Before or after
Frozen pipes versus winterization
Winterization is the work you do so a pipe does not freeze. Frozen-pipe repair is the visit after it has frozen or split. Booking the wrong one wastes the emergency.
If water is on the floor, use frozen pipe repair. Close the indoor shutoff if you already know it. Do not use a flame. Do not operate a utility's street valve. Castle Rock tells its customers to call 720-733-6000 for the curb. If the house is empty next month and nothing is leaking today, use winterization: hoses off, a plan for heat or a drain-down, irrigation only if it is in the quote.
Neither page is a gas-line manual.
Questions to settle first
The pipe is spraying. Which page?
Frozen pipe repair. Stop the water at the indoor shutoff if you can, and call a plumber. Winterization will not close a split. Do not thaw it with an open flame. Ask them to write that limit into the quote before you compare it with another company.
I am leaving the house empty in January. Which page?
Winterization, before you go. Ask what will be drained and whether the heat stays on. A burst while you are gone becomes the repair page, after the fact. Ask them to write that limit into the quote before you compare it with another company.
Does one visit do both?
It can, if the quote says the burst is repaired and the other exposed lines are protected. Those are two scopes. A drain-down does not patch a hole, and a patch does not disconnect the garden hose. Ask them to write that limit into the quote before you compare it with another company.