TR-23 – Ridge Detail: Pitched Warm Roof

This pitched warm roof ridge detail shows a typical junction with rigid insulation installed between and beneath the rafters.

The detail illustrates the dry-ridge system, ridge tiles, vented filler unit, ridge batten and brackets, roof battens, counter-battens, roofing underlay, ridge board and insulated sloping ceiling construction. It demonstrates how the insulation should continue across the apex to form an uninterrupted thermal envelope.

For a facing-brick equivalent of this pitched warm roof ridge detail, see our TB/23 warm-roof ridge detail. Approved Document C provides official guidance on resistance to moisture and roof ventilation.

Supporting notes cover:

• Proprietary mechanically fixed dry-ridge construction.
• Mechanical fixing of ridge tiles.
• Roofing-underlay laps and termination.
• Ridge battens and proprietary brackets.
• Continuous insulation across the ridge.
• Sealing insulation around ridge members.
• Ventilation above the insulation where required.
• Ventilated ridge provision.
• Continuous vapour-control and airtightness layers.
• Rafters, ridge members, apex connections and bracing.
• Fire-stopping at separating or compartment walls.

The customer receives one downloadable PDF construction detail, prepared at a scale of 1:10 and formatted for an A3 sheet.

Insulation thicknesses, ridge ventilation and vapour-control arrangements must be based on the project-specific energy and condensation-risk assessments. Structural roof members, connections and bracing must be confirmed by the structural engineer or roof-system designer.