Where garage door companies buy
Garage door companies usually become dealers for one or two door brands and buy springs and parts from a door distributor.
| Supplier | Type | What their own site says | Pro program |
|---|---|---|---|
| Clopay | Manufacturer | Garage doors sold through a dealer network, with a public dealer directory. | Ask at the counter |
| The Home Depot | Retailer | Calls itself the world's largest home improvement retailer, with more than 2,300 stores across North America. | Pro Xtra |
| Lowe's | Retailer | Runs MyLowe's Pro Rewards for small and mid-sized pros, with points from the first dollar spent. | MyLowe's Pro Rewards |
From each supplier's own site on the date in the sources; call your branch before you plan around it.
Your counter list
The items garage door companies buy every week, from the van stock on our tools list. Ask each supplier for a price on these first; they decide which account saves you the most.
| Item | Why it is on the list |
|---|---|
| Torsion and extension springs in common sizes | Same-day spring changes |
| Cables, drums and center bearings | Common repairs |
| Rollers, hinges and weather seal | Tune-ups |
| Opener sensors, remotes and keypads | Opener calls |
| Lubricant | Every service |
For the first order, price the starter kit too: winding bars sized for the cones you see; socket set, wrenches and an impact driver; locking pliers and c-clamps; multi-position ladder; multimeter; spring gauge and measuring tape; level and track tools; gloves and eye protection. Bigger purchases to price at a dealer or rental house: spring winding tool or power winder; door lift or second tech; trailer or high-roof van; welder.
Opening a trade account
Bring your business name, tax ID and license number, and a credit application if you want terms. The big-box programs are compared row by row on Home Depot Pro vs Lowe's Pro. For the tools themselves, the garage door tools list has prices read on the makers' own sites (Little Giant, Fluke).
When supplier prices change
Update your garage door price list the same week a supplier raises prices. In Koira, that price list is what your estimates are built from.
Sources
- Clopay: Dealers, checked October 9, 2026
- The Home Depot: About, checked October 9, 2026
- Lowe's: MyLowe's Pro Rewards announcement, checked October 9, 2026
Last checked October 9, 2026. This page is general information, not legal or tax advice. Rules change and differ by state and city, so confirm with the agency named before you act.