TPO Roofing Installation
After the current substrate has been cleaned and ready, the insulation is installed by removing or cleaning the current roof. The facility owner has a variety of insulation choices to consider:
The most common type of roofing insulation, Polyisocyanurate (Polyiso), is more expensive but has a higher R-value score, making it a good investment.
Expanded Polystyrene (EPS) – Because it provides the highest R-value per dollar spent, EPS is used to insulate the entire building, including the roof, walls, and floors. Since EPS is suited for ground contact, it does not gradually absorb water.
Extruded Polystyrene (XPS) is commonly recognized by its green, blue, or pink hue and falls between EPS and Polyiso in terms of price and performance. XPS is semipermeable because its perm value is one.
The TPO covering can mechanically or adhesively attach to the cover board. The roofer returns to use a hot-air gun to weld the joints once the membrane has spread out.