Guides

Short, practical explainers that go with our calculators.

DIY vs. Hiring a Pro: Where the Money Actually Goes
How installed prices split between materials and labor for common projects, and how to decide whether doing it yourself is worth it.
How to Measure a Roof (Without Climbing on It)
Estimate roof area and roofing squares from the ground using your home's footprint, overhang and pitch. Includes a pitch-factor table.
Material Waste Factors: How Much Extra to Buy
Why every material estimate includes overage, typical waste allowances by material, and when to go higher or lower.
Solar Payback in 2026 Without the Federal Tax Credit
The 30% residential solar credit ended for systems placed in service after 2025. Here is how that changes payback, with worked numbers.