Lead Window Trays

Professional design and installation of compliant lead window tray systems for residential, commercial, and heritage buildings.

Lead window trays play a critical role in managing moisture at window openings within cavity walls. When correctly specified and installed, they prevent water tracking above openings, protect internal finishes, and support the long-term performance of masonry structures.

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Lead Window Tray Installation

Lead window trays are installed above window openings to intercept moisture travelling through cavity walls and safely redirect it to the external face of the building. They are a key detail at window heads, particularly where lintels, cavity closers, or structural changes introduce potential water paths.

Incorrect detailing, missing trays, or poor installation can result in water tracking internally above windows, leading to damp staining, plaster damage, and deterioration of internal finishes. Our approach focuses on correct specification, accurate detailing, and compliant installation to ensure window trays perform as intended over the life of the building.

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Roof

What Lead Window Trays Help With

Lead window trays are designed to manage water movement within cavity walls and protect vulnerable junctions at window openings. When trays are missing, damaged, or incorrectly detailed, a number of moisture-related issues can occur.
protection

Damp Prevention

Correctly installed lead window trays help manage moisture above window openings, reducing the risk of long-term damp developing behind internal wall finishes.

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humidity

Water Ingress

Lead window trays intercept water travelling across cavity walls and redirect it externally, protecting window heads, lintels, and surrounding masonry.

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leak

Water Leaking

Localised water leaks can occur where window trays are missing or poorly detailed, allowing water to track internally above window frames.

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humidity

Penetrating Damp

Failed or incorrectly installed window trays can allow moisture to pass through masonry, leading to penetrating damp and internal damage around openings.

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Not sure which issue applies? Speak to a specialist

Our Approach

We follow a structured, technically led process to ensure every lead window tray installation meets regulatory and performance requirements.

1

Site Survey & Assessment

Inspection of window openings, cavity construction, lintels, and existing detailing to identify risk areas and failure points.

2

Specification &
Detailing

Tray design aligned with BS EN 12588, LSA guidance, and project-specific construction requirements.

3

Installation & Sign-Off

Installation carried out by qualified leadworkers, followed by checks to confirm correct positioning and integration with surrounding masonry.
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Applications

Lead window tray installation is commonly required across a wide range of building types and project scopes, including:

  • New build developments
  • Extensions and refurbishments
  • Heritage and listed buildings
  • Commercial masonry structures
Each installation is assessed based on the specific window detailing, cavity construction, exposure conditions, and surrounding materials.
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Standards and Compliance

All lead window tray work is carried out in line with current technical and regulatory standards, including:

This ensures installations are durable, compliant, and fit for purpose across the full life of the building.

Why Choose TrayTek

TrayTek combines decades of leadworking expertise with a commitment to technical accuracy and long-term building performance. We deliver reliable, compliant installations tailored to each project’s requirements, from new developments to Grade I listed structures.

BS EN 12588 compliant lead and LSA-approved detailing methods

Fully qualified craftsmen with heritage and conservation experience

Comprehensive surveys, technical reports and installation guidance

Proven results across residential, commercial and historic properties

Transparent communication and clear project oversight

Practical, durable solutions based on accurate diagnosis

Customer Feedback

Our work is trusted by contractors, developers, and property owners across a wide range of project types. Feedback consistently reflects our technical understanding, attention to detail, and reliable delivery.

Homeowner, Dorset
“Professional, thorough and clear in their guidance. Issue resolved fully.”
Property Manager, Hampshire
“Reliable workmanship and accurate reporting throughout the project.”
Conservation Architect, Wiltshire
“Handled our listed building requirements with care and technical precision.”

Frequently Asked Questions

When are lead window trays required?
They are required above window openings where cavity walls are present to manage moisture and prevent water tracking internally.
Can window trays be retrofitted?
In many cases, yes. Retrofitting may involve localised masonry removal and careful detailing around existing windows.
Are lead window trays suitable for heritage buildings?
Yes. Lead is commonly specified for heritage and listed buildings due to its durability and compatibility with traditional masonry construction.
Do window trays prevent damp?
They help prevent moisture ingress above window openings but are not a treatment for damp caused by unrelated defects.
Are your installations compliant with regulations?
All work is carried out in line with BS EN 12588, LSA guidance, and Building Regulations.

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Request a Survey or Technical Advice

If you require lead window tray installation, investigation of suspected water ingress above windows, or technical guidance on specification and detailing, our team can provide clear, practical advice.