I am building decking 310 by 330 to support an inflatable hot tub and a gazebo. the ground slopes away from the house by roughly 10 cm/meter so will need to raise the decking about 30-40 cm at the end furthest from the house.
I have had one builder round to have a look but was also considering doing it myself as I am pretty good at DIY around the house and looking online I had figured that I could do it myself
However the Builder who has been to see about the job insists that, for the amount of weight I will be having with the hot tub I have a brick wall built on 3 of the 4 sides instead of just using posts.
Is he correct, or can I just use properly foundationed posts into the ground (700mm deep is what I have read). If I do just use wodden posts how many shuould a deck of this size and carrying this weight use?