Insulated Metal Panel Roofing in Texas

Each manufacturer publishes the R-value for every panel thickness it makes. Roof panels come in a range of thicknesses, so the choice is a balance between the insulation the building needs, the span between supports and cost.

The energy code sets a minimum roof insulation level for each climate zone, and Texas spans zones 2 to 4, from the Gulf Coast and South Texas to the Panhandle. Depending on the type of roof and the code edition the city has adopted, replacing a roof can require the new roof to meet the current level for its zone, and an insulated panel is one of the more direct ways to meet it on a metal building. Cold stores and other temperature-controlled buildings usually need far more insulation than the code minimum, set by the temperature the building has to hold.

A thicker panel insulates better and spans further between supports, but costs more and is heavier to handle. The thickness is chosen from the insulation the building needs, the purlin spacing and the loads in the manufacturer’s tables.

Outer face colors come from the manufacturer’s paint range. Lighter, reflective colors keep the roof surface cooler under the Texas sun, which reduces heat passing to the inner skin and the space below. Panels are made in long single lengths to cut down end laps, so the longest lengths that can be delivered and lifted onto the roof are worked out early.

An insulated panel roof is heavier and stiffer than a single-skin roof and spans differently, so the existing purlins are checked against the manufacturer’s span and load tables before panels are chosen. Where purlins are too far apart or too weak, extra supports may be added.

The old roof comes off in sections, and each section is closed in with new panels before the next is opened. Panels are made to length, often running eave to ridge in one piece, so delivery, storage and lifting are planned in advance, and each working day ends weather-tight.

Gutters, ridge and eave details, skylights and equipment curbs are all redesigned for the thicker panel. Insulated translucent panels are available for daylighting, and planned rooftop equipment or solar should be known early so supports are built in rather than cut through later.

Insulated panels over an existing roof

Where the old roof can stay in place, insulated panels can be installed over it on new framing fixed through to the original purlins. This avoids opening the building to the weather and keeps operations running below. See metal roof retrofit and overlays for how a roof-over is planned.

Repairing an existing insulated panel roof

Leaks on an IMP roof usually start at side joints, end laps, fasteners, flashings or roof openings. We inspect those details and the neighboring panels to decide whether a local repair is practical. A panel with water in its core or a face that has come away from the foam is normally replaced rather than patched.

A replacement panel has to match the profile, thickness, joint and color of the existing roof. Knowing the original manufacturer and product saves time, and the panel’s markings, drawings or purchase records often show it.

Working above occupied premises

Long panels need room for delivery, lifting and handling. We agree work areas, crane positions and the sequence with your site team, including protection below areas being opened. If a production area or loading route has to close for a time, that is part of the plan before work starts.