While structural beams and insulation capture most of the regulatory attention, interior doors and millwork represent a massive cumulative surface area within modern hospitality and residential projects. Traditional solid wood doors often contribute to deforestation, while cheap hollow-core alternatives rely heavily on toxic, VOC-emitting glues that compromise indoor air quality.

In 2026, switching to engineered WPC (Wood Plastic Composite) door systems allows architects to achieve zero-VOC spaces without sacrificing timber aesthetics. By utilizing upcycled wood fibers combined with eco-polymers, these systems lock in carbon for decades, offering a a material option that may support circular-design goals when recycling routes and material documentation are available that aligns perfectly with LEED and Passive House certifications.