Windows in Lakeway, Austin, TX

Why did this Austin home need new windows?

The existing units had lost their seal and were bleeding conditioned air. On a home in the 78738 hills, that means an AC that never quite catches up during a 100°-plus stretch.

• Old frames showed drafts and weak insulation values
• Cedar pollen and grit had worked into worn seals
• The homeowner came to us through a customer referral in early March

What did the crew find on site?

Most of the openings were straightforward, but the window above the entry told a different story. The stone-and-mortar surround had cracked and pulled away, leaving a gap that let heat and moisture into the wall. This is the kind of detail a rushed install papers over — a new sash goes in, the old failing mortar stays, and the leak just moves behind the trim. We flagged it during the measure visit and built a stone mortar repair into the scope before a single window came out. That surround now sits solid, and the seal around it will actually last.

• Entry window required a surcharge for its height and access
• Mortar repair was completed before the new unit was set
• A window technician measure fee covered the pre-build field measurements

What materials did we use, and why?

We went with the NT Windows Twinsulator Series for one main reason: its dual-pane insulated glass and rigid vinyl frame stand up to Central Texas heat cycles without warping. Vinyl doesn't conduct heat the way metal frames do, so your cooled air stays inside. NT Windows also builds locally, which shortens lead time and keeps replacement parts easy to source down the road. For sealing, we used OSI closed-cell spray foam around every rough opening — it expands to fill gaps but stays firm, so it won't sag or let cedar pollen and dust migrate through over the seasons.

• Sherwin Williams "Power House" caulk finished the exterior joints
• OSI foam cleaner kept the surrounds tidy for painting and trim
• Closed-cell foam adds a moisture barrier over limestone-soil humidity swings

How did the installation go?

The full replacement was completed on May 15, 2025. Our crew pulled the old units, prepped each opening, and set the new windows with foam and caulk.

• Delivery, install labor, and haul-off (dump) all handled
• No wall or trim rework needed beyond the entry-window mortar
• Site left clean, with old glass and frames removed

What were the results?

The home now holds its cooling better, and the previously drafty entry opening is fully sealed. The Sherwin Williams caulk lines give the exterior a crisp, finished edge.

• Tighter envelope for lower summer cooling strain
• Repaired stonework that no longer channels water into the wall
• Project closed out June 2, 2025