FAQ'S - Frequently Asked Questions

No. Anyone can order from MDI Supply — contractors, property managers, locksmiths, and door companies, installers and end-users. Although most of our customers are trade customers and typically not homeowners. You can check out online without an account, though creating one makes it easier to track orders and place reorders.

Yes. For multi-opening projects, special sizes, or bulk quantities, send us your door schedule, hardware list, or plans through our contact page and we'll prepare a quote.

Measure the existing door or frame opening and confirm the handing before ordering. Our Resource Center includes guides that walk through handing, bevel, and common door and frame dimensions. When in doubt, send us photos and measurements and we'll verify before you buy.

Contact us as soon as possible. We can usually change or cancel an order that hasn't shipped yet. Custom-made and made-to-order items may not be cancelable once production has started. Some items are noted on the item page that they cannot be canceled, returned or exchanged.

Many of our hollow metal doors and frames are available with fire labels. Fire rating requirements depend on the wall assembly and the local code, and rated openings must use rated hardware and be installed per the label. Check the individual product page for rating details, or contact us with your opening requirements.

Finish availability varies by product. See our Hardware Finish guide for finish codes and what they look like, and check the product page for the finishes stocked for that item. We offer products and finishes beyond what is available in our website. Use our contact page or give us a call if you have a question.

ANSI/BHMA grades rate hardware durability and performance. Grade 1 is the highest and is intended for heavy commercial traffic, Grade 2 for medium-duty commercial, and Grade 3 for light commercial or residential use. For schools, healthcare, and other high-traffic buildings, Grade 1 is usually specified.

We typically do not stock parts. Depending on the part needed and the manufacturer, we may be able to obtain what you need.  Send us the manufacturer and model number stamped on the device, or a photo of it, and we'll identify the correct part or a compatible replacement.

Yes. Product pages include specification details where available, and we can supply submittal packages, cut sheets, and installation instructions on request.

Both. You can buy a hollow metal door on its own, a frame on its own, or a complete door and frame unit. Complete units are the simplest option for a new opening because the door, frame, and prep are matched for you. See our Complete Door/Frame Units section, or contact us if you are replacing only one part of an existing opening.

Gauge varies by series and application — lighter gauges for interior openings, heavier gauges for high-traffic and exterior use. The gauge for each product is listed in the specifications on its product page. If you are matching an existing opening or working to a written spec, send us the spec and we will confirm the correct series.

A knock-down (KD) frame ships flat in three pieces and is assembled at the opening, which makes it easier to ship, store, and install — including around an existing wall. A welded frame arrives as one fully welded, squared assembly and is stronger and more rigid, which is why it is usually specified for exterior, high-abuse, and heavier-duty openings. Installation instructions for both are in our Resource Center.

Yes. Doors and frames can be made with vision light cutouts, louvers, and hardware preparations. Custom cutouts and preps are made to order, so confirm locations and hardware before ordering — send us your hardware or a cut sheet and we will verify the prep matches.

Most doors and frames are supplied with standard preparations, and additional prep can be added for the hardware you are using. To get it right, tell us the lock or exit device make and model, hinge type and quantity, closer, and whether the opening is fire rated. Hardware location drawings are available in our Resource Center.

MDI hollow metal doors and frames come standard with A40 galv steel, which do not need to be prime painted.  You can apply finish paint directly to the A40 steel We can apply a prime coat (BHMA 600 / USP) to the doors/frame when required for an additional fee. Prime paint is intended to be field painted after installation. Prime coat is not a finish coat and does not provide long-term corrosion protection, so plan on painting. Check the product page for the finish supplied with a specific item.

No. MDI is a distributor and fabricator and does not offer installation or field measuring services. If you need an installer, we suggest searching for a local licensed contractor or qualified installer. We are glad to help confirm sizes, handing, and hardware prep before you order — send us your measurements and photos through our contact page.

Hardware and smaller items ship by parcel carrier. Doors, frames, and other oversized items ship by LTL freight and are typically crated, which usually means curbside delivery on a truck — plan to have someone available to receive and unload the shipment.

Lead times depend on whether the item is stocked or made to order. In-stock hardware typically ships quickly, while custom doors and frames are built to your specifications and take longer. Contact us for the current lead time on a specific item. Most item pages state current lead-times. And we often ship sooner than the posted lead-time.

Inspect the shipment before signing for it. Note any visible damage on the delivery receipt, take photos, and contact us right away so we can file a freight claim and arrange a replacement. Signing a clean delivery receipt makes damage claims much more challenging to resolve.

Return terms, including which items are non-returnable, are listed on our MDI Supply Policies page. Custom and made-to-order products generally cannot be returned, so please confirm sizes, handing, and finishes before ordering.

We accept major credit cards and the payment options shown at checkout. For purchase orders or other payment arrangements, contact us before placing your order.

Products carry the manufacturer's warranty. If you have a warranty issue, contact us with your order number and a description of the problem and we'll help coordinate with the manufacturer. MDI will always take point on a warranty claim. If you bought the item from us, we will help facilitate any warranty claim.

Use our contact page to reach our team. Include the opening dimensions, product model numbers, or photos if you have them — it helps us give you a precise answer faster. Or you can simple call us toll-free at 888-634-3667.

Yes. For larger quantities, repeat orders, or full project packages, contact us with your list and we will price it. Send your door schedule or hardware list through our contact page for a quote.

Yes. If you are buying for resale or your organization is tax exempt, you can upload your tax exempt document once your in the shopping cart. Contact us first — tax cannot always be removed after an order has been processed online.

We work with schools, municipalities, and other institutional buyers. Contact us with your purchase order requirements before ordering so we can set up the paperwork and payment terms.