The Average Lifespan Of Your Plastic Storage Shed

When it comes to backyard storage and organization, you can't do better than a shed. And plastic sheds are by far the most budget-friendly. But before you pull the trigger on Costco's most affordable storage shed, it's important to know just how long you can expect your plastic shed to last. On average, a high-quality plastic shed can last 10 to 20 years, while very cheap models may only stand up well for 5 to 7 years. 

When shopping for a plastic shed, you're going to be choosing between resin options, such as high-density polyethylene (HDPE), or vinyl, typically polyvinyl chloride (PVC). While both are resistant to rust, insects, and rot, there are some differing factors that could potentially lead to one material lasting longer than the other.

Between the two, resin has the bigger weakness when it comes to sun exposure. Manufacturers mitigate this with UV stabilizers, but resin is more prone to fading when exposed to direct sunlight for years on end. Overall, vinyl sheds are considered to be more long-lasting and can come with longer guarantees. For instance, Duramax offers a 15-year warranty on its vinyl sheds, while resin sheds from premium brands like Lifetime and Suncast typically come with a 10-year warranty.

It's not just sunny climates that can potentially affect the lifespan of your shed. Colder regions that experience a lot of regular snow could also have an impact, both on resin and vinyl. Extremely frigid temperatures can make the plastic panels brittle and less flexible — something even the best shed winterizing routine can't stop. Couple that with a heavy snow load, and you have a risk of collapse on your hands. So, when shopping for a plastic shed at Costco or Sam's Club, prioritize options with sturdy metal framing, double-wall construction, and a high roof-load rating (ideally over 20 PSF) if you live in an area that gets heavy snowfall. 

Ensuring that the shed's foundation is level and solid is also key to making it last. A good base for your shed made from concrete or pressure-treated lumber is essential to keep the plastic from twisting. Additionally, a solid base can help prevent the lightweight plastic structure from blowing away in a wind storm, provided it's properly anchored. You should also regularly perform a check on the hardware, such as structural screws, to make sure they are tight and not broken. 

If you want to make sure you get a good decade (or more) out of a plastic shed, buy from brands with long warranties, like Duramax, Patiowell, and Lifetime. Alternatively, if you have to opt for a cheaper shed, keep your expectations realistic, and know that it will a) fade over time in the sun, and b) probably won't be all that sturdy. At the end of the day, even a cheap plastic shed is still better than having no shed at all.