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Frequently Asked Questions

Everything you need to know about SUPERUS products, materials, customization and project cooperation.

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Find answers to frequently asked questions about our products, customization solutions and overseas projects.

Interior Door FAQs

50 questions

Wipe with a soft, slightly damp cloth and a mild pH-neutral cleaner, then dry immediately. Avoid abrasive pads, solvent cleaners and excess water, especially on edges and around the lock. Check and lightly lubricate hinges once a year, and tighten hinge screws if the door starts to drop. Re-coating is rarely needed for factory-finished doors in normal residential use.

Pending fact review

Seasonal sticking is usually moisture movement: in humid months the leaf swells, in heated winters the frame moves. First check the hinge screws are tight and the reveals are even. If binding is along the latch edge, a light sanding and re-sealing of that edge usually solves it. Persistent sticking means either humidity control or an underlying frame issue, and both should be addressed before trimming.

Pending fact review

Light surface scratches on painted or lacquered doors can usually be treated with a matching touch-up pen or a fine polish. Deeper chips should be filled, sanded and re-sealed — on veneer, use a matching filler stick and a thin topcoat to keep the repair invisible. Always seal any exposed edge immediately; an unsealed chip is where moisture enters and swelling starts.

Pending fact review

We provide a [X]-year warranty against manufacturing defects in materials and workmanship, covering delamination, joint failure and finish defects under normal indoor use. It excludes damage from water immersion, structural movement of the building, and incorrect installation or storage. Claims are handled against photos and, where needed, a sample return, with replacement parts shipped from stock.

Pending fact review

Yes. We keep specifications on file for every order, so replacement leaves, seals, hinges and matching finish panels can be produced later even after a product line changes. For dealers and project clients we recommend ordering a small spare-parts allowance with the original shipment, which is far cheaper than shipping a single item later.

Pending fact review

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