This is the question you need to ask your client before talking about product features. It is important to understand why your customers wants to buy a garage door if you want to provide them with the right advice. The following list will help you to pinpoint the exact need:
1) Find out about the project
a. New house or renovation?
b. The garage fits one or two cars?
c. If it's a garage for two cars, one double or two single doors?
d. What budget is allocated for purchase?
2) About the garage
a. Is it attached to the house?
b. Is it detached?
c. Is it heated? Will it be used for activities other than parking a car?
d. Is it underneath the house? Is there an entry door to or for the garage?
e. Is there a room above the garage?
f. Is there a garage door opener? Does it need to be replaced?
g. Should the door provide added security against theft?
3) Importance of aesthetics
a. Do they want to improve their home's curb appeal?
b. What style is the home: colonial, contemporary, modern, etc.
c. Are they planning on changing the style of the home?
4) Specific needs
a. Door model and color
b. Windows
c. Garage door opener
d. Related work needed (e.g. door framing)?
e. Installation: specialist or do-it-yourself?