TPO roofing in Long Beach, CA

TPO stands for thermoplastic polyolefin. It arrives on the roof as wide rolls of reinforced sheet, usually white, and the seams are fused with a hot-air welder rather than glued. Once the seams cool, the laps are as strong as the sheet itself. That welded seam is the main reason TPO has become the default white roof on so many low-slope buildings.

We install TPO on mid-century homes, flat additions, garages, apartment roofs and commercial buildings across Long Beach. Here we cover how the sheet is attached, the thickness choices, the details that make or break a TPO roof, and when we steer an owner toward a different membrane instead.

Mechanically fastened, adhered or ballasted

TPO can be held down three ways. Mechanically fastened systems screw the sheet through plates into the deck along one edge of each roll, and the next roll laps over and is welded to cover the fasteners. Fully adhered systems glue the whole sheet to a cover board, which gives a quieter, smoother roof that resists wind flutter. Ballasted systems, held by stone, are rare on houses here.

On homes and small buildings we usually choose fully adhered TPO over a cover board, because it lies flat, handles foot traffic better and does not drum in Santa Ana wind gusts. On large open commercial decks, mechanical fastening can save cost when the deck holds screws well.

Membrane thickness and what it buys you

TPO is sold in thicknesses measured in mils, commonly 45, 60 and 80. The thickness that matters most is the layer of polymer above the reinforcing scrim, because that is what the sun wears away over the years. A thicker sheet gives more material to lose before the scrim is exposed.

For most Long Beach homes we recommend 60 mil as the balance of cost and life. We suggest 80 mil for roofs with regular foot traffic, rooftop equipment or strong sun exposure with no shade. Material warranties vary by product and manufacturer, and we explain what the specific sheet we order includes.

• 45 mil: lighter and less costly, best on small low-traffic roofs
• 60 mil: our usual choice for homes and garages
• 80 mil: extra wear layer for equipment and service traffic

Weld quality: where TPO roofs succeed or fail

A TPO roof is only as good as its welds. The welder temperature and speed have to match the air temperature, sheet and wind. Too cold and the seam looks closed but peels apart. Too hot and the sheet scorches and weakens. Our roofers run test welds at the start of each day and pull them apart by hand to confirm the setting.

After welding, every seam is probed with a blunt hook tool to find gaps. Corners, pipe boots and curb wraps get pre-formed accessories or careful field-fabricated patches, because those small pieces are where most TPO leaks begin.

When to call about tpo roofing

Why TPO works on so many Long Beach low-slope roofs

Long Beach summers are long, dry and bright. A white TPO surface reflects much of that sun instead of soaking it into the deck, which helps the Cliff May homes of Rancho Estates, the flat-roofed additions in Los Altos and the Plaza, and the top-floor units of apartment buildings downtown. California's Title 24 energy code can require cool-rated roofing on some low-slope re-roofs, so we check what applies to your roof before ordering material.

Near the water in Belmont Shore, Naples and along Ocean Blvd, the marine layer leaves a film of salt and grime on white roofs, so we suggest an occasional rinse to keep it reflective. Edge metal near the coast gets a corrosion-resistant finish. The City of Long Beach requires a building permit for re-roofing, which we pull before work starts.