The warmer months of spring and summer are typically the most popular seasons for home improvement projects - including roof replacements. During these months, the weather is more predictable, and the longer daylight hours provide ample time for the contractors to work on your home. The pleasant weather also makes it easier to inspect and prepare the existing roof for replacement. However, it is also one of the busiest times of the year for an NH roofing contractor, so planning well in advance will prove to your advantage.