Water is VERY IMPORTANT!
Here is an example of a homeowner doing everything right! This newly installed sod is still looking terrific after a week of hot weather.
PLEASE make sure you have a sprinkler set up ready to go BEFORE you start! When you are installing your new sod at any time, BUT especially in this heat, water is very important! As you complete one area, start watering immediately (within 15 minutes). This will minimize the stress on the thousands of turf grass plants. Apply at least 2-3 cm or 1 inch of water at least once a day for the first week. During the second week you may be able to apply every other day but if you notice your sod looking dry or curling on the edges more water may be necessary. It just shouldn’t be under water or really mushy for any length of time.