Frequently Asked Questions

Inspect your delivery and email support@USPolymersinc.com with pictures of any damage or missing parts within 48 hours of delivery time for free replacement parts. Refer to our Returns / Damage / Cancellation policy for additional instructions.

To order Duramax replacement parts, please contact support@USPolymersinc.com or call 800.483.4674.

A concrete pad or large size concrete patio stone squares is recommended for the floor base. Many customers have elected to install their shed onto a level, wooden platform, while others choose to place their shed directly on the ground. Please note, you are solely responsible for the choice and construction of your foundation.  In all cases, make sure your foundation is firm and level and will allow drainage away from the site.   

For the concrete pad base, first prepare a level bed for a firm footing layer of crushed stone. The concrete pad should then be poured to a thickness of 4 inches(100mm) to 5 inches (125mm). The recommended length and width are specified in the installation manuals).   Allow to dry thoroughly for at least 48 hours before utilization.

The recommended dimensions for the concrete pad itself can be found within the installation manuals. We also recommend leaving 6”-12” around the concrete pad to make it easy to move about the shed.

Many of our sheds do include a floor. Other sheds come with a galvanized steel foundation kit that elevates the shed off the ground about 2 inches. Our customers often lay plywood down on top of the foundation kit to make a floor. Please review the product page on our website to determine if your shed comes with a floor or a foundation kit.

Many of our sheds come with a galvanized steel foundation kit that elevates the shed off the ground about 2 inches. Our customers often lay plywood down on top of the foundation kit to make a floor. While the foundation kit and plywood are not required, most customers utilize them so their sheds are not set directly on the ground.

The foundation kit does not raise the external height of the shed.  For the interior of the shed, the foundation kit is about 2 inches high and many customers use ¾ inch plywood on top of the foundation kit to make a floor. Taken together, the foundation kit and ¾ inch plywood utilize 2 ¾ inches of the shed’s interior height. 

If you elect to use plywood to create a floor for your Duramax Shed, attaching the plywood to the foundation kit is not necessary. The plywood sits on top of the foundation kit and has nowhere to move when cut to the sizes indicated in the installation manuals.

Yes! The door on all Sidemate shed models can be installed on either end of the shed. The door is reservable.

Yes, in general, panels with windows / doors can swap places non-window / non-door panels of the same size. For example, the window panels can be moved to the front, back, and sides for SKUs 40234, 40214, 40224, and 30227. And for example, the doors on the 15ft side of SKU 40216 can be placed on either 15ft side.

Unfortunately, we are unable to sell a second door for any of the Sidemate shed models.

There are no differences between the Duramax Sidemate and Duramax Sidemate Plus sheds aside from the colors.

All of the available color options are posted to our website. There are no additional options.

Duramax Sheds are not officially wind tested and therefore, do not have wind ratings.

We generally do not recommend painting our vinyl sheds. If you choose to proceed, please use paint specifically formulated for PVC. However, keep in mind that this will require ongoing maintenance and may negate the benefits of our durable, maintenance-free vinyl.

Duramax sheds do not come with anchors. We do sell anchor kits for soil. Concrete anchors can be purchased from your local hardware store. 

Yes! We offer several compatible Duramax shelf kits and other accessories. Non-Duramax shelves can also be installed so long as the shelf installation utilizes the shed's columns as this is where the shed’s strength comes from.

No, Duramax shed windows do not open.

Unfortunately, additional windows can not be purchased. The shed kits are prefabricated and are sold as displayed in the pictures.

Yes! Customers frequently add water and electricity to the Duramax Glass Room and other Duramax insulated buildings. You can run the electricity and water lines underneath the building and through the metal foundation kit, or cut directly through the walls. Additionally, the tough-built walls can easily support a mounted air conditioning unit.

The Duramax Glass Rooms have an R-value of 10 for the walls and 13 for the roof. Other Duramax Insulated Buildings have have an R-value of 5.9 for the walls and 6.9 for the roof.

The fire retartdant, PU foam insulation is "sandwiched" and glued between the panels and so more cannot be added. Sometimes people will add extra insulation by adding an insulation layer on the exterior of the walls.

Assembly can vary based on your skill level. If you are a handy person and are experienced with DIY projects, this can be an easy project. The smaller sheds can usually be put together in a few hours, while larger ones might take a few days. We recommend 2 people and some cold drinks for the assembly. The sheds come with detailed install manuals. We also offer assembly videos on most of the product pages on our website for added guidance.

Yes! We've partnered with the Assembly Help company. They've made it easy to hire a service pro with Duramax Shed install expertise. Visit our Installation Services page to review the details.

We recommend hiring a local service professional on Thumbtack.

We recommend hiring a local service professional on Thumbtack.

We offer free delivery to the 48 continental United States. For orders to Hawaii and Alaska, please contact us for a shipping quote.

We are unable to offer delivery to Canada at this time.

Delivery typically takes 3-14 days. The closer you are to the warehouse, the faster the delivery. There are 3 warehouses located in California, New Jersey, and Missouri.

We provide free delivery to the 48 continental United States. For orders to Hawaii and Alaska, please contact us for a shipping quote.

Yes, it is possible to pick up your Duramax purchase directly from the warehouse! Please contact us in advance of placing your order if you would like to make a “will call” pickup so we can confirm this option will work for you.