Why a Dry Ridge Roof?

The Neat and Discreet Ridge & Hip Line

In South Africa, mortar is the traditional method of fixing roof ridge and hip - tiles to the roof structure. Though the initial set-up costs of mortar application may be the reason for its frequent use, its short life-span and resulting maintenance-costs, particularly in our harsh weather conditions, urges more awareness to how your roof ridge and hip-line is secured. 100% of roofs in Germany are fixed with Dry Ridge attesting to the benefits of this method. The benefits of a Dry Ridge System far outweigh the initial cost, including no long-term maintenance. Our dry ridge rolls are manufactured in Germany and tested in our Group Technical Facility in Germany. 

You may think that your ridge and hip-line does not have much affect on the interior of your home, but this is not the case. Read on to understand why Dry Ridge application is the preferred method of ridge and hip installation. To start, watch the short video at the bottom of this page.

Kro Clip
Ridge Tree
Ridge Clip

Features of Dry Ridge Roofs

Dry Ridge
  1. Storm-proof, water-resistant
    • The Ridge Tree and Ridge Clips, are screwed into the batten structure of the roof.
    • The secure fixing of the system to the roof structure, offers better resistance to wind uplift during storms.
    • In the great storms of 1987 and 1990 in the UK, more than 1 million roofs were affected but not a single properly-fixed Monier Dry Ridge roof was damaged.    
    • Dry Ridge rolls take the shape of the tiles and ensure there are no gaps for water penetration.
  2. Health benefit - ventilation 
    • According to the World Health Organisation, an important determinant of dampness and biological growth (in the forms of mould) in indoor spaces is ventilation. This is dangerous to your health.
    • The ventilating Compact Roll has a breathable, waterproof membrane allowing air to escape but keeping water out.
    • The inside of the home does not risk mould and the consequential health problems that arise, because the Compact Roll, allows for ventilation through the roof ridges and hips.
  3. No Maintenance
    • There is no long-term maintenance required because the material of the ridge rolls allow for the expansion and contraction of the roof structure in varying conditions. 
    • Traditional waterproofing of mortar ridges occurs once cracks have formed in the ridge line which cause leaks and roof damage.

Physical Attributes of Mortar Roofs

Kro Clip
Ridge Tree
Mortar Ridge-line
  1. Strong yet over time, cracks and leaks
    • Mortar hardens therefore it does not expand and contract with the weather condition or varying temperatures.
    • Hairlines cracks form and increase in size when water gets into the cracks and frost forms in the cold weather.
    • Rain penetrates these cracks and causes damage to the interior of the roof and home.
  2. Not storm -proof or water resistant
    • On-going rain leaking through the cracks of the mortar can cause trusses to rot and the damp can result in mould.  Mould is a serious health risk to occupants of the property.
    • The mortar does not allow ventilation, so the roof cavity gets hot and no air is able to escape through the ridge and hip-lines.
    • The mortar can eventually crumble and it is no longer holds the ridge and hip - tiles to the roof structure.
  3. Maintenance that results in messy finishes
    • Long-term maintenance required.  
    • Traditional waterproofing ('lap-en-plak') occur when the ridge and hip-line starts to leak.