Do You Actually Need New Windows? How to Tell

“They're old” is not a diagnosis

Almost every conversation starts the same way. The windows are old, so they must need replacing.

Not quite.

Age tells you how long something has been in service. It does not tell you whether it is still working. I have walked into houses with windows older than the homeowner where the frames were sound, the seals still pulled tight and the hardware still turned, and I told them to keep them. I have also seen windows a fraction of that age with rot at the bottom rail and a sash that had not closed properly in years.

So the question is never how old. The question is what has actually stopped working, and whether it can be put back.

The five findings that genuinely mean the window is done

These are the ones where I stop looking for a repair, because there isn't an honest one.

1. Rot or structural failure in the frame

Press a screwdriver handle, or your thumb, into the bottom of the frame and the corners, inside and out. If it gives, if it feels soft or spongy, or if the wood is flaking away, that frame is not coming back. Rot also does not stay where you found it. It travels into the surrounding wall, and the longer it sits the more of the job becomes carpentry instead of windows.

This is the one symptom I would never tell anyone to sit on for a season.

2. The sash no longer closes or locks properly

Open it. Close it. Turn the handle. If it needs a shove, a lift, a knee, or a particular trick that only you know, something has moved: the frame has racked, the hinges have dropped, or the sash itself has warped.

Worth knowing before you panic: on a good window this is often an adjustment rather than a replacement. Quality hardware is designed to be shimmed and re-set as a house settles, which it always does. On a window where the hardware was never designed to be adjusted, the same problem is terminal. So the honest test is not “does it stick” but “can it be set right again”.

One exception that overrides everything: if it is a bedroom window and it cannot be opened, that is an egress and safety problem, not a comfort problem. Deal with it now.

3. Water coming into the room

Not condensation on the glass. Actual water: staining on the wall below the sill, paint blistering, a damp patch that shows up after wind-driven rain or after the snow melts on a warm afternoon.

That is water getting past the assembly. Usually it's the seam around the window rather than the window itself, which is why somebody has to open it up and look. Ignoring it is the expensive option, because it stops being a window problem and becomes a wall problem.

4. Broken glass, or a failed sealed unit that can't be replaced

Cracked glass is not a judgement call. A failed sealed unit, the milky fog or the film that lives between the panes where you can't wipe it, is a judgement call, and it turns on one question: can the glass unit be taken out and a new one put in, or is it built so it can't be?

If the glass can be changed, this is glass work, not a new window. If it can't, the whole window goes because a pane of glass failed. Worth reading the longer version on foggy windows between the panes before anybody quotes you a full replacement for this.

5. Nobody makes the parts any more

A dropped hinge, a broken handle, a cracked locking mechanism, a seal that has gone hard and flat. Every one of those is a part. If the part exists, you buy it and the window carries on. If the manufacturer has gone or the system was never built to be serviced, then a five-dollar failure has just written off the whole window.

That is the real difference between a window that lasts and a window that runs out, and it has nothing to do with how it looks.

The four that look like failure and usually aren't

This is where most of the money gets spent unnecessarily, so read this part slowly.

Water on the inside of the glass

Almost always your indoor air, not a broken window. In a cold climate the glass is the coldest surface in the room, so that is where the moisture in your air condenses first. It tells you about humidity and airflow far more than it tells you about the window. Where the water sits changes the answer completely, and that is a whole guide on its own: why windows sweat in winter.

A cold feeling near the window

Feeling cold when you sit near glass is not the same as air leaking past it. Cold glass pulls heat off you by radiation even when the window is perfectly sealed. To find out which one you have, wait for a genuinely cold day and run the back of your hand slowly around the perimeter: corners, then along the bottom, then up the sides. Moving air means a draft, and a draft is a seal or an installation problem. Cold glass with no moving air is a glazing question.

They lead to very different quotes.

The draft that is not the window

A window can be perfectly sound and still leak, because the leak is in the seam between the frame and the wall, hidden under the trim. That is a fault in the installation rather than in the product, and replacing the window without fixing the seam gets you the same draft in a nicer frame. If you want to know what a proper one looks like, that's covered in how windows actually get installed.

Dated, ugly, or the wrong colour

A legitimate reason to replace a window. Just call it what it is. If the window is sound and you want it gone because you cannot stand looking at it any more, that's your money and your house, and I'll happily do the work. What I won't do is dress it up as a performance problem so the decision feels more responsible than it is.

Read your symptom in one table

The three-minute walk-round you can do yourself

You do not need me for this part, and you should not need anybody's permission to know the state of your own house. Take three minutes per window.

1. Push. Thumb into the frame at the bottom and both bottom corners, inside and out. Firm everywhere, or soft somewhere?
2. Operate it. Open, close, lock. Does it move the way it was meant to, or does it need the trick?
3. Look under the sill. Staining, blistered paint, a tide line on the wall. Water leaves a record.
4. Look at the glass, then between the panes. Wipe it. If the haze is still there after wiping, it is inside the unit.
5. On a cold day, feel the perimeter. Back of the hand, slowly, corners first. You are feeling for movement, not temperature.
6. Ask the parts question. Find the maker's name on the frame or hardware and see whether replacement parts are still sold. This single question decides most repair-or-replace arguments.

Do that on every window and you will find, most of the time, that the house does not have a window problem. It has one or two bad windows and a lot of perfectly fine ones. Which is a much cheaper sentence to hear.

Serviceable or disposable: the question underneath all of this

Notice how many of the answers above turned on the same thing: can this part be replaced?

That is not a coincidence. A window is a frame, a glass unit, hardware and seals, and every one of those has a service life shorter than the frame's. If each of them can be bought and changed, a failure is maintenance. If they were built as one throwaway assembly, every failure is a new window.

Whole product categories are built the second way, and it isn't an accident. It's a business model. Nobody advertises it, because the whole point is that you only find out on the day the handle snaps.

So when you eventually do replace something, ask that question before you ask about the price: which parts of this window can I buy separately in fifteen years? A supplier who has a real answer is telling you what they built. One who changes the subject is telling you that too.

The systems I install are built to be taken apart. Glass units come out and go back in, hinges can be re-set as the house settles, seals and hardware are stocked commercial parts. That is the actual argument for them, and it is the only one I make.

And the most funny thing: in my own quotes it lands at about the same money as a comparable Canadian window. Don't take my word for it. Take any number of quotes you like and compare them yourself. You will be pleasantly surprised.

When “not yet” is the wrong answer

I say “not yet” a lot. It costs me work, and I say it anyway. A homeowner who trusts what I told them about the window that was fine will call me back about the one that isn't.

But “not yet” is wrong in four cases, and I will say so just as plainly:

• Rot. It never waits for you, and it charges interest in carpentry.
• Water entering the wall. Same reason. Today it's a window. Later it's a wall.
• A bedroom window that won't open. That's somebody's way out of the house in a fire.
• Broken glass. Safety, and it's not going to heal.

Everything else can usually wait for the right season, the right budget, or the right order — which is its own decision, covered in all at once or one at a time.

What I'll tell you if you call

I'll come and take an honest look, one window at a time, and tell you which ones are failing and which ones aren't. If nothing is failing, that's what I'll say, and it costs you nothing to hear.

I would rather lose a job to the truth than win one because you didn't know which questions to ask.