Flat Roofs, Lanais and Pool Cages

Low-slope roofs manage water differently

A pitched roof uses its slope to move rainwater away quickly. A low-slope roof relies on a combination of slope, drainage, and a continuous waterproof roofing system to move water safely off the structure. Because water drains more slowly, small problems with drainage, seams, flashings, or penetrations can become more important on a low- slope roof. The membrane and the details around it have to work together as a complete system.

Ponding water deserves attention

Water that remains on a roof long after the surrounding areas have dried can indicate a drainage problem. A clogged drain or scupper, debris buildup, a low area in the roof, structural deflection, or insufficient slope can all contribute to standing water. Persistent ponding can place additional stress on the roofing system and may accelerate deterioration of some materials. A small amount of water immediately after a Southwest Florida downpour is not necessarily a roof failure. Water that repeatedly remains in the same area is worth having evaluated.

Pay close attention to edges, transitions, and penetrations

The large open area of a low-slope roof is only part of the system. Some of its most important details are found around the perimeter and anywhere the membrane is interrupted. Roof edges, wall transitions, drains, scuppers, plumbing vents, mechanical penetrations, and flashing details all require careful installation. These are some of the first places we look when investigating a low-slope roof leak.

Lanai and addition tie-ins matter

When a lanai, carport, or addition connects to an existing home, the transition between the two roof or wall systems is critical. Flashing and waterproofing at these connections must direct water away while accommodating the way the different parts of the building come together. When these details are improperly designed, installed, or deteriorated, water can travel behind the roofing or wall system and sometimes appear inside the house some distance from the actual entry point.

A pool cage is not a roof

A screened pool enclosure is designed to provide an outdoor enclosure, not a watertight roofing system. After years of exposure to Florida weather, pay attention to the aluminum framing, anchors, fasteners, connections, and screens. Wind, corrosion, loose connections, and previous repairs can all affect how the enclosure performs. After a major storm, damage may involve the screening, framing, attachments, or a combination of these components, so the entire enclosure should be evaluated rather than focusing on the screen alone.

Coastal conditions are hard on metal components

Southwest Florida's heat, humidity, rain, and coastal environment can be especially demanding on exposed metal components. Fasteners, flashings, drip edge, anchors, and other metal connections should be included when evaluating the condition of a roof or enclosure. Corrosion can weaken components even when the surrounding roofing material still appears serviceable. That is one reason a proper inspection looks beyond the visible roof covering and considers how the entire assembly is attached, flashed, drained, and protected.

If the plan is to enclose the space rather than only re-roof it, what drives the cost of a lanai enclosure explains what moves that number.