Dry verge caps have taken off in the last 20 years – and homeowners and builders alike boast their cost-effective and low-maintenance benefits. But what are dry verge caps, and how do they work? And are they as good as they seem?
What Is a Dry Verge System?
This modern roofing alternative to the traditional mortar verges is called a dry system.
They’re made of interlocking caps which clip or screw onto the edge of roof tiles to create a waterproof seal. While mortar verges can crack or deteriorate over time, dry verge systems tend to be longer-lasting.
How Does a Dry Verge System Work?
Dry verge systems (or ‘dry fix’) are called such because they don’t use any mortar to attach to the roof. Instead, they use a ‘dry’ system, like screws or clips, mechanically fixed to the roof. Mortar than crack, but this interlocking method can create a strong, weather-protected barrier.
And it’s not just about durability or watertight seals. Dry verge systems can use eave vents to create a passive ventilation system – good for your home and good for you. These vents encourage the natural movement of air without mechanical systems.
What Are the Pros of a Dry Verge System?
Dry verge systems get a good rep – and here’s why.
Durable
Dry verge systems are known for being long-lasting. Unlike traditional mortar, dry verge systems are less prone to cracking or dislodging caused by weather.
Low Maintenance
Not only are they long-lasting, but you won’t have to do much to keep them going either. Dry verge systems require minimal maintenance and rarely need repairs.
Easy to Install
Dry verge systems are quick and easy to install. You don’t have to wait for a dry spell – the interlocking components can be fitted together in any weather.
Better Protection
The interlocking system provides enhanced protection from the elements, stopping wind and rain from getting into your home. It is also more secure against birds that might try to nest inside your roof space.
Cost-Effective
The initial cost of dry-fix roofing is made worth it with the years of cost savings after installation. You won’t need to worry about paying for repairs with dry verge systems.
Ventilation
Some dry verge systems allow fresh air to flow into your home, creating a natural passive ventilation system. This can protect your property against unwanted damp and potential mould.
What Are the Cons of Dry Verge Systems?
No system is perfect – here are the problems and downsides of dry verge systems.
Poor Installation
In theory, dry verge systems are easier and more efficient to install. But if you – or your roofer – have no experience with these types of roof verges, you might find that improper installation can cause damage to your roof or gable wall or water ingress.
Limited Looks
Dry verge caps are sleek and modern-looking. But they’re also often made of plastic and come in a limited range of colours. If you’re after the traditional look of mortar, dry fix roofing may not be for you.
Higher Upfront Cost
Dry verge systems can cost more to install. But, as mentioned above, they can become cost-effective over time.
How to Install Dry Verge Systems
We mentioned dry-fix roofing can be complex to install, but if you fancy yourself a DIY-expert, you might want to give it a go.
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Inspect the gable end of the roof to make sure it’s clean and dry. Remove any debris and mortar.
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Fit the starter units at the base of the verge. Align with the eaves and securely fix to the fascia board.
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Attach the verge units to the end of each roof tile or shingle with a clip or screw, overlapping them.
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Install the ridge cap at the top of the roof to connect the sides and seal the verge units.
When you’re done, check for gaps and make sure the dry verge roofing is watertight.
Can You Put a Dry Verge on an Existing Roof?
Yes, it’s possible to retroactively install a dry verge on an existing roof, so you can upgrade your home without paying for a full roof replacement. You’ll need to remove the old mortar left from the previous system, and if your roof battens are too short or in poor condition, you might need to cut them back and replace them with longer pieces.
It’s best to speak to a roofing expert if you’re considering putting dry verge caps on your existing roof.
How to Maintain Dry Verge Systems
They may be low maintenance, but even dry verge systems need looking after.
Regularly inspect your roof and look for the following:
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Verge caps and trimmings for any signs of damage or loose parts
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Sealing integrity between verge units and the roof tiles to make sure it's watertight
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Remove any debris, like twigs or moss
Replace any missing parts you find and fix damage. Ask a professional for advice if you’re not sure what you’re looking at.
Final Thoughts on Dry Verge Systems
Dry verge systems, or dry-fix roofing, are a long-lasting and cost-effective system for your home. Aside from being low maintenance, you’ll also enjoy efficient ventilation with some options. While they might cost a bit more to install and go wrong when installed badly, dry verge systems are a modern alternative that’s growing increasingly popular for a good reason.
FAQs
Is Dry-Fix Roofing Worth It?
Yes, dry-fix roofing is usually worth it for most homeowners – especially if it comes with the added benefit of passive ventilation. They’re durable and long-lasting, meaning that you won’t need to pay for upgrades or renovations.
How Much Does Fitting Dry-Fix Roofing Cost?
Installing dry verges can range from $40-160 per linear metre. The costs depend on the type of verge system, the length of installation and the complexity of the project. If you’re hiring a professional to do the job, labour costs can add another $20-30 per metre. Overall, you can expect to pay between $400-1,200 for your whole roof.