Windows
Warm Edge Spacer vs Aluminum Spacer: Does the Spacer Bar in Double Glazing Really Matter?
Yes—the spacer bar in double glazing matters. But it should not be treated as a magic component that can make an otherwise average window…
All Guides
Browse every JoWindows guide, comparison and practical article in one place. Newest guides appear first.
Glass & Glazing
Argon Gas in Windows: Is It Worth It, How Long Does It Last, and What Happens If It Leaks?
Argon Gas in Windows: Is It Worth It, How Long Does It Last, and What Happens If It Leaks? Argon-filled windows are not a…
Doors
Sliding vs French Patio Doors: Which Is Better?
Sliding patio doors are a practical starting point when you want to keep furniture close to the entrance or have limited space on a…
Buying Guides
Vinyl vs Wood vs Fiberglass vs Aluminum Windows: Which Frame Material Is Best?
A window frame material can tell you a lot about how a window is built. It cannot tell you, by itself, whether that window…
Buying Guides
Vinyl vs Fiberglass Windows: Quick Comparison
Vinyl and fiberglass can both make excellent window frames, but they solve the buying problem differently. Vinyl usually wins on upfront price, availability, and…
Glass & Glazing
Window STC vs OITC: Which Rating Matters for Traffic, Aircraft & Street Noise?
If you are replacing windows because of highway traffic, trucks, trains, aircraft or persistent urban rumble, OITC is usually the more relevant single-number rating…
Windows
Window Weep Holes 2026 Guide : How to Clean, Test & Fix Drainage
Window weep holes are intentional drainage openings, not gaps or defects that need to be sealed. They allow rainwater and other moisture that reaches…
Installation & Maintenance
Foggy Double-Pane Windows: Replace the IGU or Whole Window?
Fog trapped between two panes does not automatically mean you need a whole new window. It usually means the sealed insulating glass unit —…
Windows
Egress Window Requirements Explained: Clear Opening, Sill Height & Rules by Country
An egress window is not defined by the size printed on a product label. What matters is the actual unobstructed opening available after the…
Glass & Glazing
Tempered vs Laminated Glass for Windows: Safety, Security, Noise & UV
The usual question — “Which is stronger, tempered or laminated glass?” — is not quite the right starting point. Tempering changes the strength and…
Glass & Glazing
Low-E Glass Explained: U-Factor, SHGC & Coating Surfaces
Two windows can both be described as “double-glazed Low-E” and still behave very differently in the same room. The coating, its solar-control characteristics, pane…
Installation & Maintenance
Window Condensation Explained: Inside, Outside, or Between the Panes—and What Each Means
Where condensation appears matters more than the fact that a window looks wet. Moisture on the room-side surface, dew on the exterior, and fog…