Glass type, the safety decision on this page | Tempered glass: approximately 400-500°F continuous service temperature. Appropriate for masonry fireplace doors mounted on the *face* of the opening, used per the manufacturer’s instructions which for most masonry door sets means doors open while a fire is burning. Ceramic glass (the Neoceram / Robax family): approximately 1,300-1,400°F, with a near-zero coefficient of thermal expansion. Required for wood stoves, fireplace inserts, gas inserts, pellet stoves and any application where the glass sits in the direct heat path or is closed against an active fire. This is not an aesthetic or budget choice it is a fire-safety decision. |
Thickness | Tempered fireplace door glass: typically 3/16in (5mm) or 1/4in (6mm). Ceramic stove and insert glass: typically 3mm or 5mm, matched to the existing channel and gasket. Ceramic is thinner than people expect its performance comes from the material, not the gauge. |
Tint options | Clear (maximum fire view, shows soot fastest), smoked/bronze (warms the firelight, hides a dark cold firebox when not in use), gray/smoke gray (the most neutral way to hide an unlit firebox). Tints are readily available in tempered. Ceramic glass is generally supplied clear, often with a faint amber cast; assume tint is not available in ceramic unless we confirm it for a specific panel. |
Frame material & finishes | Steel and aluminium frames, and cast or extruded brass. Finishes: matte black, oil-rubbed bronze, brushed nickel, polished or antique brass, textured/hammered black, and pewter. On Cape Cod, powder-coated steel and solid brass outlast plated finishes in salt air near the water, plated nickel and chrome are the first things to pit. Ask for stainless fasteners. |
Mesh options | Hanging mesh curtains on a top track (drawn by hand or by a pull chain), fixed mesh spark panels, or a mesh-only screen with no glass. Mesh in black, bronze, brass and stainless. Stainless mesh is the right call in a salt-air second home that sits unheated over the winter. |
Maximum span / size range | Custom door sets are commonly built anywhere from roughly 24in to 60in wide and 20in to 40in high, with larger openings possible in a bi-fold or multi-panel configuration. Very wide openings may need a centre post. |
Mounting | Overlap fit (frame overlaps the masonry face the forgiving option) or inside fit (frame set inside the opening needs a square opening). Masonry anchors into the firebox jambs or the surrounding face; lintel clamps where the frame hangs from the lintel. |
Air control | Some door sets include adjustable air inlets at the base. These control combustion air, not smoke. They do not change the requirement to keep the damper open while a fire is burning, and they do not make a tempered door set safe to close on an active fire. |
Gaskets & hardware | Fibreglass rope gasket at the glass channel on stoves and inserts (replace it whenever the glass is replaced). Door handles, latches and magnetic catches in the same finish family as the frame. |
Standards & governing authority | Manufacturer instructions and the local building or fire official govern this installation. Massachusetts and Cape Cod towns enforce chimney, hearth-extension and clearance requirements that vary in interpretation; nothing on this page overrides your installation instructions or your inspector. |