Our customers often ask a straightforward question: “How much does this bath weigh, and will my floor support it without any issues?” The answer involves a few considerations.
1. Floor Weight Capacity:
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Concrete floors in newer houses or apartments can handle significantly more weight than older timber floors or timber decks.
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Whether you are planning to install a bath yourself or use a builder, you should confirm your floor’s weight-bearing capacity to ensure a safe installation.
2. Bath Weight and Material:
Baths vary widely in weight, ranging from as light as 40kg to as heavy as 2,000kg. Here’s a breakdown of typical bath materials and their weights for baths measuring 1700 to 1800mm in length:
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Acrylic material: Approximately 40kg
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Copper material: 40 to 50kg
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Stone composite material: 110 to 130kg
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Concrete material: 200 to 400kg
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Natural stone (Riverstone, marble, petrified wood…): 1500+ kg (the heaviest one we have sold so far was 2,500kg)
3. Considering Water Weight:
Remember to account for the weight of water when choosing a bath. Assume the bath will be completely full:
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Each litre of water weighs 1kg.
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As an example, if your bath has a volume of 250L, the water will weigh 250kg once the bath is full.
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People’s body density is roughly 1, so whether you fill your bath with water only or a mix or water / people does not change the total weight.
4. Total Weight Calculation:
Let’s calculate the total weight for each material, assuming a 250L volume:
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Acrylic: ~40kg (bath) + 250kg (water+people) = 290kg
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Copper: 40/50kg (bath) + 250kg (water+people) = 290 to 300kg
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Stone composite: 110/130kg (bath) + 250kg (water+people) = 360 to 380kg
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Concrete: 200/400kg (bath) + 250kg (water+people) = 350 to 550kg
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Natural stone: 1500+kg (bath) + 250kg (water+people) = 1750+ kg
5. Additional Information:
Our spec sheets include bath weights, total volume capacity, and the average water volume needed to fill each of our baths to a comfortable level (10cm below the top edge) with one person.