When installing a glued floor system, how is the subflooring attached?

In a glued floor system, the correct method of attaching the subflooring involves using both glue and nails to secure it directly to the joists. This approach provides a strong bond between the subfloor and the joists, ensuring stability and reducing any potential movement or creaking sounds that can occur in a floor. The adhesive layer helps distribute loads evenly, while the nails provide additional mechanical fastening, contributing to the overall durability of the floor system.

The other options do not accurately describe the required method of attachment for subflooring in a glued floor system. Pressure treatment (which refers to wood being treated to resist rot and pests) and termite resistance are important in certain conditions but do not directly pertain to the installation method of subflooring within this system. Doubling the thickness of the subfloor may increase its strength but is not a standard requirement for a glued floor installation. These aspects are important considerations in construction but do not align with the main technique of attaching subflooring when using a glued system.