Extruded polystyrene (XPS) insulation boards possess a dense, closed-cell honeycomb structure, extremely low water absorption, and outstanding compressive strength, giving them irreplaceable advantages in integrated projects for floor insulation, underground spaces, and roof waterproofing and insulation. In underfloor heating systems, XPS boards are laid on top of the floor structure, preventing heat conduction downwards and avoiding heat loss to the lower floors, thus improving heating efficiency and reducing energy consumption. The boards have strong compressive strength, capable of withstanding long-term compression from backfill layers and floor loads, and are not easily deformed, ensuring the long-term stable operation of the underfloor heating system.

Besides residential and public building underfloor heating projects, XPS boards are widely used for insulation of underground garages, basement floors, and side walls. Underground environments have high humidity, and many insulation materials experience a significant decrease in insulation performance after prolonged exposure to moisture. The closed-cell structure of XPS boards effectively resists moisture penetration, maintaining a stable thermal conductivity over the long term. Inverted roof insulation systems are a classic application of XPS boards, placing the insulation layer above the waterproofing layer to protect the waterproofing layer from temperature differences and UV damage, extending the lifespan of the roof waterproofing.

During construction, extruded polystyrene (XPS) boards are easy to cut, have uniform dimensions, and few seams, forming a continuous and complete insulation layer and reducing thermal bridging. With the increasing popularity of sponge cities, underground space development, and underfloor heating in residential interiors, XPS boards, which combine pressure resistance, moisture resistance, and long-lasting insulation properties, continue to be the preferred insulation material for flooring and underground projects.