The average water damage restoration job costs $3,800, and that can go up to $16,000 and beyond when you factor in disintegrating drywall and mold.

For example, if the pipework inside the walls or ceiling is damaged, the amount of water coming out may be small enough that the drywall soaks it up and you don't see it actively dripping down.

This is a step-by-step guide on what you should do if your roof starts to leak due to heavy rain in a storm, according to experts at Toolstation.