We often get asked about bases. After all it is the most important part of the conservatory. Some manufacturers suggest using a product like durabase. These are prefabricated in steel or similar and are supposed to be plonked onto a flat bit of ground upon which your conservatory will sit.
This sounds great until the ground moves over time with the weight of the conservatory on top of it. We have had phone calls asking what can be done about this. In effect - not a lot! Normally there is no alternative other than dismantling the conservatory, building a proper solid base and rebuilding the whole thing.
Although there is more work involved, there is no substitute for building the base correctly. With a dwarf wall the footings need to go down at least 600mm. For a full height conservatory, a well dug out and concreted flat base is essential. If your back yard is lucky enough to have a solid concrete floor that has been down for years with no cracking or movement, this can also be used.
We err on the side of caution as a fully glazed conservatoy is remarkably heavy!