Installing Hot Tub On Roof Deck

Install decking up to from hot tub to leave room for expansion contraction and slight shifting of both the deck and the hot tub.

Installing hot tub on roof deck.

A concrete slab is effective at supporting a hot tub. For spas located on top of a deck stairs are in order. No doubt you ve seen spas that are flush with deck surfaces an elegant look but one that can prove hazardous. But first consider that the floor load of a full hot tub 87 inches square is about 2 1 2 tons.

Most hot tub manufacturers recommend a concrete slab base over other types of bases. Costs of installing a hot tub. Aside from the actual hot tub itself you ll have to consider maintenance installation and how much it will cost to make sure your deck is compatible with the hot tub. When installing the hot tub it may end up being more expensive to have it placed in a difficult location.

A deck may be able to support the hot tub as well. For most a slab four inches thick should suffice unless one decides to get a very large hot tub then something thicker should be poured. Place additional piers or posts including foundations that are at a minimum 1 foot below the frost line at distances of less than 30 inches from the center of one post or pier to the center of the next post or pier below the foot print of the spa or hot tub to be added. This must be installed along with the concrete deck footings of your deck.

Tall decks and hot tubs if the deck level is higher than the top of the hot tub or the deck is built on uneven ground the hot tub is placed on top of the deck. This slab should be at least 4 inches thick and be fully supported from below.