When Is the Best Time of Year to Replace Windows

Two walls on the same house look alike from the street, yet the west one can run far hotter than the east one by mid afternoon, and sealant feels that difference. Window replacement in San Bernardino follows the sun, the wind and the lead time on the order, as the notes at replacement windows san bernardino host cell describe. Heat, gusts and rain each change the day in a different way, so the schedule gets built around them.

Hot walls and sealant

Sealant and caulk makers print an application temperature range on the tube, and a surface well above that range can make the bead skin over before it is tooled. The wall surface that faces the afternoon sun gets much hotter than the air beside it. Crews usually work the sunny walls early, while the siding and the frame are still cool to the hand, and move to the shaded sides as the day warms. A dark vinyl window frame sitting in direct sun is checked by touch before any bead goes on.

Santa Ana winds

Strong Santa Ana winds carry dust and debris, and an open window cavity catches it. Grit blown into a fresh bead sticks there and leaves a rough, weak joint. In Redlands, Loma Linda and Muscoy, where dry wind off the foothills is common, the opening is kept closed up until the last moment and wiped clean right before sealant goes in.

Wind is also a handling problem. A large slider sash or a big picture window acts like a sail on a ladder, and insulated glass is heavy and unforgiving if a gust catches it. Work on high or large openings is often paused on gusty days, and smaller double hung units on the ground floor go ahead instead.

Mild seasons

In mild weather an opening can stand open for a short time without much heat or cold entering the house. That gives the crew room to pull the old unit, check the sill, set the new one and square it without rushing. Summer and winter installs are still done every year. They just need tighter sequencing, one opening at a time, so each is closed up again quickly.

Lead time and rain

Most window units are made to order, so the wait for manufacturing is often longer than the installation itself. A casement or a vinyl window with custom sizing, grids or tempered glass may take weeks to arrive, while the install takes a day or two. Weather is picked from the window of days after delivery, not at the time of the order.

Rain on install day mainly matters for full frame jobs, where the rough opening and flashing are exposed. An insert into an existing frame leaves most of that protected, so a light shower matters far less there.

Night movement

Cool nights after hot days make frames and sealant joints move. A composite frame, a vinyl frame and the wall around them each expand and shrink at their own rate. Joints that are flexible and sized correctly take that movement through the year, while a thin, overfilled or rigid joint splits at the edge within a season or two.