Historic wood windows are built to last. But even the best original construction needs attention eventually — and the signs are usually obvious once you know what to look for. Here are five signals that your windows need professional work, not just a fresh coat of paint.
1. Paint Failure on the Sill and Bottom Rail
The window sill and bottom rail take the most water exposure of any part of the window assembly. Paint on these surfaces usually fails first: peeling, bubbling, or lifting entirely. Underneath the failed paint, the wood may still be sound — or it may be soft.
Paint failure is not automatically a restoration emergency. But it does mean the wood is no longer sealed against moisture. The longer the paint stays off the sill, the more water infiltration, and water infiltration leads to rot. A window with early-stage paint failure is a much easier repair than one where the rot has been left for years.
Scraping and repainting a window that has rot underneath is a waste of effort and money. Before repainting, have the wood probed — a professional can tell you in minutes whether the substrate is sound or compromised.
2. Rope or Cord Failure — a Sash That Will Not Stay Up
If the lower sash drops suddenly when you release it after opening, or if it falls entirely to the bottom of the frame, the sash cord has broken. The cast-iron counterweights — hidden in the side pockets of the frame — are now resting on the bottom of the pocket, doing nothing.
This is one of the most common historic window failures and one of the most straightforward to repair. The fix involves accessing the weight pocket, retrieving the weight, and running new sash cord or chain over the pulley. The window is then balanced and operational again.
What is not the right fix: propping the sash open with a stick, which stresses the joints of the sash, or replacing the window entirely when a $50 cord is the real problem.
3. Rattling Sashes in Windy Weather
A sash that rattles when the wind blows — even when fully closed — means a gap has opened somewhere between the sash and the stop. This is almost always a weatherstripping failure: the material that sealed the gap has dried out, compressed, or fallen away over years of operation.
The gap is not just a draft problem. An unsealed window allows warm air to escape in winter and conditioned air to escape in summer, driving up heating and cooling costs. A properly weatherstripped historic window performs close to a modern double-pane replacement in actual energy usage — and costs a fraction of the price.
Bronze V-strip weatherstripping, installed in the channel the sash slides in, is the traditional and durable solution. It lasts for decades and does not alter the appearance of the window. DIY foam weatherstripping from the hardware store is a temporary fix that tends to compress and fail within a year or two.
4. Windows That Will Not Open — Painted Shut
A sash that will not move is almost always painted shut — a common condition on older homes where exterior painting was done without removing the sash first. Paint bridges the gap between the sash and the stop, fusing them together.
Forcing a painted-shut window open risks breaking the glass, damaging the stop, or splitting the sash joints. The right approach is careful scoring of the paint seal with a sharp utility knife, followed by a dedicated sash tool worked along the parting line to break the bond without damage.
A window freed this way needs to be assessed before it is considered operational — if it was painted shut, it likely was not maintained for years. The sash cords, weatherstripping, and glazing compound all need to be evaluated.
5. Visible Daylight Around the Frame
If you can see light through gaps in the window frame — at the corners, around the stop, or between the frame and the wall — the window is no longer sealing the opening. This is beyond a weatherstripping fix. Something structural has shifted or failed.
In most cases, the gap is caused by deteriorated wood at the sill or bottom corners of the frame. The wood has rotted to the point where the seal between window and house is compromised. Left alone, this worsens every rainy season.
Rot at this level does not mean the window needs replacement. But it does mean professional repair — typically epoxy consolidation and rebuild of the compromised section, followed by proper sealing and repainting. This is work that requires both structural knowledge and the right materials.
What to Do Next
If you have recognized one or more of these signs in your windows, the right next step is a professional assessment — not a Google search for quick fixes. A restoration assessment gives you a window-by-window diagnosis: what is wrong, what can be repaired, and what it will cost to fix before the problem gets worse.
Most historic windows in Baton Rouge are candidates for restoration rather than replacement. The question is not whether to restore, but how urgently the work is needed.
Request a free assessment from Sashmo — we evaluate historic window conditions throughout the Baton Rouge area and provide a clear scope of work and cost estimate for every window we look at.