Dry Ridge System

Traditionally ridge and hip tiles are fixed with mortar which cracks and leaks. Our advanced dry ridge system is a maintenance-free solution that delivers on both on long term aesthetics along with peace of mind and comfort, whatever the weather conditions.
Dry ridge system installed at Eastlands Retirement Village

Our innovative Dry Ridge System is a ventilating dry-fix solution for mechanically fixing ridge tiles. The system is a modern alternative to a mortar bedded ridge and creates a discreet finish that is far superior in aesthetics and function. So much so that it is the chosen ridge and hip solution by Central Developments.


  • Installation requires a top batten on the ridge line to securely fix the ridge roll and ridge tiles.

  • Seals ridge to ridge to give a tried and tested weather-tight seal.

  • Provides an exceptionally durable method of securing ridge and hip tiles that ensures high resistance to storm damage.

  • Gives a continuous weather-tight ventilation path from the interior roof cavity to the outside.

Dry Ridge Components

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CriteriaDry Ridge SystemMortar Bedding
VentilationDouble ventilation channels allow air to escape through the ridge preventing mould and rot of roof structureMortar hardens and does not allow airflow through the ridge line
Maintenance-freeAllows expansion and contraction of roof in varying weather conditionsHardened mortar cracks with the movement of the roof which requires ongoing maintenance and waterproofing
WaterproofWater resistant and do not allow water to penetrate through the roofs surfaceWater penetrates through the cracks in the mortar causing damage to the roof interior
Time & labour-savingEasy to use the no-fuss, no-mess application takes approximately 2.5 hours/10m roof ridgeTakes approximately 6 hours/10m ridge line
Cost-savingNo long-term maintenance requiredWaterproofing to seal cracks every other year
Design aestheticsNeat and clean roof linesMessy ridge and hip-lines and waterproofing overcoats. Usually the overcoat colour does not match the tile colour

Setting standards with our product testing methods we expose our products to sunlight simulation and UV radiation, acid rain, freeze thaw resistance and thermal shock testing. We test the ease of fixing and use of our products internally. BMI weathering stations in eight countries worldwide additionally help us to simulate and predict the durability of our products many years into the future in all types of climate conditions.

Traditional mortar bedding is widely used to fix roof ridge and hip lines in South Africa. Though the initial setup costs of mortar application may be the driving factor for its popularity, its short life-span, particularly in harsh weather conditions, urges more awareness to more sustainable ridge and hip-line applications.