Are the insulated garage doors all the same? Of course not ! The thermal resistance factor of a garage door means little if the door is not provided with effective thermal breakage and appropriate weatherstripping around the entire perimeter and between the door sections. Without these sealing characteristics, cold and heat will reduce the energy efficiency of the door.
Wood panel caps (sections)
- The section tip is the part that connects the outer sheet of the door to the inner one. To connect everything, there is a weatherstrip or an adhesive seal that connects the two sheets.
- Many garage door manufacturers manufacture garage door sections in length which they then cut to obtain the necessary door width. To close the section ends, they install steel caps.
- Garaga uses a different manufacturing technique, where each section is made one at a time. Wooden end caps are used to avoid ending up with a thermal bridge. These wooden tips do not lead the cold to the inside of the garage, unlike the steel caps.
Joints between sections
- Joints between sections are another thing to look at closely. To join the outer sheet to the inner sheet, some manufacturers use only a steel pin, with or without glue.
- Garaga uses PVC weather stripping with triple contact thermal breakage . The outer sheet is not in contact with the inner sheet and thus, the cold is not led to the inside of the garage.
Weather-stripping of the exterior framing
- Most manufacturers offer PVC weatherstripping whose quality is only measured when placed in a freezer for 48 hours. They become hard and lose all flexibility.
- Garaga uses a higher quality PVC, including the double-blade weatherstrip, which remains flexible even at -25 ° C (-15 ° F).
U-shaped door sill weatherstripping
- Like framing weatherstripping, the quality of a weatherstrip weatherstrip is measured by its flexibility during cold periods.
- Garaga uses an elastomeric (not PVC) thermoplastic weatherstrip that remains flexible even at -52 ° C (-52 ° F).
What to remember from all this?
- When evaluating the energy efficiency of a residential garage or commercial building, it is important to look closely at the construction of garage doors. Door insulation is important, but it is not the only factor to consider.
- Although different garage doors have the same insulation factor R, they are not necessarily equivalent. The “R” value does not take into consideration the heat (energy) losses from the joints between the door sections, the bottom panel weather strip and the outside perimeter of the door.
Contact a real garage door specialist in your area. He knows garage doors more than anyone. He will be able to advise you and present you the best possibilities according to your needs, even if they are very particular.