Maxx Minutes Blog

MaxxMinutes - Proper Ventilation Practices for Underlayments

When your project requires a gypsum underlayment, it is important to be mindful of drying conditions. Properdrying practices ensure that your project stays on schedule and that there are no delays installing finished floor coverings.
After the underlayment has been installed it is the responsibility of the general contractor or project superintendent to ensure that proper drying conditions are being met. Discussing these points with your general contractor before the underlayment installation will minimize drying mistakes. We recommend:

  • Ventilate, ventilate, ventilate  – Open windows and allow as much air movement as possible. Leave windows cracked (even during rain) and after work hours. Assign someone to check that windows are left open every day. Often other trades will close windows as they work.
  • Use Heat – Cold floors do not dry quickly. Floors below 50 degrees are going to dry very slowly.
  • Use Mechanical Ventilation – Humid conditions may dictate the need for mechanical ventilation, such as air conditioning or dehumidifiers.
  • Pour Thicker Pours Sooner – Consider pouring thicker installations sooner in the construction process. 2” of underlayment takes longer to dry than 1”.
  • Educate – Explain drying requirements to project managers and floor goods installers. A good underlayment installer will help educate the project manager by communicating drying techniques and with printed ventilation instructions.

Maxxon applicators are invested in the successful outcome of every pour. To help ensure proper ventilation, our applicators include Maxxon’s “Building Conditions Guide” with every bid. This document provides comprehensive details related to adequate drying conditions. For more information on drying conditions and other helpful information, access the “Design and Building Requirements Guide” by clicking on the link to the right.