How the Floor Is Constructed

On all modern caravans the floor is made like a sandwich. The top section is a thin ply wood, the middle section which is around 3-4 cms thick, is made out of a polyfoam material. Then there is a bottom layer of ply.

Why Do I Get Delimitation?

When delamination occurs it is normally in a place in the van which gets used allot such as by the sink or by the door.

The polyfoam section in the middle gets compressed, a void is created which allows the top layer of ply to move when stood on.

Another Reason.

The same symptoms can be caused by a different problem.

The floor is suspended, sometimes a section of the floor can become unglued and can start to move.

Which Problem Do I Have?

A test that can be carried out to determine which problem you have. Someone walks up and down the caravan with a spongy floor, another person looks underneath the van and notes what the floor is doing. If you get a small amount of movement in the floor and it is the sane all the way along it would point to delamination. The void takes up the movement of the ply.

If you notice one section of the floor moving allot more than the others, the sections will become apparent if this is the case,then it would point to the floor becoming loose.

How Is It Fixed?

It is important to diagnose the problem correctly because they are corrected in different ways.

If you have delamination, holes are drilled in a grid formation into the ply and a two part resin is injected into the void.This hardens and stops the top layer of ply moving.

When the whole floor is moving a framework of supporting struts have to be constructed to stop the section moving.