Summer Heat and Slab Handling at Install

By the time the second section of granite is set on the cabinets, the epoxy on the first has often started to thicken in the afternoon sun. Installers working in Temecula, CA schedule around that, and the intervals custom countertop installation temecula utah baby watch uses for install timing are shorter than the product sheet says for a hot day.
Why heat changes the glue

Seam epoxy and silicone are chemical products, and warmth speeds the cure. On a Temecula summer afternoon, with the wine country hills baking and a garage sitting far past comfortable, the working time on a seam can fall to a few minutes. A mixed batch that would have given a relaxed twenty minutes in spring may need to be pressed down at once.
Install early in the day

Crews working in Riverside County in July and August load the truck at dawn. The slab sections are cool, the house is cooler, and the epoxy gives time to push a seam tight and scrape the excess. A mid afternoon install on a south facing patio route is harder on the stone, the adhesive and the people carrying it.
Stone and thermal movement
Granite, quartz and quartzite expand a small amount with heat, and a seam set tight on a cold morning may be tighter by evening. Quartz holds heat and can scorch under a dark surface left in direct sun, so pieces waiting on a driveway are covered or kept in shade. A top is never rested on one hot edge of a truck bed.
Carrying a heavy piece
A kitchen top section of stone often weighs more than a refrigerator, and carrying it through a hot house in the afternoon is where mistakes happen. The path from the truck to the kitchen is cleared and the floor is covered. A sink section with an undermount sink cutout is carried on its edge and never held by the cutout, because the narrow stone beside the opening can snap.
Cooling the room and the cure
Leave the air conditioning running during the install, since a cool room gives the silicone and epoxy a predictable cure. A top set in a hot room, then hit with cold air at night, can develop a hairline lift at the joint. Keep the thermostat steady for the first day and keep heavy objects off the seam until the installer says it is set.
Evening air off the Santa Rosa Plateau
Evening wind off the plateau drops the temperature quickly in the valley, so a late install can swing from hot to cool within hours. That swing is one more reason many crews finish setting stone by early afternoon and leave caulking and cleanup for the cooler hours.