the drying out certificate says that the house is dry enough to do the other repairs, such as redecorating and laying new carpets.
Read you insurance policy. Twice.
Make sure your insurers are involved and understand that you may need replastered walls and ceilings, new floor coverings, replacement possessions. If the kitchen cabinets got wet, they will be ruined because they are made of chipboard or MDF which swells and falls apart when damp.
Kitchen appliances may have been damaged.
Sockets and swiitches may need to be replaced.
The carpets or other coverings ought to be taken up so the floor can dry. If it is a chipboard floor it will need to be taken up and replaced. The insurers will have a carpet assessor who will look at your carpets and note their quality. If necessary he can look at an off-cut (e.g. if you have nowhere to store wet, rotting carpet). The insurers will try to give you a voucher for Carpetright because they get commission. See if you can get better elsewhere for the money. You might like to add a bit on to get better. You are entitled to new underlay, edge grip and fitting, of course.
Keep records of your electricity meter readings. The insurers will pay for rhe electricity used by the dehumidifiers (about 30p per hour each if they are biggish ones). The dehumidifiers must be used in rooms with the doors and windows shut, otherwise they will try to dehumidify the world. Until they arrive, open windows and doors to let the water vapour out. Ventilation dries a house, heat doesn't.
Take plenty of photos so you remember what had to be done.
make notes of all the damage to include in your claim.