Dry Ridge Systems
Dry Ridge Systems: What are they? And what are the benefits?
As of 2014, Building Regulations Standards introduced the BS5534 Code of Practice, this basically changed the way the roofing and building industry had to comply with the new regulations and changes to the standards of practice. One of which brought the introduction of the Dry Ridge System as mandatory requirement on any new-build roof. They stipulated that ‘Mortar alone cannot be used to fix ridges and hips. So, even if mortar is used, the ridges and hips must also be mechanically fixed’.
Traditionally, the ‘wet ridge system’, as it is now referred, was the only system available, used by roofing contractors to secure ridge and hip tiles to roofs. Due to weathering and the natural elements, this mortar compound would invariably break-down over time. The strength of the original mortar mix, whether that be a 3-1, 4-1, 5-1 or in some very poor ‘Cowboy ‘cases, a 6-1 mix of sand-cement-water, would dictate the longevity of your ridge and hip tiles fixings to your roof. The latter breaking down far quicker than the stronger more secure mix.
Also, mortar as a compound, no matter how strong the mix, will not only become porous over time, therefore making it prone to water-ingress, causing it to break down through natural fracturing. This in-turn causes the mortar to break away from its original fixing with the help of gravity and winds, finds its way into your guttering system in fragmented pieces causing it to block up and stem the water run-off. This then leaves voids under your ridge and hip tiles where rainwater will enter at will, as the ridges are no longer sealed. Both of which can be very detrimental to the integrity of your roof and can lead to untold problems further down the line.
Many documented horror stories of loose ridge tiles blowing off people’s roofs and either smashing through their car windows, or severely damaging car bonnets and roofs are not uncommon. Near misses involving the home-owners, are equally as common as they are terrifying to even consider. Add into the equation, that traditional mortar by the nature of its structural make-up, simply isn’t capable of coping with natural land movement of a house, consequently distressing the structural integrity of the roof.
Enter the Dry Ridge System;
A Dry Ridge System is mechanically screw-fixed to the internal timber main-frame of your property, this is achieved by firstly installing pressure treated timber laths which run the full length of the ridge tree and down any hips the property may possess. The pressure treated laths act as an extremely strong connection to the roofs internal structure and are fixed into place using stainless steel screws, giving it the strength of the roofs existing mainframe.
A matting system (depending of the manufacturer) is then applied with a waterproof and breathable membrane, designed to offset the flow of rainwater away, to eliminate the risk of any leaks, but to also ensure the roof can breathe. Then follows the installation of the new ridge tiles, and hip tiles, where relevant, (angled or half-round, depending on the client’s choice). The final part of the installation requires the new ridge or hip tiles to be secured by stainless steel connectors which are then screwed into the pre-installed pressure treated laths. This system is completely maintenance free due to the fact there in no mortar required, but also has an expected life-span of over 50 years.
Also, should you ever require a new roof, this Dry Ridge System can literally be unscrewed, then re-attached after the new roof is replaced. This saves you on the cost of a new roof as you already own and have paid for the Dry Ridge System which would be deducted from your new roof quotation.
I wish to compliment your firm for the excellent work just completed on the roof of my house. I had wasted money early this year with another firm on poor repairs but now all the cracked ridge tiles have been replaced with a new dry ridge system and the chimney stack has properly fitted lead flashing. (No more messy cement pointing). I was so pleased that I then had the flat roofs on two bay windows replaced with lead. Your men were quick, quiet, courteous and very tidy and I would not hesitate to recommend them.
Freda Jack, Whitley Bay.
Benefits of a Dry Ridge System over a Wet Ridge System:
- Easy and quick to install.
- Maintenance free for up to an estimated 50 years if installed by accredited contractors using the premium-grade systems.
- Cost, as there will be no failed mortar and consequential repointing work required ever again.
- Flexibility, as unlike wet-ridge systems, dry ridge systems can cope with land movement, as they are far less rigid.
- Ventilation can be the main cause of internal condensation, a dry ridge system is designed to ensure your roof can breathe, which eliminates any condensation issues associated with a wet-ridge system.
- Wind factors, unlike a wet-ridge system and the risk of ridge tiles becoming dislodged and potentially dangerous, a dry-ridge system has passed tests of up to 100mph winds and rain.
- Aesthetically pleasing due to the fact, the full ridge and hip system is consistently flush, unlike most mortar-based alternatives.
LORD Roofing and Ground Works only use the very best systems that we believe or available on in todays market, as a result, we use either Klober Universal Dry Ridge Systems, or Manthorpe, as not only are they superior in the quality, but they also are designed to cater for every roof tile available.Klober’s Roll-Fix universal ventilating dry ridge and hip system now includes universal seals for use with both half-round and angle ridges. Klober has also made ordering simple as only one kit is required for ridges and one for hips. Both kits include everything you need to fix 5 metres of concrete or clay ridges/hips, a self-adhesive Butylon backing on the ridge roll to provide a permanent weatherproof bond. In addition, four UV-stable colours are available to buy, making it easy to match to most commonly used tiles. Roll-Fix complies with the requirements of BS5534 for mechanical fixing and BS5250 for high level ventilation in support of vapour permeable underlays.
LORD Roofing and Grounds Works also offer a 10-Year GPI Insurance backed warranty on all Dry Ridge Systems in accordance with the government endorsed Trustmark affiliated; Consumer Protection Association, and Confederation of Roofing Contractors License as standard. This also transferrable in the event of a re-sale. All works carried out by LORD Roofing and Grounds Works Level 4 Master Roofers and time-served joiner.
The ‘LORD Company Promise’ to our clients is; “To deliver the very highest quality of customer service, workmanship, and standard of products, for the very best price possible.”
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We will never be beaten on price, on a like-for-like basis.
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