Your competition is not another website, it is a canvasser already on the porch
In storm season the contractor standing in the yard has an advantage no amount of copywriting overcomes, and speed of response is the only counter.
Decide what your answer window is, then staff it. During and after a hail run, the difference between answering in two minutes and calling back tomorrow morning is usually the difference between an inspection and a card in the recycling.
Cover the hours homeowners actually call. Evenings after work and the first hour of the morning are when people who took a canvasser's card start dialing.
Give voicemail and text a script, not an apology. A message that names a callback window and asks for the address and roof age moves the conversation forward even when nobody picked up.
In the quiet months the pressure changes but the leak does not. Fewer calls means each missed one costs more, not less.