Martin Fireplace Doors — Custom Replacements, Built by Model

Martin Industries of Florence, Alabama shipped factory-built fireplaces into countless homes through the 1980s and 1990s. If yours still works there is no reason to replace the firebox — but the original glass doors rarely survive three or four decades of heat cycles, and the company that made them no longer exists.

Find your Martin model

Open the mesh screens and look for the metal rating plate inside the firebox — usually riveted to a side wall of the smoke shield area, or visible behind the lower louvers or grille at the bottom face of the unit. A flashlight and a phone camera help.

Watch the suffixes. The SF36 family includes SF36, SF36I, SCF36 and SCF36I, which generally share the same door footprint — but an SF36A is a different unit that takes a different door. Write the full model number exactly as stamped.

• Martin BE42 doors
• Martin GD36B doors
• Martin SA36 doors
• Martin SA42 doors
• Martin SB4800 doors
• Martin SC36 doors
• Martin SC42 doors
• Martin SF36 doors
• Martin SF42 doors
• Martin SI36 doors

Model not listed? Send a photo of the fireplace and its rating plate through the AI Fireplace Expert — it matches the unit and tells you what to measure. We build doors for openings, not for model numbers, so an unlisted model is not a problem.

Martin Industries filed for Chapter 11 at the end of 2002 and sold its assets, so no factory doors have been produced since. If the rating plate is painted over or missing, a photo of the fireplace face is usually enough for us to identify the unit.

Why a universal door will not fit

A prefabricated firebox is sheet metal, not masonry: a thin steel face, louvers, and engineered air passages the unit needs to cool itself. A universal or masonry-style door is designed to overlap a brick face and clamp to it. On a prefab that overlap sits proud of the face and blocks the louvers and cooling-air paths.

• Prefab fireplaces need an inside-fit door that mounts within the opening itself.
• Nominal size is not door size. A "36-inch" fireplace is a size class, not a measurement. Actual openings vary between installations because surrounding brick, tile or facing work changes the usable opening.
• The tolerance is tight. A door that is half an inch off will not seat in an inside-fit frame — which is why we build to the nearest 1/8 inch instead of stocking standard sizes.

How to measure your opening

You need three numbers, and you should record the smaller figure of each pair — openings settle and facing work is rarely perfectly square.

1. Opening width — measure at the top and at the bottom.
2. Opening height — measure at the left and at the right.
3. Rear width — if the firebox tapers toward the back.

Our step-by-step measuring guide walks through it with photos; it takes about five minutes with a tape measure. If you are not sure whether you have a prefab or a masonry fireplace, start with masonry vs prefab.

Which doors we build for prefab fireboxes

Three of our lines cover almost every prefab replacement:

• Brookfield — the most common prefab replacement. A flexible-mount frame that clears factory louvers cleanly and forgives slight measurement variance.
• Stiletto Cutback — a modern slim profile for units with cleaner-line surrounds. Inside Fit primary, with a cutback variant for overlap installs.
• Cabot — slim and modern, for models without louvers such as inserts and see-through units.

Not sure which fit type you need? Inside fit vs overlap fit explains the difference in two minutes.

Ordering

Configure your door on the fireplace doors collection — enter your dimensions, choose frame style and finish, and your exact price appears online. No quote request, no waiting for a callback. What drives the price is line, size and finish; our fireplace doors cost guide breaks the ranges down.

Free standard shipping on orders over $99; orders under $99 ship for a flat $9.95. Every order gets a hand fit-review before it goes into production. Questions about your model: (949) 619-7824.