Our turf rotted so we laid seed which came on lovely then in the winter it all rotted again would it be something in the soil
Probably not in the soil. perhaps you are watering it too much. If you were soaking it every day and never letting it dry out and breathe, it may be that you are drowning the grass.
Give us a call or drop by anytime, we endeavour to answer all enquiries within 24 hours on business days.