Get St4rm Tpo Mechanically Fastened Submittal - Johns Manville

Mechanically fastened systems, where the membrane is attached using fasteners and plates or battens in the seams, have historically been popular with when using reinforced EPDM or thermoplastic membranes such as TPO and PVC.

TPO roofing is a single-ply membrane that can be installed over plywood. Although there are different types of roofing materials available, TPO is preferred as it is cost-effective. TPO roofing is also preferred as it is long-lasting and can protect the roof for a few years to come.

Thermoplastic polyolefin (TPO) is known to be very resistant to standing water. It is even used as a pond and pool liner because it is not affected by repeated freeze and thaw cycles.

However, now that the supply of TPO is low, people are scrambling for an alternative solution to solve this issue. The supply chain issues related to the COVID-19 pandemic have caused a TPO shortage.

Underlayment Like the cover board, an underlayment is usually made out of gypsum and acts as an extra layer under the insulation. This can improve the fire rating for buildings that require it, but isn't necessarily essential to the TPO roofing system.

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