Metal retrofit roofing is a cost-effective way to restore an aging metal roof without the expense and disruption of a full tear-off. A Duro-Last® membrane system can be installed directly over the existing metal roof to help stop seam issues, fastener leaks, rust, corrosion, and cracks around penetrations while adding long-term, watertight protection. Insulation can also be added to create a flatter surface and improve the roof’s R-value.
A Duro-last membrane is mechanically fastened over the insulation
Another layer of insulation is added, if necessary, to ensure a flat surface and increase R-value.
A Duro-last membrane is mechanically fastened over the insulation
Metal retrofit roofing involves the installation of infill, then an overlay of insulation to create a flat surface for the single-ply roofing membrane. This process adds insulation value and avoids the high cost and risk of exposing your building and operations to “blue sky” by removing and replacing the existing metal.
The flexible single-ply membrane covers your existing metal roof, providing a dry, sound roof system. Also, an expertly installed membrane protects your metal roof from further corrosion.
This proven system provides a cost-effective, long-term means to end roof leaks and provides energy savings as a secondary, financial benefit to your business. Additionally, we have custom prefabricated flashings and deck sheets available to reduce on site labor, leaving more of your capital investment in the roof system, not in labor that drives away after your project is completed.
Allowing Sentry to install a membrane metal retrofit roof will reduce maintenance costs over time and are backed by manufacturer warranties to provide ease of mind in your investment.
As many of you know, the maintenance of metal buildings and roofs, particularly in the Midwest is challenging due to rain, temperature changes, and ice buildup, which can result in corrosion and interior leaks.
Additional damage to the metal roof is caused by constant movement of the metal due to temperature related expansion and contraction. If such damage is left unaddressed, leaks may damage inventory, equipment or supplies and be a hazard to staff, possibly causing major disruption or cost to your business.
Allow us to inspect your roof to prevent a failure or leak from causing an unplanned interruption to your business. We will inspect your facility to determine the nature of the problems, and help you determine what course of action may be needed, whether repair or re-roofing.
A like-for-like membrane replacement gets you another 15–20 years before you’re back at the same decision point. A metal retrofit upgrades you to a system that lasts 40–70 years, improves drainage with better slope, and handles Indiana and Illinois weather cycles far better than TPO or EPDM. You’re making a structural upgrade that takes roof replacement off the agenda for the foreseeable future.
No. The existing membrane or built-up roof stays in place. A structural framework is fastened to the existing deck or building frame, and the metal panels are installed on top. This keeps your roof deck protected throughout the entire project and removes the weather exposure risk that a full tear-off creates.
Metal retrofit systems are typically warrantied for 40 years and carry a real-world service life of 40–70 years. TPO and EPDM membranes generally need full replacement every 15–25 years, and built-up roofing systems rarely reach 30 years in Midwest climates. A metal retrofit installed today on a facility in Indiana or Illinois should outlast two or three conventional membrane replacement cycles.
The upfront investment is higher than replacing a membrane system in kind. The comparison shifts when you look at total cost over time: no tear-off and disposal, no budget for another replacement in 20 years, and significantly lower ongoing repair and maintenance costs. For most large commercial and industrial buildings, the cost per year over the roof’s full service life comes out lower than cycling through membrane replacements.
Most low-slope and flat-roofed commercial buildings are good candidates, including warehouses, distribution centers, manufacturing facilities, agricultural buildings, and large retail or institutional structures. The main requirement is that the existing structure can carry the additional load of the retrofit framework and panels. A Sentry Roofing assessment confirms structural suitability and flags any deck sections that need attention before installation begins.
Installation is phased to keep the facility operational throughout the project. Work can be sequenced around your operations schedule, and there’s no extended period of exposed roof deck generating debris or disruption inside the building. Before any panels go on, Sentry Roofing develops a sequencing plan specific to your facility so the project doesn’t interfere with day-to-day operations across Indiana and Illinois job sites.
No Cost, No Obiligation Detailed Inspection & Report
