Semi-annual and annual maintenance programs structured around manufacturer warranty requirements — documented inspections, minor repair inclusion, and the written record that keeps your NDL warranty active when you need it.
The most common reason manufacturer warranty claims get denied in Dallas is not installation defect — it is missing maintenance documentation. Every 20-year NDL warranty from every major manufacturer (Carlisle, GAF, Johns Manville, Firestone, Versico, Sika Sarnafil) requires documented periodic inspection by a credentialed contractor. The specific interval varies by manufacturer: Carlisle requires semi-annual inspection on NDL policies, GAF requires annual. Fail to document that inspection, and the manufacturer has a contractual basis to deny a leak claim — even if the leak is at a weld seam they warranted.
Our maintenance contracts are structured around each manufacturer's specific inspection and documentation protocol. We are not doing a generic roof walk — we are following the manufacturer's checklist, photographing every item they require, and submitting the documentation into the manufacturer's warranty management system (or retaining it in our documented file that we provide to you) in the format that survives a warranty claim review.
Most of our maintenance clients are building owners and property managers who either inherited a building with an existing manufacturer warranty they want to keep active, or who installed a new roof with us and want to maintain the warranty investment they made. We also run maintenance contracts on buildings with no active warranty — because a documented inspection record still has value for capital planning and for any future property transaction.
Field membrane: We walk the full membrane field systematically — not a spot-check, not a drone fly-over without a boots-on-roof follow-up. We note and photograph every blister, puncture, surface crack, and granule loss location. Membrane areas showing surface cracking or brittleness get flagged for action before the next freeze cycle.
Perimeter and flashing: Parapet wall base flashings, through-wall counter-flashings, and edge metal are the highest-failure-rate locations on any Dallas commercial roof. We inspect every linear foot of perimeter flashing, note any separation or open lap, and photograph against the roof plan so you have a location-keyed record. Parapet cap condition is inspected for blow-off risk — after the 2024 spring hail season produced 80+ mph straight-line winds across Collin and Dallas Counties, we added a specific cap-fastening check to every post-storm inspection.
Drains and penetrations: Every roof drain body, ring, and strainer is inspected for debris blockage and proper sealing. Every penetration boot, conduit sleeve, and equipment curb corner is checked for seal integrity. Clogged drains that produce ponding are documented for immediate clearing.
Semi-annual (spring and fall): Required by Carlisle, Versico, and several other manufacturers on 20-year NDL policies. Spring inspection covers winter damage — parapet cracking from thermal cycling, drain freeze-damage, and any membrane movement from the Blackland Prairie clay heave cycle that runs February through April. Fall inspection covers summer UV exposure and heat-stress damage, and confirms drain clearance before the freeze season.
Annual: Accepted by GAF, Johns Manville, and most 10-15 year NDL warranty structures. Typically scheduled in October — after the summer heat stress window and before the first freeze risk. October also follows the primary hail season (March-June in DFW), so any hail damage accumulated over the spring gets documented and repaired before winter.
Every maintenance contract we write includes an allowance for minor repairs identified during inspection — typically $500-$1,500 in materials and labor depending on the program tier. This covers drain debris clearing, penetration boot re-sealing, small membrane blisters, and minor parapet sealant repair. Anything that exceeds the allowance gets a separate written repair scope and your approval before work proceeds.
