New Dry Ridge Installed

New Dry Ridge Installed

A dry ridge system simply involves fixing ridge and hip tiles to a roof without sand or cement mortar, but instead with screws and clamps, which fix each ridge tile to the roof, with waterproof unions beneath the screws to divert water away from the join.

One of the most popular forms of dry ridge systems is the roll-out dry ridge system. The ridge roll is laid out along the ridge before the ridge tiles are installed, to provide a surface on which to connect the ridge tiles.

The roll-out ridge system provides ventilation through the roll of the membrane, whilst also creating a waterproof and weatherproof roof ridge.

Dry ridge system vs mortar
Unlike a contemporary dry ridge roof system, the more traditional sand and cement method has a number of issues.

To begin with, using mortar to fix roof ridge tiles is not only time-consuming but the mortar often cracks and falls out over time. This is partly due to temperature fluctuations and weather conditions, leading to an unstable roof ridge that is exposed to the elements.

What’s more, mortar-fixed ridge tiles require regular maintenance to prevent them from disconnecting and falling off.

Last but not least, British Standards, particularly BS 5534:2014+A2:2018 and BS 8216:2018, suggest that the traditional mortar method of fixing tiles onto roofs should only be used where absolutely necessary, for example in period or heritage properties, and for simple repairs.

The benefits of a dry ridge system
Dry ridge systems bring a number of benefits to your roofing project.

Firstly, the installation process is relatively quick and simple, which can result in big savings in labour and time costs.

Low maintenance
Secondly, once installed, a dry ridge system requires very little maintenance – unlike the traditional mortar-based ridge system which requires regular maintenance to replace degraded mortar.

The sturdiness of the dry ridge system is another of its major draws – during bad weather and strong winds, you can be confident that your ridge tiles will not blow off and cause damage to your roof or anything below. Additionally, the system is waterproof, preventing water ingress into roof spaces, which can occur on damaged mortar-based ridge tile applications.

Dry ridge systems also provide your roof with a level of flexibility that is not achievable with mortar-based ridge systems. Roofs naturally experience some movement, whether it is from vibrations of nearby transport and machinery, or through thermal expansion and contraction. This movement was one of the causes of cracks appearing in mortar in the traditional ridge systems, but the dry verge system allows movement without the risk of damage.

Another feature of dry ridge systems is that they can provide a level of ventilation that is otherwise impossible with traditional ridge tiles. The roll-out ridge can allow moisture to move out of the roof void, which helps to prevent the build-up of condensation that may lead to rot and other issues that can lead to structural damage.

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