So this actually stems from the fact my last two pairs of wellington boots have split - as have my husbands, and his were a different brand - my boots were both Joules (~£45 so low-mid range boots) and the second pair were a free replacement.
I tend to use my wellies to walk the dog in the morning, go on beaches, etc, or anywhere my walking boots will get flooded so I can't use them (mid calf water etc).
They seem to get little splits around the front of the boot on the seam / on the side of the front of the foot, or up the back of the leg. I believe it may be due to the material of the boot.
What qualities to look for in a pair of wellington boots?
Edit: They're stored in our hallway, or by the backdoor in the kitchen, both rooms have a radiator in, but the wellies are only near it in the hallway.