Check Before You Buy: The Outer Shell

When you're at the lot looking for your next RV, don't let shiny but unimportant features distract you from investigating the build quality of the vehicle's shell. There are two methods RV manufacturers use to construct the outer shell, and different questions you should ask for each.

Conventional Build

The conventional or "stick-n-tin" build method has been prevalent since the 1940's and consists of aluminum siding over a wooden frame. Conventional-built shells are a tried and true as well as affordable option. These trailers are stable and sturdy while also having enough flex that they aren't susceptible to cracking at stress points, as fiberglass units sometimes do. On the downside, they are heavier, more prone to water damage, and harder to clean.

If you're looking at a conventional build, make sure the manufacturer took care with the details. Ask these questions at the lot.

1. How were the walls and seams waterproofed? You want seams that are waterproofed with caulk. If buying used, check whether seams were regularly re-caulked each season.

2. Were screws or staples used? You want screws used in the construction to ensure structural integrity when under flex and stress.

Lastly, if you'll be hauling, make sure your vehicle's towing capacity can easily handle the extra weight that comes with a conventional built trailer.

Laminate Build

The laminate RV build is a modern method of RV construction and is a more premium shell. Laminate shells are made of fiberglass stretched out across a rigid aluminum frame. These shells are tough, resistant to dents and scratches, and easy to keep clean. They're also much lighter. They're not for everyone, however. The laminate sidewall comes with a premium price and has a few pitfalls. De-lamination caused by water intrusion can create what are called blisters, which are hard and costly to repair. If you make the investment in a laminate shell, the key to avoiding water intrusion is early detection. Perform regular checks on the walls, roof and seams to look for cracks bubbles. If something is amiss, take it into the Service Center to address the underlying problems.

Remember, either type of shell can be a great choice, depending on your budget, towing capacity and needs. Just make sure to look for quality before you buy, and regularly inspect your exterior for maintenance needs.

Be sure to check out our recent post on other important aspects of build quality - the main frame and flooring.