Adding Space, Adding Windows
Building a home addition is exciting, but it also means making important window decisions. Unlike replacement projects, new additions give you freedom to choose the perfect windows from scratch—if you know what to consider.
Starting with the Big Picture
Match or Upgrade?
First decision: match existing windows or upgrade?
Match existing:
- Consistent appearance
- Familiar operation
- Similar maintenance
- May limit options
Upgrade:
- Better efficiency
- Modern features
- Consider future replacement of original windows
- May look different
Consider the Room Function
Think about how you’ll use the space:
- Bedroom: Privacy, egress, comfort
- Family room: Views, light, entertainment
- Kitchen: Ventilation, task lighting
- Home office: Glare control, quiet
- Sunroom: Maximum light, heat management
Sizing and Placement
Take Advantage of New Construction
Additions allow optimal window placement:
- Design for views
- Maximize natural light
- Consider sun angles
- Plan for furniture placement
Structural Considerations
Work with your contractor on:
- Header sizes for wide openings
- Structural support for glass walls
- Foundation for heavy window assemblies
- Rough opening dimensions
Code Requirements
Don’t forget building codes:
- Egress requirements for bedrooms
- Energy code compliance
- Safety glazing locations
- Ventilation requirements
Choosing Window Styles
Popular Options for Additions
Picture windows:
- Maximize views
- Best energy efficiency
- Combine with operable windows
Casement windows:
- Excellent ventilation
- Tight seal
- Work well in groups
Large sliding doors:
- Indoor-outdoor connection
- Maximum opening
- Contemporary appeal
Creating Window Walls
Additions often feature window walls:
- Multiple units mulled together
- Combination of fixed and operable
- Dramatic impact
- Structural requirements
Energy Considerations
Orientation Matters
Different sides need different approaches:
- South: Balance heat gain and light
- West: Control afternoon heat
- North: Maximize light, less heat concern
- East: Morning light consideration
Glass Selection
Choose glass for your addition’s orientation:
- Low solar gain for west/south
- High light transmission for north
- Balance for east
Practical Decisions
Frame Material
Match existing or choose best option:
- Vinyl: Affordable, low maintenance
- Fiberglass: Premium performance
- Wood-clad: Traditional appearance
- Consider maintenance implications
Hardware and Operation
Think about daily use:
- Reach and operation height
- Cleaning access
- Screen requirements
- Security features
Finishing Details
Coordinate with addition design:
- Interior trim matching
- Exterior cladding coordination
- Color selections
- Grid patterns
Working with Your Team
Communicate Early
Share window preferences with:
- Architect/designer
- General contractor
- Window supplier
- Electrician (for placement of outlets/switches)
Timing Matters
Windows in construction:
- Order early (lead times vary)
- Install after framing, before drywall
- Coordinate with other trades
Budgeting Tips
Where to Invest
Spend more on:
- Large, prominent windows
- High-use areas
- Difficult orientations
Where to Save
Consider economizing on:
- Utility room windows
- Storage area windows
- Secondary bedrooms
The Bottom Line
Home additions offer a fresh start for window selection. Take advantage of this opportunity to choose the perfect windows for your new space, considering function, efficiency, and aesthetics from the ground up.