Motorhome skylights: what can go wrong?

The skylight is a wonderful thing - it does what it says on the tin, providing natural light, ventilation, and an enhanced sense of space. However, motorhome skylights can also be a source of various problems, some of which can dampen the joy of your travels. Below, we look into the common issues that can arise with motorhome skylights, with the key one being them unexpectedly coming off when you are moving!

1. Leaks and water ingress

One of the most common issues with motorhome skylights is water leakage. Over time, the seals around the skylight can deteriorate due to exposure to harsh weather conditions and UV rays. This degradation can lead to gaps, through which water can seep during rain or while washing the motorhome.

As a motorhome owner it’s good to regularly check for damp patches, especially after heavy rain. Check that the skylight seal hasn't perished, thereby allowing rainwater to seep in. Not only can this cause water damage to the interior but it can also create a breeding ground for mould.

2. Cracks and breakages

Skylights are typically made of polycarbonate or acrylic, materials that can become brittle over time. A minor impact, such as a falling branch or a rogue stone which kicks up while driving, can result in cracks or even a complete breakage.

We heard from a motorhome owner who found a sizeable crack in their skylight caused by a fallen branch. The crack compromised the skylight’s structural integrity and required an immediate replacement to avoid further damage.

3. Condensation 

Condensation can be a significant issue, particularly in colder climates. Moisture from the interior of the motorhome can condense on the cooler surface of the skylight, leading to persistent dampness, which can cause mould growth and also some pretty unpleasant odours.

Even if you wipe it regularly, you might find that adequately ventilating the motorhome and putting some moisture traps in helps. If you’ve got blinds, be sure to open them regularly.

4. Mechanical failures

Many modern motorhome skylights come with features such as opening mechanisms for ventilation, insect screens, and blackout blinds. These components, particularly the mechanical ones, can fail over time due to wear and tear.

Some people have said it’s a good idea to support the skylight with your hand, pressing up to take some pressure off the gears and shaft when opening it. Others have commented that getting rid of the bristles in the cables is the key to reliable operation. With this one, it might come down to a bit of trial and error, and possibly a replacement if under warranty (fingers crossed).

5. UV damage

Prolonged exposure to sunlight can cause UV damage to the skylight, leading to discolouration (read: yellow) and a weakened structure. This damage can make the skylight look a bit unsightly and reduce its effectiveness in providing natural light.

Apart from keeping it clean and not leaving it in direct sunlight for long periods of time, there isn’t much you can really do about this, especially in older motorhomes, apart from replace them or put a protective film on them.

6. Pests

A damaged or improperly sealed skylight can become an entry point for insects and other larger creatures. Once inside, these unwelcome visitors can cause a range of problems, from leaving little presents behind, to chewing through the upholstery. 

Another good reason to regularly check your skylights!

And finally…

7. Skylight flying off when driving

One of the most alarming issues that a motorhome owner can face is a skylight detaching whilst driving. This can occur due to improper installation, degraded fastenings, or a failure to secure the skylight properly when closing it.

This really is the last thing you want to happen when you’re hurtling down the motorway - not only could you cause an accident or seriously hurt other people on the road - they are also extremely expensive to replace (we’re often talking in the thousands) and also hard to find. We have recently waited six months for a Bessacarr replacement skylight, at around £2,000, although it is the same for many makes of motorhome. If you think yours has come loose, pull over straight away and have a look.

To avoid these issues, regular inspections are crucial. Here are some tips:

2.  Clean them regularly - keep the skylight clean and clear of debris.

3.  Check for cracks - do regularly inspect the skylight for any signs of cracking or damage, and address any issues promptly.

4.  Ventilation - use dehumidifiers and ensure proper ventilation to minimise condensation.

5.  Secure the fastenings!  Always check that the skylight catches are secure before driving, and regularly inspect and tighten any screws or clamps that hold the skylight in place. Check the skylight is fitted properly in the first place, when purchasing a motorhome.

6.  Protect from UV rays - consider using UV-protective films or covers when the motorhome is not in use to prolong the life of the skylight.

By being aware of these potential problems and getting things fixed straight away, you can ensure that your motorhome skylight remains a source of light and joy, rather than a headache on your trips. Safe travels!