If you want to give the new SOD a chance, you are going to have to make sure your SOD and soil is not dry to long this week. Depending on the time of year and what climate you are in, you may have to water it A LOT. Living in Toronto, we recommend at least 3 times a day; once in the morning, once in the afternoon and once early evening. If it is hotter or the area has high drainage (like on a hill) you may have to do more.
When watering, you will need to be sure the area is getting completely soaked. Poke a spike or screw driver into the new soil to ensure that you are watering enough. The water needs to reach the soil underneath the sod. If the water is not penetrating down enough, you will start to see large gaps between the rolls of sod; this means your sod is starting to shrink. The first sign of shrinkage is the edges or the rolls will start to turn yellow.
Watering SOD can be a little tricky since it is possible to over water. It is best to give the SOD a good soak rather than a constant light sprinkler shower. This way, you ensure that the water is actually penetrating into the topsoil. As the SOD dries out from the summer heat, the topsoil will maintain its moisture. The SOD’s rooting system will seek out the moisture, germinating deeper into the soil to get the water. If the sod is getting to much water, it will actually prevent the roots from developing into the soil. We call this spoiling as the sod has no drive to create a deep root system since it is getting everything it needs where it is!