Therma-Tru fiberglass exterior entry doors are engineered for performance in Canadian climates, combining a pressure-injected polyurethane foam core with a compression-moulded fiberglass skin. Unlike wood, fiberglass will not warp, rot, or crack through freeze-thaw cycles. Unlike steel, it will not dent or rust. The polyurethane foam core provides approximately four times more insulation than a wood door.
Features
- Compression-moulded fiberglass -- will not warp, rot, dent, or rust
- Polyurethane foam core provides approximately 4x more insulation than a wood door
- AccuGrain wood-grain texture accepts stain for a realistic wood appearance
- Smooth models accept paint without priming
- ENERGY STAR qualified configurations available
- Limited lifetime warranty on fiberglass door slabs
Specifications
| Material |
Compression-moulded fiberglass with polyurethane foam core |
| Heights |
6'8" standard; other heights by special order |
| Widths |
32", 36" standard; other widths available |
| Finish Options |
Smooth paintable; wood-grain stainable (Fir, Mahogany, Oak, Walnut) |
| Core |
Pressure-injected polyurethane foam -- approx. 4x more insulation than wood |
| Warranty |
Limited lifetime (fiberglass slab); 10-year (steel components) |
Common Uses
Therma-Tru fiberglass entry doors are used as primary entry doors and secondary exterior doors in residential construction and renovation. They are particularly well suited to Canadian climates where extreme temperature swings and freeze-thaw cycles cause significant problems for wood and steel entry doors.
Pro Tips
- Allow the door surface to reach room temperature before staining or painting in cold weather -- applying finish below 10 degrees C can result in adhesion problems.
- Wood-grain Therma-Tru doors can be finished with any exterior-grade gel stain -- test the stain colour on a sample piece first as fiberglass accepts stain differently than real wood.
- Install the door system with proper sill pan flashing at the threshold to prevent water infiltration at the most vulnerable point of the entry system.
Frequently Asked Questions
How does fiberglass compare to a steel entry door?
Fiberglass is more resistant to denting and will not rust, making it better suited to coastal and high-humidity environments. Steel provides slightly better security at a lower price point. Both significantly outperform wood for maintenance requirements in Canadian climates.
Can a Therma-Tru door be stained to look like real wood?
Yes. Wood-grain Therma-Tru doors are specifically designed to accept exterior gel stain. The AccuGrain texture replicates the depth and variation of real wood grain very closely.
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