Is it good to build on helical piles and what heating system is best?
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你对电子乐痔疮有什么经验?
Rob DesBaillets
Aug. 26, 2021Last updated: Aug. 27, 2021
They seem to have many ecological strong points - once one has decided not to go the basement route. What in floor heating system - if any - would you recommend. We are looking to build a 24' x 20', two storey cottage in the Bas St- Laurent. thanks,
Rob
Techno piles, helical piles or screw piles can be a good option in some cases, particularly where there are extremely high water tables, or very unsuitable soil conditions. Here is a case study we covered about just such a house –
经济适用房建在螺旋桩上，而不是地下室
There are downsides to building on screw piles though, for one thing you are exposing an entire other surface of your home to the elements instead of having the temperature balancing effects of a basement or a slab on grade. That means either hot or cold air will blow under your home, which can add to your heating and cooling costs, it also makes an attractive shelter for rodents. Then there is resale value, which for homes on piles is much lower.
We here at Ecohome are not big fans of basements, but we alwayschoose a slab on grade instead of a basement when possiblerather than building on helical piles.
It is fairly common to find expansive soils such as leda clay in the Bas Saint Laurent region so I’m wondering if that was what steered you in the direction of building a home on piles. Another option to explore – what we like for ecological reasons among many other reasons –building a raft slab on expansive soils can be much more affordable than soil remediation for thickened edge slabs or basement footings. Do you already have a building lot and know the soil quality?
我们Paalupiste(和Rotopile)通过在螺旋桩中嵌入地热收集器，将螺旋桩作为加热和冷却的来源。它的好处是节省了地热井的钻井成本，在有一层厚粘土的地区，地热井的成本尤其昂贵。当使用堆进行加热/冷却时，长堆实际上可以节省客户的成本，因为它是免费加热和冷却的来源，而不是一个“令人不快的费用”。在北欧，正常的100m2家庭供暖和制冷，只需要总桩米150m即可完成。通常，当只有冷却应用时，或建筑位于比斯堪的纳维亚更温暖的地区时，需要更少的桩米。我们在芬兰有很多成功的参考，最大的参考是在芬兰图尔库有600个停车场，在芬兰波尔沃有4000平方米的青少年足球馆。
https://www.youtube.com/watch?v=oIVRc-WWtCY
Overall the helical piles are hands down a better foundation method for eco-buildings than concrete foundations. Helical piles have about 50% lower carbon footprint than concrete foundations of the same capacity. By using helical piles, you don´t need excavation works, soil removal, frost protection, concrete or a dewatering system. It´s also much faster and cheaper than a "traditional" concrete foundation. Also, the load capacity of the helical piles can be verified more reliable compared to concrete foundations. Because of the lack of excavation works and compact installation equipment the site stays clean and undamaged. The bottom of the building is not touching the ground so it stays ventilated, dry, and mold-free. Helical piles are possible to install in all weather conditions, which is not the case with concrete.
It´s good to do some comparison between foundation methods, and choose the one that sounds the most logical for you.
Brgds,
Tero
Forgot to mention that the helical piles can be recycled, which is one of the most important ecological aspects. The pile can be easily unscrewed and recycled, or even used again.