Where Gulf Coast moisture shows up inside a Friendswood house, which cleaning habits keep mildew in check, and where a cleaning visit stops and a moisture specialist starts.
In Friendswood, moisture is not a season. It is the background condition of most of the year. Hourly dew point normals near Houston sit around 72 to 73 degrees through June, July and August, and the area collects more than 55 inches of rain a year. That water finds its way into bathrooms, closets, laundry rooms and window frames.
This guide covers what that means for everyday cleaning, which rooms to watch, and the line between surface mildew a cleaner can handle and a moisture problem that needs a specialist.
A dew point is the temperature at which air is saturated. When it sits in the low 70s, as it does around Houston in summer, the air holds so much water that cool surfaces, such as a tile wall after a shower or a window pane facing an air-conditioned room, stay damp for a long time. In January the same normals sit near 44 degrees, which is why winter is the season when things finally dry.
Rain adds to it. Houston Hobby Airport averages 55.62 inches a year, with June the wettest month at 6.09 inches and September and October close behind. The airport also logs about 100 days at 90 degrees or hotter, so air conditioners run for months and every door opening lets warm, wet air into a cool house.
Bathrooms come first, especially in larger homes where a guest or kids' bath may go days between uses and never fully dries. Grout lines, the caulk where a tub meets the wall, and the bottom track of a glass shower door are the usual starting points for mildew.
Laundry rooms are second. Damp towels and a front-load washer door left shut make a warm, wet pocket. Closets on exterior walls come third, where shoes and stored linens can pick up a musty smell. Friendswood's median home dates to 1991, and many houses of that age still have their original bath caulk and window seals, which hold onto moisture more than new ones.
Most mildew control in a humid city is about drying things faster. Run the bathroom fan during and for a while after every shower, squeegee glass doors and tile walls, and leave the shower door or curtain open so air can move. Leave the washer door cracked after each load and move clothes to the dryer quickly.
Keep the house closed up on the most humid days and let the air conditioner do its drying work. Keep furniture a few inches from exterior walls so air reaches the wall surface. A regular cleaning schedule matters too: surface mildew wiped every week or two never gets the chance to stain grout or caulk.
Outdoor mold peaks in the fall. In mid October the Houston Health Department counted 7,744 mold spores per cubic meter of air at its sampling station, which runs around the clock with a spore trap on the laboratory roof. Those spores come indoors on clothes, shoes and pets and settle on damp surfaces.
That is a good time for a One-Time Deep Clean that reaches the vents, ceiling fans, light fixtures and baseboards where spores and dust collect, along with treated shower glass and detailed faucets.
A cleaning visit handles mildew on hard, nonporous surfaces: tile, glass, sealed grout, painted trim and fixtures. It does not handle mold growing inside walls, under flooring, in insulation or in an air conditioning system, and it does not fix the leak or the drainage problem that causes it.
This matters in a city where flat land slows drainage and heavy rains cause most flood damage, according to the City of Friendswood. If a musty smell keeps coming back after cleaning, if stains reappear on drywall or ceilings, or if the home has taken on water, call a qualified moisture inspector rather than scrubbing harder.
For most Friendswood homes, a bi-weekly Recurring House Clean is enough to keep bathroom surfaces from staining through the summer. Large homes with several bathrooms and active families often do better weekly from June through October. The recurring cleaning guide explains the choice, and the seasonal cleaning calendar lists the humid-month tasks.
The questions Friendswood homeowners ask most often about this topic, answered plainly.
TotalCare Cleaning will service Friendswood and surrounding areas with background-checked cleaners and is insured up to $1 million. Re-clean guarantee: if we missed something, tell us by the end of the next day and we come back to fix it. Beyond Clean. TotalCare.
