Home › Blog › What your commercial roof warranty requires you to do each year — the owner's side of the deal
What JM, IKO, Mule-Hide and Duro-Last owner guides ask building owners to do to keep a commercial roof warranty valid, and which parts your own team can do.
Most boards file the roof warranty and forget it until the first leak. Then they find the warranty is a contract with duties on both sides. The manufacturer agrees to pay for certain leak repairs. The owner agrees to maintain the roof, report problems quickly, and ask permission before anyone changes it. The commercial roof warranty maintenance requirements are the owner's half of that bargain, and they are where most denied claims start.
This post sets out what four manufacturers' published owner guides actually ask for, turns them into a yearly calendar, and marks which parts your facility team can do from a desk, a window or the hatch landing. It does not replace your own warranty document. The terms vary by manufacturer, product and warranty version, so read the one with your building's name on it.
Johns Manville puts it plainly in its owner's manual: JM pays for repairs to stop leaks from natural deterioration of the guaranteed materials or poor workmanship. In return, the owner agrees to properly maintain the roof and to notify JM in writing of any defects or proposed changes (JM Owner's Manual). Mule-Hide's care guide adds that the manufacturer's warranty is not a maintenance program or agreement, and that inspecting and maintaining the roof is the building owner's responsibility (Mule-Hide).
That leaves four duties that show up again and again:
The table compares the published owner guides we could read in full. These are general guides and sample forms, not your warranty. Where your document says something different, your document wins.
| Manufacturer (document) | Inspection frequency | Leak report window | Changes to the roof |
|---|---|---|---|
| Johns Manville (Owner's Manual) | Checklist items at least twice a year | Contact Owner Services within 30 days of discovering the leak | Modifications by a Peak Advantage contractor; notify JM ahead of time, including before solar |
| IKO (InnoVIT TPO owner's guide, Diamond Shield warranties) | At least quarterly, and after any major weather event | Report suspected leaks within 30 days of discovery | Contact IKO before new penetrations, curbs, rooftop units, pavers, green roofs or solar |
| Mule-Hide (Care and Maintenance Overview) | At least twice a year, spring and fall, and after every major storm | Call as soon as possible, then written notice per the warranty terms | Prior approval for changes; roofing work by a Mule-Hide Warranty Eligible Contractor |
| Duro-Last (Care and Maintenance Guide) | At least twice a year, spring and fall, and after severe weather; some warranties require Duro-Last inspections in set years | Sample forms set 72 hours, 7 days or 14 days, depending on the warranty | Notify in advance of a change in building use; repairs by an authorised contractor with Duro-Last materials |
Two things stand out. First, the report window ranges from three days to a month, so nobody should assume. Second, Duro-Last's guide says some of its warranties require an inspection by its own quality assurance representative in particular years. Its sample forms list years 10, 15 and 20 for some warranties and years 15 and 18 for another (Duro-Last). Missing one is a different problem from skipping a routine check.
JM's guarantee summary lists what is not covered. It includes damage from foot traffic, stored material or physical abuse; condensation; ponding water on most systems; damage from new installations on, through or next to the membrane; changes of use, including solar and vegetative overlays, unless JM approved them in writing; and repairs to the membrane made after completion except by an approved JM contractor in a way JM accepts (JM RS-7396). Damage to the building or its contents is also excluded. Roof coatings are maintenance items that the owner recoats as needed.
Mule-Hide is just as direct about sealants. Exposed mastics and sealants, including pitch pan and metal flashing sealants, are required maintenance items for the owner to remediate. If a reported leak turns out to be outside the warranty, the owner pays for the investigation and repair (Mule-Hide).
In practice, that makes the records and the approvals the real protection. The roofer can fix a seam. Nobody can go back and approve an HVAC curb that was cut in two summers ago.
