The construction industry accounts for over half of all deposits in UK landfills and 32% of total waste in the EU. To understand prefab sustainability in regards to self build house kits, we should consider that projects incur a large part of this figure before materials even arrive on site.
Alterations, mistakes and over-ordering during the design phase are major sources of waste. Designers often encounter unforeseen circumstances when materials are manufactured and procured, leading to last-minute changes and errors. The two most wasted materials — timber (up to 25% of the total) and plasterboard (up to 36%) — are frequently ruined because of weather and improper storage. Up to 10% of each material is rendered unusable at the building site.
Shoddy workmanship and rushed construction causes structural defects
Prefab sustainability involves early decisions and manufacturing in controlled environments. Since the components of self build house kits are made in-factory, design changes are much less costly, and the factory recycles discarded materials. Weather is not as problematic because buildings are assembled almost immediately after arriving at the site.
One study, which looked at four different projects, found that prefabrication reduces timber waste by 74–87%. A recent Waste & Resources Action Program (WRAP) study put the total possible reduction of waste from prefabrication at 90%.
At the build site, off-cuttings and error rectification cause crews to send significant excess materials to landfills. Shoddy workmanship and rushed construction are the overwhelming causes of structural defects, which not only compromise safety but are major environmental problems since builders have to demolish components and scrap materials.
Material savings, time savings, and energy savings
“Because [systems-built homes] are built in a factory and much of the lumber is pre-cut, there is less scrap and waste; the cut-off pieces are often ground up and recycled; the central location of a factory means no wasted transportation to get workers to an isolated job site, so there are savings in fuel and energy,” said Steven Winter, chairman of the U.S. Green Building Council’s LEED program. “So, in a whole array of material savings, time savings, and energy savings attributes, systems built homes go a long way toward achieving green objectives.”
Victoria State in Australia made a checklist for reducing construction and demolition waste. Its suggestions include:
- Procurement and purchasing policies that support waste avoidance,
- Building for deconstruction,
- Building to standard sizes, and
- Practices & contract specifications that support material salvage & re-use where appropriate.
While there are many more items on the list, prefab sustainability can reduce waste by up to 90% because it checks off the most crucial.
New Build Group – Self Build House Kits Building Contractor
Demand for system built houses is growing exponentially. The factors which explain this trend in the housing sector include the speed of construction and the financial savings generated by the modular system.
The construction of a modular house is at first much faster than that of a conventional house. Delivery times do not exceed two to three months on average, while the building site needed to build a traditional house will last for many months or even several years. The choice of the system built turnkey house is thus perfectly in keeping with the ideas in modern society of saving time and space.
New Build Group “Turnkey Houses” have been developed for builders with high expectations, who are looking for sustainable housing with innovative design features. Whatever house you want to build with our self build house kits, we are listening to your preferences.
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