A female monarch lays its eggs (1) on a sprouted milkweed plant. The eggs hatch in four to five days producing tiny yellow, black and white banded larvae (caterpillars). These caterpillars (2) will feed solely on milkweed and eat enormous quantities because they are growing fast.
Roll-up door spring repair or replacement is usually around $200 - $250 for a 2 car door. If the brackets need to be disassembled to remove the springs due to the shaft not sliding sideways enough it will cost you an additional $50 - $100.
On average, the cost for a professional to replace broken garage door springs is $200 to $300. Usually only one spring is going to break at a time, but you want to replace them as a pair, says Doug Berlin, owner of Above the Rest Garage Doors in Kissimmee, Florida. If one is broken, the other one is not far behind.