We have been really busy and are currently trying to work out what base to put down for a hot tub. Client reckons type 1 compacted in 50mm layers up to 150mm.. He is a rail engineer and thinks that the 4kn load put out by the hot tub will be supported by this sub base easily.
The hot tub manufacturers suggest 150mm sub base with concrete pavers and a 50mm bedding layer. Now I think this is a little overkill.. This is only a guide line. Bearing in mind this is a static load and not dynamic.
any help advice or suggestions?