This calendar works for most DMV buildings. Fit it to whatever your warranty actually says.
| When | What happens | Who does it |
|---|---|---|
| January | Pull the warranty, find the report window and any required-inspection years, and put them on the facilities calendar | Facility team |
| Spring (March–April) | Inspection after the freeze-thaw season, with written and photo report | Authorised roofer or trained inspector |
| Before any rooftop project | Alteration or modification request to the manufacturer; written approval on file before work starts | Facility team files; roofer and manufacturer approve |
| After any severe storm | Interior check and safe-viewpoint photos; roofer inspection if anything looks wrong | Facility team, then roofer |
| Within the report window of any leak | Written notice to the manufacturer, with the warranty number, location and site contact | Facility team or property manager |
| Fall (October–November) | Inspection before winter, drains cleared, written and photo report | Authorised roofer or trained inspector |
| Year-end | Access log, photo log, reports and invoices filed with the warranty | Facility team |
| Required-inspection years | Manufacturer inspection booked well ahead | Facility team books; manufacturer inspects |
Late October is the right moment for the fall line and for the January line done early. If you don't know your report window today, that is the first thing to fix.
Most of the owner's duties are paperwork, and none of it needs anyone on the roof.
Duro-Last's guide suggests keeping the warranty, inspection reports, repair and maintenance bills, and the original drawings, specifications and invoices together. The same file answers the first questions any manufacturer will ask. Our roof photo log guide shows how to add dated photos taken from safe positions.
IKO asks owners to record everyone who goes on the roof, with date, time and work performed, and says the record helps find when and how a leak started. Mule-Hide recommends the same. Our contractor roof access policy post has a log you can adopt.
Write the manufacturer's warranty phone number or email, the warranty number and the report window on the leak-response card at the front desk. When a leak happens, the first-hour leak checklist covers containment, and the warranty notice goes out the same day.
No new unit, curb, antenna or solar array goes up until the manufacturer's written approval is in the file. Make it a line in your purchasing checklist.
Check drains, ponding and debris only from a window or from the hatch landing, without stepping out. Anyone who goes onto a low-slope roof is covered by OSHA's 29 CFR 1910.28(b)(13): fall protection within 6 feet of an edge, and protection, a designated area or an enforced work rule farther back. Skylights count as holes. The full table is in our fall roof maintenance checklist. Never open the hatch in wet, frosty, snowy or windy weather. Electrical, gas and HVAC work goes to licensed trades.
The inspections the guides call for, sealant renewal, clearing debris at the roof edge, and every repair belong to an authorised roofer. Some guides mention temporary repairs. Don't have staff patch, seal, tarp or probe the membrane. An unauthorised repair is one of the listed ways to lose coverage, and it puts people on the roof in the worst weather. Call the roofer when:
Our roof maintenance programmes are built around these calendars, and commercial roof repair covers the fixes that follow.
It depends on the manufacturer. The JM, Mule-Hide and Duro-Last guides call for at least twice a year, spring and fall, plus after severe storms. IKO's TPO guide says at least quarterly. Some Duro-Last warranties also require a manufacturer inspection in set years. Your warranty document is the authority.
The guides we read range from 72 hours to 30 days, and some require written notice. Find the window in your own warranty now, not during a storm, and send the notice in writing even if you also phone.
It can, if the manufacturer did not approve it first. JM, IKO and Mule-Hide all ask for notice or approval before new equipment, penetrations or solar, and want the flashing done by an authorised contractor.
Usually the owner. Mule-Hide and Duro-Last both say the owner pays for the investigation when the problem falls outside the warranty, so a good log of rooftop work can save that bill.
Not automatically, for the manufacturers we checked. JM and Duro-Last may approve a transfer, often after an inspection and any outstanding repairs.
If you are not sure what your warranty asks of you, or whether past work has put coverage at risk, a written condition report sets out where you stand. Book a free 30-minute consultation at https://dmvcommercialroofing.com/#book or call 202-798-7663.
Header photo: xb100 / Magnific.
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