Commercial Roof Warranty Types: NDL, Material-Only, and Labor Explained

The Three Warranty Tiers

Every commercial roofing warranty falls into one of three categories. Material-only: the manufacturer replaces defective materials but you pay all labor and removal costs. This is the base warranty that comes with every membrane purchase and costs nothing extra — it sounds good until you try to use it. Labor and material: covers both the membrane and the installation labor, typically up to a dollar limit. NDL — No-Dollar-Limit: the manufacturer pays every penny of repair, no cap, for the full warranty term. NDL is the one you want. It's also the one that requires you to use a manufacturer-certified contractor.

What NDL Actually Covers

An NDL warranty covers leaks caused by material defects and workmanship failures in the roofing system. What it doesn't cover: storm damage (hail, wind), damage caused by others (HVAC contractor, telecom company making unauthorized penetrations), ponding water that persists more than 48 hours, and failure to maintain the roof per the manufacturer's requirements. In DFW, storm damage is common — so NDL should be understood as protection against the roof itself failing, not protection against a 3-inch hailstorm. Your commercial property insurance covers storm damage.

How Long Should Your Warranty Be?

For most commercial buildings in DFW, a 15- or 20-year NDL warranty is the right balance of cost and coverage. Ten-year NDL warranties cost less but are typically about 40% of the roof's expected life — you're uncovered for the back half. Thirty-year NDL warranties cost more and make sense for institutional-quality buildings or facilities that are difficult to re-roof (occupied healthcare, data centers). The warranty period is not the same as the expected roof life — a 20-year NDL warranty on a 25-year roof just means the last 5 years you're on your own.

Keeping Your Warranty Valid

Here's what voids more commercial roof warranties in DFW than anything else: an HVAC company cutting a curb opening without coordinating with the certified roofer, and nobody documents it. The next time there's a leak near that penetration, the manufacturer inspects and finds a non-compliant penetration — warranty void. JRH sends every commercial maintenance contract customer a one-pager: "Before anyone cuts your roof, call us first." Simple rule that saves warranty coverage worth tens of thousands. Call us at (469) 888-6903 for warranty documentation on your existing roof.