Lazarian Polystyrene Insulated Concrete Forms
Lazarian World Homes
Lazarian Insulated Concrete Forms (ICFs) are interlocking blocks produced by Lazarian World Homes from either expanded polystyrene (EPS) or expanded polyurethane (EPU).
Lazarian Insulated Concrete Forms (ICFs) are blocks produced by Lazarian World Homes that are used in houses that are built by Lazarian World Homes. The blocks are formed from either expanded polystyrene (EPS) or expanded polyurethane (EPU).
A machine is used to produce the blocks on site so that only the chemicals and the machine need to be shipped over and the rest of the materials can be obtained locally. ICFs are interlocking and therefore fast to assemble and high insulating making them cost effective and appropriate for extreme temperature conditions.
*Please note that building designs are being included as “products” in the Habitat Sector of the Solutions Library to allow readers to learn from how projects were designed and constructed and how they are serving the occupants, whether effective or ineffective.
Lazarian World Homes has targeted projects on all continents.
Lazarian World Homes outlines that it costs about $269 USD/sq. m. ($25/sq. ft.) or $17,000 USD to build their fully equipped 62 sq. m. (670 sq. ft.), 2 bedroom – 1 bath Lazarian World Home. This cost is based on a home that includes electrical, plumbing, cabinets, appliances and flooring. The price of the 55 gallon drums of isocyanate and polyol from E-Z Flow cost $1,542.80 USD and $1,260.00 USD respectively.
Similar products are available in North America such as the NRG Insulated Block, and internationally such as Reinforced Expanded Polystyrene panels.
Goal 1 and 11: Aims to provide affordable, durable housing.
Small communities looking to build small public infrastructure projects, such as schools and community centers.
Lazarian World Homes brings the machine, chemicals, and molds to the site that are necessary to produce the polyurethane blocks. The cement and gravel for the concrete and the rebar are obtained locally and brought to the site.
Unknown. There are multiple patents registered for Insulated Concrete Forms (ICFs) as they vary significantly in material composition, detailing, and building methods.
Individuals and organizations can reach out to Lazarian World Homes with a project proposal. Lazarian World Homes works as a product manufacturer, installing contractor, and donor/fundraising organization. Their services come together and cannot be obtained separately.
104 projects have been completed and 3 are in progress.
An average of the maximum compressive strength a typical structure could withstand with this building material. Units: σ (N/mm2)
An average of the maximum loads/forces perpendicular to the compressive forces that a typical structure could withstand with this building material. Units: σ (N/mm2)
A seismic design category expresses an area’s likelihood of experiencing damaging effects of an earthquake (A(low), B, C, D0, D1, D2, E(high)). This parameter denotes the highest acceptable SDC for the material.
Climatic zones appropriate for construction based on a material’s availability/feasibility in each climatic zone.
R value associated with material/product
The wall systems of the homes comprise Lazarian expanded polystyrene (EPS) or expanded polyurethane (EPU) foam blocks, concrete and steel rebar.
The assembling of walls requires only four styrofoam pieces, which include the Standard and Lintel Block, a Plug, and the End Cap. The Standard Wall Block and Lintel/Header Block comprise the main pieces. These blocks are 1220mm L x 305mm H x 203mm W (48″L x 12″H x 8″W) and weigh about 1.4 kg (3 lbs). The blocks interlock through a Lego type nature that allows for quick and easy assembly. LWH then uses 3/8 rebar and concrete into holes/studs every 16 inches on-center throughout the wall and the same is done through the lintel block every 1.2 m (4 ft.) from the ground to structurally tie the building vertically and horizontally.
Lazarian World Homes has the building designs available for download.
Lazarian World Homes does not provide ongoing technical support. The user would need to contact a general building contractor.
Since Lazarian World Homes builds homes and does not sell the blocks as a separate product, a user would likely have to obtain additional blocks from elsewhere unless an agreement could be made with Lazarian World Homes to come back to do more work.
Lazarian World Homes projects an economic life of 40-50 years. They also suggest that the blocks can be recycled by grinding up the foam and mixing it into gardens for easier watering, or mixing as an additive into concrete blocks.
Lazarian World Homes claims that their homes are durable, affordable, and eco-friendly (because they are high insulating).
Unknown. No tests are available.
Workers are subject to the general dangers of a construction site that include working from heights and with machinery and sharp tools. EPS and EPU are combustible and therefore many codes require a thermal barrier such as drywall or plaster as a finish on the ICF.
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