Not every opening is a standard rectangle. Custom window installation covers made-to-measure units for arched, circular, triangular, and oversized openings, as well as historically accurate profiles for older Marietta homes. We field-measure precisely, order to exact spec, and install so specialty shapes seal and operate as well as any standard window. If you’ve been told an opening is “too unusual,” it usually just needs a custom order.
Benefits of Custom Window Installation
- Windows built to your exact opening — any size or shape
- Arches, circles, trapezoids, and transoms
- Historically accurate profiles for older homes
- Precise field measurement eliminates gaps and rework
- Matches new units to your home’s existing style
Our Installation Process
Every custom window installation project follows the same proven, AAMA-standard process — the details that keep water out of your walls and your manufacturer warranty valid.
- Precise field measurement of every opening
- Careful removal of the old window (EPA Lead-Safe on older homes)
- Inspection and prep of the rough opening
- New unit set level, plumb, and square
- Low-expansion insulation and correct flashing
- Interior and exterior sealing, trim, and cleanup
See exactly how window installation works →
What Affects the Cost
Pricing is quoted per project after an in-home measurement. The main factors:
- Window size and quantity
- Frame material (vinyl, wood, fiberglass, aluminum)
- Glass package (Low-E, argon, dual vs. triple pane)
- Insert vs. full-frame installation
- Custom shapes, capping, and permits
Read the full window replacement cost guide →
Custom Window Installation FAQs
Can you match windows in an older or historic home?
Yes. We measure and order custom units that replicate original sight lines, grille patterns, and proportions so replacements look original to the home.
Do custom windows take longer to get?
Custom orders typically take a few weeks longer to manufacture than standard sizes. We give you a realistic timeline up front and confirm measurements before ordering.