TB/23 – Ridge Detail: Warm Roof

This warm roof ridge detail illustrates a mechanically fixed dry-ridge junction for a pitched roof insulated between and beneath the rafters.

It is intended for architectural designers, building professionals, contractors, developers and self-builders coordinating ridge fixings, thermal continuity and condensation control. Use it alongside the matching warm-roof eaves drawing; Approved Document L provides the official energy-efficiency guidance.

The detail shows:

• Half-round concrete ridge tiles
• Stainless-steel mechanical ridge fixing
• Ridge batten and proprietary brackets
• Vented top filler units
• Roofing underlay continued to the ridge
• Roof battens and counter-battens
• Ridge board and rafters
• Rigid insulation between the rafters
• Continuous insulated plasterboard beneath the rafters
• Continuity of insulation across the ridge
• Ventilation gap above the insulation where required
• Vapour-control and airtightness layer
• Fire stopping at compartment or separating walls

The accompanying notes cover dry-ridge installation, mechanical fixing, insulation continuity, ridge ventilation, condensation control, airtightness, roof structure and fire stopping.

What This Warm Roof Ridge Detail Includes

• One downloadable PDF construction drawing
• A3 landscape sheet
• Drawn at 1:10 when printed at 100% on A3 paper
• Drawing reference: TB/23
• Detail title: Ridge Detail – Warm Roof

Important Information

This is a standard construction detail intended to provide general guidance. Rafters, ridge members, apex connections and bracing must be designed by a suitably qualified structural engineer.

Insulation thickness, ventilation and vapour-control requirements must be coordinated with the approved U-value calculation, SAP assessment, roofing-underlay certification and condensation-risk assessment.

The drawing does not include structural calculations, a U-value calculation, condensation-risk analysis, SAP assessment or Building Regulations approval.

The PDF is supplied for use by the purchaser on their own projects. It may not be resold, redistributed or reproduced for commercial resale without written permission.