Concrete Slab The base of reinforced concrete should be about 4 inches thick and be able to withstand a weight of at least 115 pounds per square foot, especially for larger spas. The concrete should be fully cured prior to placing the tub.Click to see full answer. Keeping this in consideration, how thick should a cement pad be for a hot tub?A solid cement pad should be no less that 4 inches thick. This is something that the average homeowner may not want to tackle. The spa pad should be at least the size of the spa. If you are going to pour cement pad put a slight slope in it so that water won’t pool under the spa.Also Know, do you need a concrete pad for a hot tub? A level concrete pad or a reinforced deck are the most common surfaces hot tubs are installed on. However, depending on the spa model you use, you may not need to pour concrete. Talk to your hot tub dealer about the specific foundation requirements for your spa model. Simply so, can you put a hot tub on a concrete slab? Hot tubs are a popular addition to any home, especially for people who entertain regularly. Most people put hot tubs outside. They weigh around 4,000 lbs. If you choose to place your hot tub on a concrete slab, you”ll have to build something more substantial than a normal 4-inch concrete pad, due to the weight.How thick should a concrete slab be for a pool?To be structurally sound, a concrete pool shell should generally be 6 inches thick. Depending on the engineer and the soil condition, it may be more. (On top of that, the plaster interior finish should be at least ? inch thick.)
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