When you replace your gutters in late summer, you get ahead of the heavy autumn storms that test every corner of your roofline. The work usually takes just a single day, and booking before the fall rush often means you can lock in contractors easier. Water stops spilling over your siding, pooling by your foundation, and turning your basement damp.
You want to get at least three quotes from local gutter pros so you are not overpaying. A typical US cost sits right around $2200 for standard seamless aluminum, but prices swing based on your linear footage and whether you have tricky corners.
That 0% intro window is a hard deadline, not free money, and any leftover balance after 15 months will get hit with standard interest.