What are the Best ICF Blocks for Hot Tubs?

Tubblox Kits

Best ICF Blocks for Hot Tubs? – if you are looking for the answer then read on. Insulated concrete forms (ICF) blocks are a type of construction material that is gaining popularity in the building industry – even more so for building hot tubs.

In this blog and on my YouTube Channel I’ve covered projects that have used them before.

These blocks are made of a combination of concrete and insulation, providing both structural integrity and energy efficiency in a single product. In this blog post, I will explore what the Best ICF Blocks for Hot Tubs are, their construction process, and why they are a great choice for your next hot tub building project.

What are the best ICF Blocks for hot tubs made from?

These blocks are made from expanded polystyrene (EPS) and are used to create the exterior walls of a structure. The blocks are stacked and held in place with steel or plastic ties, and then filled with concrete to create a strong and durable wall.

One of the biggest advantages of using ICF blocks is their insulation value. The EPS material used to make the blocks has a high R-value (this being its insulation properties), which means it is extremely effective at preventing heat transfer. This makes ICF blocks a great choice for energy-efficient construction of DIY Hot Tubs, as they can help keep the warmth in and the cold out.

What is the biggest advantage of using the best ICF blocks for Hot Tubs?

For me, what I think is the biggest advantage is the ease and speed that you can create the walls for your DIY Hot Tub. Think of Lego for adults – these things just slot together. They are lightweight so it also means that one person can easily put them together. Furthermore, if like me you don’t lay blocks very often, then you are probably, like me, very slow at doing it! These ICF Forms just drop in place are much larger than individual blocks so you can create your construction in a fraction of the time.

Another advantage of ICF blocks is their strength and durability. The combination of EPS and concrete creates a wall that is both strong and resistant to damage. This makes them a great choice for hot tubs given they need to hold a large body of water and endure the pressures of regular use.

What are the best ICF Blocks for Hot Tubs – easy, TubBlox

What are TubBlox?

TubBlox, from buildahottub.com are a formwork which is made from expanded polystyrene. TubBlox kits allow the basic hot tub or pool to be constructed from simple blocks, strengthen it with steel reinforcement rebar & then fill them full of concrete. Think of “Lego for adults”!

This method is quick, easy and perfect for the DIYer.

The accessory pieces allow you to create almost any pool or hot tub shape imaginable. The TubBlox Kits have an insulation value which is much greater than traditional construction methods, leading to lower heating costs & savings on energy. In the current climate, it is really important that our DIY Hot Tubs and Pools are fully insulated to keep the running costs down.

What are the advantages of TubBlox Kits?

There are several benefits to using TubBlox Kits construction. One of the main benefits, as previously mentioned is that they provide excellent insulation, which can help reduce heating and cooling costs for the building. This can make them a more cost-effective option in the long run.

TubBlox Kits are also very strong and durable, making them a good choice for building projects that require a strong foundation or structure just like a hot tub.

Another benefit of using TubBlox Kits is that they are easy to work with. They can be cut and shaped to fit a variety of design needs, and the construction process is relatively simple and quick. This can save time and labour costs during the building process.

In addition, TubBlox Kits are environmentally friendly. They are made from recycled materials, and their insulation properties can help reduce energy consumption, lowering a Hot Tub’s carbon footprint.

Overall, the benefits of using TubBlox Kits include energy efficiency, durability, ease of construction, and environmental sustainability.

What are the specifications for TubBlox Kits?

  • Good insulation, allowing you to save energy
  • Quick construction method, reducing labour by 65%
  • Nice, smooth walls
  • No physical straining
  • Ideal for the “do it yourself” market
  • Hardness PS 40
  • 3,33 pieces/m²
  • 0.14 m³ concrete per m² formworks
  • Thermal rating 0,32W/M²/K
  • Dimensions : 1000 mm x 250 mm x 300 mm

Are you Interested in TubBlox Kits?


If you are interested in TubBlox Kits then please do get in touch. I am more than happy to quote your project.

Happy “TubBlox” Hot Tubbin

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