Foggy between the panes
Fogged-up glass between the panes? Replace the sealed unit, keep the frame
A full house puts a lot of water in the air. Cooking for a big family, laundry drying indoors and several people home all day add up, and on a cold morning it lands on the glass. That fog wipes off. Fog between the two panes of a double-pane window that stays put means the seal has failed. Usually the frame is fine and only the glass part, which pros call a sealed unit, needs replacing. We're a free referral service: we connect you with an independent local glass professional who confirms which it is and quotes the fix.
- The wipe test comes first
- Often new glass, same frame
- A measuring visit, then a fitting visit
The two-minute test
Inside the glass or on the room side? A two-minute test
Wipe the inside of the glass with a dry cloth, then look again from an angle.
Water or frost on the room side
It wipes off, then returns on cold mornings. Winter mornings here are cold and humid, and a busy household adds more: pots on the stove, back-to-back showers, laundry on a rack. Run the range hood and bath fans, open blinds at night, and try a dehumidifier. This isn't a failed seal.
Fog, streaks or haze between the panes
It won't wipe off from either side. It may come and go with the weather or leave a white film. Air has got past the edge seal, and the space won't dry out on its own.
Dew on the outside of the glass
Moisture on the outer pane on a damp morning is normal.
Why now
Why Brampton's 1981–2005 homes are hitting seal failure now
A double-pane window holds two sheets of glass apart with a spacer bar, sealed around the edge. The dry air inside keeps it clear and insulating.
Most Brampton homes went up after 1980, and the early 2000s were the city's busiest building years, so a great many original windows are reaching the same stage together. Sun and every swing across freezing work at the edge seal, and winters here cross that line on many days. Once moisture gets in, the fog gets worse, not better.
That doesn't mean every window is failing; one foggy window in a room of clear ones is normal. Springdale, where building began in the early 1990s, is squarely in this group. In Bramalea's older sections, a house may be on its second set of windows, and it's their age that matters.
The fix
What swapping the glass unit involves
Expect two visits: one to measure, and one to fit the glass once it's made. An adult should be home both times. If the window is in a basement unit or a tenant's room, give notice and pick a time that suits the tenant.
Measuring and ordering
The pro measures the glass, notes its thickness and spacer, and checks whether it must be tempered safety glass, which is often required beside a door. A photo of the stamp on the spacer bar helps match the old unit.
Removing the stops and resetting the glass
On fitting day the pro takes off the strips holding the glass in, called glazing stops, lifts out the old unit and sets the new one square on small blocks. The stops go back and the edges are sealed. The frame, trim and hardware stay put.
Low-E and argon options
A low-E coating reflects heat back into the room, and argon gas between the panes slows heat loss. Ask what fits your frame's depth, which matters on casement windows, and how each option changes the quote.
Glass or frame?
When the frame, not the glass, is the real problem
New glass fixes fog, not a failing frame. The pro checks the frame before ordering and should say plainly when the money is better spent on a replacement window.
New glass is enough
The frame is square and solid, the window opens and locks properly, and only one or two units have fogged.
The frame needs a look
Water sitting in the frame, cracked or warped corners, drafts around the edges, or a new unit fogging again soon after.
A new window may make more sense
Many units failing across the house, or a frame as old as the house. Our repair or replace guide sets out the checks.
Rebates
Does new glass in the old frame qualify for a rebate?
Usually not. Ontario's Home Renovation Savings program pays per rough opening for ENERGY STAR certified windows and doors, and windows generally go through a home energy assessment as part of two or more upgrades. New glass set into your existing frame doesn't fit that pattern.
That doesn't make it the wrong choice; with a sound frame, new glass is often the simpler fix. If several windows are going and you were already considering an assessment, price both routes. Check the program site for current rules before you decide.
What affects the quote
What affects the price of new glass
The pro will ask about:
- Size and shape, including arched foyer units and large family-room windows
- Double or triple pane, and any low-E coating, argon or tint
- Whether the glass must be tempered, for example beside a door
- Access: second-floor windows, tall foyers and basement units
- How many units are replaced in the same visit
- Whether the glass sits behind stops or the sash has to come off
A written quote should list each unit with its size and glass type.
Getting a quote
Getting a quote: photos of the spacer-bar stamp, sizes, location
Three photos do most of the work: the whole window from inside, a close-up of the fog, and the stamp on the spacer bar, the metal strip between the panes, which often carries a date or code. Add the rough width and height, which floor it's on, and whether it's in a basement unit.
You can send the request for your parents' home and be the contact, or as a tenant with your landlord's go-ahead. The pro we match you with should arrive when agreed, put down drop cloths and explain the plan to whoever is home. If the same window has a worn crank or torn screen too, mention it; see all window services.
Questions
Foggy window questions from Brampton households
Explore your options
Other window help in Brampton
Glass pros take foggy-window jobs across Brampton, including Springdale, Bramalea, Professor's Lake, Castlemore and Mount Pleasant.
Send a photo of the fogged pane and the spacer-bar stamp
Tell us which window and roughly how big. We'll pass it to a local glass pro. If the frame is sound and new glass will do, they'll say so.