Cromar Underlay Support Trays 1.5m x 300mm are durable roofing accessories designed to support and protect roofing underlay at the eaves. Manufactured from robust, lightweight plastic, these trays help prevent the underlay from sagging into the gutter while maintaining a clear drainage path for rainwater. Measuring 1.5 metres long and 300mm wide, they are suitable for use with most roofing membranes and are typically installed beneath roof tiles or slates at the eaves line. By guiding water safely into the gutter and reducing the risk of ponding or rot at the roof edge, Cromar Underlay Support Trays contribute to improved roof ventilation, longevity, and overall weather protection.
Cromar Underlay Support Trays 1.5m x 300mm
£2.56 inc. VAT
£2.13 ex. VAT
- Brand: cromar
- Manufactuer: cromar
Cromar Underlay Support Trays 1.5m x 300mm are rigid eaves protection components used in pitched roofing systems to support and guide roofing underlay (felt or breathable membrane) into the gutter. Installed at the roof eaves beneath the first course of tiles or slates, the trays prevent the underlay from sagging between rafters and protect it from water pooling, wind uplift, and deterioration over time. They help ensure that rainwater is directed safely into the gutter, reducing the risk of moisture ingress, rot, and damage to the roof structure while maintaining proper ventilation and drainage at the eaves. These trays are commonly used in new roof installations and refurbishment projects to improve the durability and performance of the roof’s underlay system.
The Cromar Underlay Support Tray (1.5 m × 300 mm) is used at the eaves of pitched roofs to support roofing underlay and prevent it from sagging between rafters. Installed beneath the roofing underlay and above the fascia board, it provides a continuous rigid support that directs any moisture or condensation safely into the gutter while maintaining a clear ventilation path into the roof space. The tray is commonly used in both new-build and refurbishment roofing projects with tiled or slated roofs, helping to protect the underlay from UV exposure and wind uplift at the eaves. However, it is not designed to act as a structural component or substitute for proper roof ventilation systems, and it must be used in conjunction with suitable eaves ventilation products where ventilation is required.
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| Elementlength | |||||||
| up to 1,5 m |
up to 2,5 m |
up to 3,5 m |
up to 4,5 m |
up to 2,5 m |
up to 3,5 m |
up to 4,5 m |
|
| Type of window frame material |
Minimum witdth of joints for a butled mounting b in mm |
Minimum witdth of joints for a inner mounting b in mm |
|||||
| Hard PVC (white) | 10 | 15 | 20 | 25 | 10 | 10 | 15 |
| Hard PVC and PMMA (dark) (colour extruded) |
15 | 20 | 25 | 30 | 10 | 15 | 20 |
| Hard PUR integral foam | 10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Wood-aluminium-window | 10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Aluminium-plastic sandwich frame (bright) |
10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Aluminium-plastic sandwich frame (dark) |
10 | 15 | 20 | 25 | 10 | 10 | 15 |
| Wooden window frame | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
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