Window Reglazing

Glazing putty is the beveled line of compound between your glass and the wood sash — and it's doing three jobs at once. It beds the glass, cushioning a rigid pane inside a wooden frame that swells and shrinks with the seasons, so the two materials can move without cracking each other. It weatherseals the joint, shedding rain off the glass and over the rail instead of into it. And it holds the pane in compression along with the small metal glazier's points hidden beneath it. Traditional putty is a simple, brilliant material — linseed oil and whiting, kneaded to a clay-like consistency — that tools into a crisp bevel, skins over, cures slowly to a firm rubbery seal, and takes paint. When you look at a pre-war window, that neat angled line framing every pane is the putty. When that line cracks, lifts, or falls away, the window has lost its raincoat — and the wood underneath starts paying for it.

Walk the outside of your house and read the putty lines pane by pane. Failing glazing announces itself in stages: first hairline cracks across the bevel, then sections lifting away from the glass like dried mud, then chunks missing entirely with the glazier's points showing and the bare wood rabbet open to the sky. A pane that rattles when you tap it has lost its bedding compression. Inside, condensation or frost concentrating along the bottom edge of the glass in winter often points to air moving through a failed putty line. Two more tells: paint on the lower sash rail bubbling or peeling directly below a cracked putty section — water is getting behind it — and a dark, damp line in the wood at the glass edge that doesn't dry out. Any of these is worth a photo. Text it to (973) 564-0958 and we'll tell you the same day whether you need spot reglazing, full reglazing, or rot repair underneath it first.

Please don't — caulk over failed putty is the repair we most often have to undo, and undoing it costs more than doing the job right would have. Caulk bridges the surface of the cracks without re-bedding the glass, so water still wicks through capillary gaps underneath; now it's trapped there by a flexible membrane that also holds moisture against the wood. The joint keeps rotting, invisibly, while the outside looks "fixed." Worse, silicone contaminates the wood and glass surfaces, and stripping smeared caulk off both — without cracking a wavy-glass pane that can't be replaced in kind — is slow, delicate work that shows up on the invoice. Real reglazing rakes the failed putty out, addresses whatever the water already did to the rabbet, re-beds the glass properly, and lays a new putty line that will serve for decades. It's not a place where shortcuts save money; it's a place where they compound.

The putty line is the front door for sash rot, and an open door gets used. Rain running off the glass enters the bare rabbet, soaks the thin wall of wood holding the pane, and drains down into the bottom rail — the sash's most vulnerable member. First season: staining and peeling paint below the glass. Following seasons: the rabbet wall softens, the rail's glazing edge crumbles, and decay spreads toward the corner joints. By the time the damage is obvious from across the room, you're no longer buying a reglazing job; you're buying epoxy consolidation or a spliced rail with reglazing on top — and if it runs long enough, full sash replication. The cost curve is steep and entirely optional: renewing a putty line is one of the least expensive services we offer, while the rot it prevents is the reason replacement contractors get to quote five figures. Reglazing on time is the cheapest insurance a wood window can carry.

Reglazing sits at the prevention end of our price list — skilled-labor work priced per sash and per pane, typically about 80% less than the replacement units that failed glazing eventually leads homeowners into, and a small fraction of what the same window costs once rot requires structural repair first. Divided-lite sashes with many small panes take longer than single-pane sashes, and any rot we find in the rabbets adds a repair step before the putty goes in — the estimate breaks all of this out per window, in writing. Timeline: photos answered the same day, onsite assessment within 1–2 days, and most reglazing projects complete within 1–2 weeks, including cure time considerations — fresh putty needs to skin before painting, and we sequence the work so your windows are weathertight throughout. The work is backed by our 5-year workmanship warranty and done by a fully insured crew, Mon–Fri 8:00 AM – 6:00 PM.