Need help from the turf grass dawgs.

Bought a home about a month ago, new construction. House faces east. Builder sodded the lot with Kentucky 31 fescue. I've been watering frequently, 30 minutes every other day or so. Everything looks good except north side of the house. Not sure if this is a time of year wear fescue starts getting that brownish look or if the water is running off and not soaking in.

Should I be concerned?