Windows & Doors
Windows and doors,
properly installed.
A window or door is only as good as its installation. Oslick installs replacement windows, exterior doors, and historic replacements across Philadelphia — fitted, flashed, and sealed so they perform for the long haul and cut energy loss.
New windows and doors can transform a home's comfort, efficiency, and appearance — but only when they're installed correctly. Poor flashing and gaps are the leading cause of drafts, leaks, and premature failure. Oslick installs to last, with proper sealing and trim integration.
We handle replacement windows, exterior and entry doors, energy-efficient upgrades, and historic replacements where matching the original profile matters. On older Philadelphia homes, we take care to keep new units true to the character of the facade.
Because we're a full renovation contractor, we can also repair the rough openings, framing, and masonry around a window or door when it's needed — so the new unit sits in sound structure, not a compromised opening.
What's Included
- Replacement windows
- Exterior and entry doors
- Energy-efficient upgrades
- Historic window and door replacements
- Rough opening and framing repair
- Flashing, sealing, and weatherproofing
- Trim and finish integration
- Masonry repair around openings
Common Questions
About windows and doors
Should I repair or replace my windows?
It depends on the condition and whether the home is historic. We'll assess your windows and recommend repair where it makes sense and replacement where it's the better long-term value.
Can you match historic window styles?
Yes. For period and historic homes we source or build replacements that match the original profiles so the facade keeps its character.
Will new windows actually lower energy costs?
Properly installed, efficient windows and doors reduce drafts and heat loss. Just as important as the unit is the installation — gaps and poor flashing undo the benefit, which is why we focus on getting the install right.