Portage Ave foggy sealed unit repair — done right for our winters

Fog or moisture between the panes means the sealed glass unit has failed. We replace just the sealed unit and keep your existing frame — a fraction of the cost of a new window.

Every opening measured on-site

Full air-seal on every unit

Written frame + sealed-glass warranty

Fog means the seal failed

When you see haze, condensation or a milky film trapped between the panes that will not wipe off, the sealed glass unit has failed — the edge seal let go and the insulating argon escaped, so moist air gets in and fogs the glass from the inside. It is annoying to look through and it means that pane has lost most of its insulating value, but the good news is that the frame and sash are almost always still fine.

That is the key point: a fogged window is usually a glass problem, not a whole-window problem.

We swap in a new sealed unit sized and glazed to match, which restores the clear view and the efficiency without the cost of a full replacement.

From free estimate to installed — in four simple steps

Book the estimate

Call, text or use the form. We book a free in-home visit — no obligation, no high-pressure sales table.

On-site measure

We measure every opening, check the frames and sills for rot or water damage, and walk through material, style and glass options in plain language.

Written quote

Line-item quote with the window line, glass package, U-factor, warranty and haul-away on one page. Financing attached when you want it.

Install, cleanly

Drop cloths, boot covers and a full air-seal on every unit. Old windows hauled away and a walkthrough of your new windows plus warranty registration.

Save the window, lose the fog

Replacing just the sealed glass unit is far cheaper than a whole new window and brings back both the clarity and the insulation the failed unit lost. It is one of the most cost-effective repairs we do.

We measure the unit, match the glass type and glazing — double- or triple-pane, Low-E, the right spacer — to your existing windows so the repaired one looks and performs like its neighbours, then seal it in properly and back the work with warranty.

Foggy Sealed Unit Repair questions answered

Why glass fogs, cost and whether every unit can be fixed.

Why is my window foggy between the panes?

The sealed unit — the two or three panes bonded around a spacer to trap insulating gas — lost its seal, usually from age, heat cycling or a manufacturing flaw. Once the seal fails, the argon escapes and humid air seeps in, and when that air cools it condenses into the fog you see between the panes. It cannot be cleaned or dried out, because the moisture is sealed inside the glass unit; the unit itself has to be replaced. The frame around it is typically fine, which is why this is a repair, not a replacement.

Do you replace the whole window?

Usually not. In most cases we replace just the sealed glass unit and keep your existing frame and sash, which costs a fraction of a whole new window and solves the problem completely. The frame is rarely the issue when a window fogs — it is the glass unit that failed. We only recommend a full replacement if the frame or sash is also rotted, drafty or damaged, in which case we will show you the numbers both ways. For a simple fogged pane in a sound frame, a unit swap is the smart fix.

Can every foggy window be fixed this way?

Most can. If the frame and sash are sound — which they usually are — we can replace the fogged sealed unit and keep the rest of the window, whatever the style. The exceptions are windows where the frame or sash is also failing, or a few older or specialty units where a matching sealed unit is hard to source; in those cases we will tell you honestly and lay out the options, including a full replacement if it makes more sense. We check the whole window at the measure, not just the glass, before we quote.

How long does a sealed-unit replacement take?

We measure first, order the matching glass unit, then swap it in once it arrives — usually a quick single visit for a standard size.

Will the new glass match my other windows?

Yes — we match the glass type, coating and spacer so the repaired unit looks and performs like its neighbours.

Book a free Portage Ave foggy sealed unit repair estimate

Foggy window? Book a free measure and a written quote for sealed-unit repair anywhere across Portage Ave and the surrounding towns — a new glass unit matched to your window that clears the fog and restores the insulation, for a fraction of a full replacement. Done by our own crews, no subcontractors, no pressure.

Locally owned · Insured · ENERGY STAR® · Free written estimates

Real Portage Ave reviews

What Portage Ave homeowners say about us

★★★★★ 4.9 · 118 reviews on Google

★★★★★

Three windows had gone cloudy between the panes. They swapped just the sealed units and kept our frames — saved us a fortune.

C. Bergeron

Homeowner, Portage Ave

Explained the seal had failed and we did not need whole new windows. Clear glass and insulation back in one visit.

S. Aujla

Honest repair over a needless replacement. Matched the glass perfectly and the fog is gone.

J. Fortin

Fast, fairly priced and no upsell. The view is crisp again and the room warmer.

P. Nkemelu

Portage Ave foggy sealed unit repair — done right for our winters

Fog means the seal failed

From free estimate to installed — in four simple steps

Book the estimate

On-site measure

Written quote

Install, cleanly

Save the window, lose the fog

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Sash Repair

Foggy Sealed Unit Repair questions answered

What Portage Ave homeowners say about us

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Book a free Portage Ave foggy sealed unit repair estimate