Is it normal to have a horizontal join in shower in different sizes ?.

hi The showers are zone 1 of humidity in the bathrooms. Therefore the background should be fully waterproof, same as the top layer to protect the structure of water damage. If do you think the water(liquid or steam ) will go behind the top surface, then it is a problem. with kind regards Danny nationwide UK construction ltd

Is it Wet Wall as in MDF or plywood with laminate on front and back? These are generally 2.4 MTRS high and come in 1.2, 0.9 & 0.6 MTRS width so unless they've been fitted horizontal you should only have a vertical corner join and caps on the end of the panels if it's within a shower cubicle or possibly a vertical join on a long run if they're not tongue and groove. Even if you have plastic panels these are generally 2.4 -3.0 MTRS long depending on manafacturer and vary in width from 0.25 MTRS - 1.0 MTRS. These can be laid horizontal depending on pattern but should all be the same thickness. Something doesn't sound right there??? Send some pictures to "thecraftycarpenter@googlemail.com"

how high are your ceilings ?,sounds like job not thought out properly , just because they are employed by insurance company does no mean they know what they are doing.