

Local Authority Administration Guidance

Our Solutions

Technical Support

Latest Projects

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