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Conservatory Roof Leaking: Causes & How to Fix

23 July 2024
Inside of a conservatory, looking up at the skylightInside of a conservatory, looking up at the skylight

 

If you can see drops of water falling from your conservatory roof, areas of damp or musty smells, there’s an issue. While a conservatory should be a peaceful space to relax and enjoy nature, leaking conservatory roofs are more common in older conservatories and can really damage your interior. 


This guide explains why your conservatory roof could be leaking, how to fix it and what to do if it’s beyond repair. It could be time for a conservatory replacement.

Why is my Conservatory Roof Leaking?

If you have spotted damp patches on your walls or flooring, it could be because of a leaking conservatory roof. A leaking roof is more common in older conservatories, especially those with a polycarbonate roof, since most are designed to last just 10-15 years. 


While a leak may seem like a minor inconvenience, it can result in structural damage and mould if left unaddressed. It could also be a safety threat if water gets into your electrical appliances and sockets. By finding out the root cause quickly, you can avoid spending a fortune on repairs or replacing your furnishings.

Wear and tear

In older conservatories, the roof panels are secured with sealing and flashing which can crack or degrade over the years leading to holes and gaps. Silicone sealants typically used in conservatory roofs don’t perform well with long term sun exposure or stress from the weather, and issues like mould or damp can cause it to break down further. The sealant can also break away from any roof windows, providing another entry point for water. 

The style

A flat roof might be more prone to leaks because, unlike a pitched roof, the water has nowhere to go. It tends to pool on top of the roof and can worsen any gaps or cracks. 

Slipping panels

Old polycarbonate or glass roofs are also at risk of cracking or slipping in stormy winds or because of accidental damage like falling debris, which can create gaps for water to enter. Roof panels should be secure and fitted correctly to prevent this. 

Materials

Polycarbonate panels might be less helpful at preventing leaks, because the material expands and contracts depending on the temperature which could lead to gaps. It also becomes more fragile after long term sun exposure. 


On the other hand, glass panels are at risk of cracking from impact caused by hail or falling debris like branches or nearby building works. Modern solutions like a tiled roof are more weather and impact resistant, and designed to last for over 50 years. 

 

Blocked gutters

Blocked gutters could also be a culprit for your leaking conservatory roof. If fitted incorrectly or filled with debris, the water can’t drain so it seeps into your roof and walls. 


Of course, the leaking isn’t limited to just your roof – find out more about other types of conservatory leaks.

How to Fix a Leaking Conservatory Roof?

It’s better to spot the leak early, so you can take immediate action to prevent it from getting worse. 


Where you suspect a leak, take a good look at your conservatory roof panels, sealing, joints and the final point to check for holes or cracks. 


If it’s a crack or hole in the sealing, it’s good news because you can fill it up quite easily with a silicone sealant. Start by removing the old sealant using a knife and scraper, and then clean the area. Squeeze your new sealant across the area, removing any excess with your finger (wearing gloves) and then allowing it to dry.


A slipped roof panel will have to be removed and repositioned. From the outside, safely remove the slipped roof panel and clean it thoroughly. Next, fix it back onto the roof in the correct position securing it with sealant. As with any outdoor job, it’s always better to pick a dry day to carry out this work.


If accessing the roof is unsafe, call in an expert who will have the tools and training to fix your roof panel safely. They might need scaffolding or if the panel is beyond repair, they might suggest replacing it. 


Be sure to check your guttering for blockages too. If you find any, remove it manually and flood with water to check the flow. 


While these fixes seem simple enough, if your roof is really old or battered, it could continue to leak regardless of the repairs. One option is replacing the roof – which isn’t as scary as it sounds.

 

The Cost to Fix a Leaking Conservatory Roof

A brand new polycarbonate roof ranges between £1900-£8500 depending on its size, style and your location, and labour costs around £1500 for a three day installation. When making your decision, weigh up the upfront costs with the long-term value – including what the space will be used for, and how long you plan to stay in your home.


If a panel has slipped or needs to be replaced, it can cost you up to £1000 depending on its size, material and labour costs. A waterproof sealant costs around £10 and you can fix it for free if you feel confident doing it yourself. 

Replacing a Leaking Conservatory Roof

Leaks usually get worse if your conservatory is old and in a poor state of repair. In this case, it may be worth replacing the roof, so you can continue to enjoy the additional space. 


Modern solutions like Eurocell’s Tiled Conservatory Roof Replacement are stylish and fully watertight to prevent leaks. It’s a cost-effective option since the tiles can be fitted onto an existing conservatory frame and installed in as little as two days. As well as waterproofing your conservatory, it improves efficiency helping you save on energy bills.  


The tiles are manufactured from recycled polymer, composite or steel with a waterproof guarantee of up to 40 years. As well as being water resistant, a tiled roof is impact resistant to prevent damage from heavy rain, hail, or building works.

 

What to do if Leaking Conservatory Roof is Beyond Repair?

If your roof is beyond repair, your conservatory could become an unusable, damp space that brings down the look of your home. Luckily, giving it a new lease of life could be as simple as replacing the roof which you can do in just two days, transforming it into a bright and airy retreat. 


Your other options include getting a brand new conservatory, or having a conservatory conversion, which is where your old conservatory is replaced with an innovative and efficient extension. This eliminates many common issues like leaks, draughts and condensation. Your old conservatory is recycled and a prefabricated extension is fitted onto its existing base in as little as two weeks. 


The EurXtension process won’t cause disruption since the insulated SIP panels are manufactured off-site to your specification, and then fitted together. The result is a fully functional space that you can enjoy whatever the weather, and it may also add value to your home.


Find out how to upgrade your conservatory

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