How to Install Ridge Tiles

Tools and Materials

Before You Start

• Check BS 5534 and BS 8612 requirements — mechanical fixing is mandatory for all new ridge work
• Ensure safe access with scaffold along the ridge — never straddle a ridge without proper support
• Choose a dry ridge system compatible with your tile profile
• Check whether ventilated or non-ventilated ridge is required based on your underlay type
• Order sufficient materials including end caps, vent terminals, and finials

Step-by-Step Installation (Dry Ridge System)

1. Step 1 — Fix ridge batten brackets. Screw batten support brackets to the top of each rafter at the ridge, adjusting the height so the ridge tile will sit at the correct position above the top course of tiles.
2. Step 2 — Fix the ridge batten. Screw the ridge batten (typically 50 x 25 mm treated softwood) to the brackets along the ridge. Check the batten is level and straight along its entire length.
3. Step 3 — Apply the gasket roll. Roll out the flexible sealing gasket along each side of the ridge, fixing it to the ridge batten and allowing the flexible skirt to drape over the top course of tiles. The gasket provides a weathertight seal while allowing ventilation.
4. Step 4 — Fit the first ridge tile. Starting at the end of the ridge (against the wind direction), place the first ridge tile on the ridge batten. Clip the union bracket over the batten and screw to the batten. The clip holds the trailing edge of the tile.
5. Step 5 — Fit successive ridge tiles. Place the next ridge tile overlapping the first by the manufacturer's specification (typically 75-100 mm). Fit another union bracket at the trailing edge. Continue along the ridge.
6. Step 6 — Fit end caps. At each end of the ridge, fit a purpose-made end cap. This closes the end of the ridge and provides a neat finish. Seal with the gasket and screw or clip into place.
7. Step 7 — Fit ridge vent terminals (if required). If additional ventilation is needed (for non-breathable underlay), fit ridge vent terminals at the required spacing. These replace standard ridge tiles at specific intervals.

Common Mistakes

• Using mortar only without mechanical fixing — does not comply with current Building Regulations
• Mixing components from different dry ridge system manufacturers — they are not interchangeable
• Not checking the ridge tile angle matches the roof pitch — causes gaps or lifting
• Starting from the wrong end — always start against the prevailing wind direction
• Forgetting ridge ventilation with non-breathable felt — causes condensation in the roof space

Cost Estimate (2026)

Related Calculators

Use the Ridge Tile Calculator for quantities, or the Dry Ridge Calculator for complete system components.