Milton Commercial Roofing: Plan for Scale and Access

Yes, and probably more carefully than many owners realize. Manufacturer warranties on TPO and other single-ply systems typically include conditions about annual documented inspections and timely reporting of defects. If those conditions are not met, the warranty may not respond when a claim is made. Beyond warranty compliance, new buildings are not immune to operational damage: tenants add HVAC equipment, run conduit through the membrane, and send service contractors onto the roof without briefing them on where not to walk. Annual inspections on new buildings identify those kinds of damage early, when repair is simple, rather than after they have been ignored through multiple seasons.

Start by mapping where the ponding occurs relative to the building's column grid and the drain locations for that section. A low area that is consistently wet long after surrounding areas dry is almost always served by a drain that is either restricted, improperly positioned or at a higher elevation than the surrounding membrane due to insulation compression. The evaluation should confirm that the drain itself is functional before concluding that the membrane or slope needs to be corrected. On a large building, it is also worth checking whether a neighbouring drainage basin is backing up through a shared overflow into the low area, this is less common but does happen on some older configurations.

Yes, with planning. The phase boundaries should align with fire walls, expansion joints or bay boundaries that divide the building into independent roof sections, and each phase should be small enough that it can be completed and made watertight within a single work shift. Crane and hoist positions must allow dock doors on the active end of the building to remain open and accessible during the entire project. If the facility operates overnight, confirm whether membrane-removal or torch work near occupied areas is compatible with the overnight activity, and adjust the schedule if necessary. The planning conversation should happen before the contract is awarded, not after mobilization begins.

It depends on the membrane and the warranty terms. Most major TPO and PVC manufacturers allow solar installations on warranted roofs provided specific conditions are met: approved attachment or ballast methods, maintained access to drains and overflows, and notification to the manufacturer before installation. Some warranties require the solar installation to be done by an approved contractor or to be reviewed by a manufacturer representative. Reading the actual warranty document, not a summary, and sending the solar contractor's installation plan to the manufacturer for review before installation is the right process. Discovering that the solar installation voided the warranty is a problem that is much easier to prevent than to resolve.

Walk the most likely access path from the roof hatch to wherever the contractor was working and look for punctures, abrasion marks, debris left on the membrane, any unsealed openings from conduit or cable penetrations, and any areas of membrane displacement from equipment or materials being set down. These checks take ten minutes and catch the kinds of damage that, if left unaddressed through a winter, become a significant repair or a warranty dispute. On a large roof, have the contractor confirm in advance where they will be working and what access route they intend to use, so the post-visit check can be targeted efficiently.

Have a qualified inspector assess membrane condition, seams, flashings, drainage and insulation, and ask for a remaining-life estimate with supporting evidence. A moisture survey can help identify hidden damage. Use the results to decide whether to maintain, partially repair or plan replacement.