This on-site modular underfloor heating service utilizes white PERT heating pipes paired with integrated insulation panels. The panels feature built-in grooves that securely hold the embedded pipes, eliminating the need for steel mesh and enhancing installation efficiency. Pipe layouts are planned according to room dimensions, while the panel’s base layer provides thermal insulation to minimize downward heat loss. The installation process includes floor preparation, insulation panel laying, pipe embedding and securing, circuit connection, and hydrostatic pressure testing. Pipe bends are smooth with no kinks, and blue expansion buffer strips are installed along the walls to absorb deformation from the backfill material. The modular system ensures an organized layout and a shorter installation timeline; backfilling can commence immediately after laying. The system delivers uniform heat radiation and stable, comfortable heating, making it ideal for underfloor heating retrofits in unfinished residential properties.