The question of whether to leave outdoor furniture covers on permanently is common among homeowners. While the instinct is to provide constant protection, the answer isn't a simple yes. Covers do shield from sun, rain, and debris, but they also trap moisture. Most experts advise against leaving covers on *all the time* because furniture needs to breathe.
Permanently covered furniture, especially cushions and fabric, can develop mold, mildew, and musty odors. Moisture from humidity or residual rain gets trapped underneath, creating a damp environment perfect for growth. This can cause more damage than the elements the cover is meant to block.
For optimal care, use breathable, waterproof covers and remove them periodically. Allow furniture and cushions to air dry completely after rain or dew before recovering. During extended dry, sunny periods, it's beneficial to remove the cover for a day to let everything ventilate. The best practice is a balance: use covers for weather protection when needed, but regularly allow for airflow to preserve your furniture's longevity.