Manufacturer
Therma-Tru entry and patio doors
Therma-Tru is a door-only manufacturer that helped establish fiberglass as an entry-door material. Its slabs take a paint or wood-grain stain finish, resist denting and do not rust or rot, and its door systems bundle the slab, frame, sill and weatherstripping as an engineered unit.
Window Inserts & Therma-Tru
Window Inserts installs Therma-Tru on entry-door and patio-door replacements where a fiberglass system is the right call. As with any door, the fit and the sill detail are where the performance is won or lost, and that is our part of the job.
Product families
Listed from public Therma-Tru sources · confirm the current offering at your consultation.
- Fiberglass entry door systemslisted
Smooth and wood-grain fiberglass slabs with matching frames, sills and glass options. Confirm current collections and glass at your consultation.
- Fiberglass patio doorslisted
Hinged (in-swing/out-swing) patio door configurations.
We do not reproduce Therma-Tru’s specifications, prices, energy ratings or warranty terms here — those live on Therma-Tru’s official site. The useful next step is a free estimate, where we match a line to your home.
Next step
A better view starts here.
Tell us what's going on with your windows or doors. We'll come look, measure, and give you honest pricing — free, and no obligation.
Free in-home estimate · Westchester · Putnam · Fairfield