Frequently Asked Questions

Below is a list of questions we are frequently asked. Click on each question in order to get the answer. Feel free to contact us with additional questions you may have:

The Worldhaus Construction Methodology uses High Tensile Steel which are prefabricated in to 3 D panels consisting of a super-insulated core of expanded polystyrene sandwiched between two layers of steel welded mesh with truss as a load distribution member to create the structureof a building. A special mix of Mortor / Concrete is then applied using Plastering machine or traditional method depending on the scale of implementation.

EPS is made of styrene. Styrene-based plastics are derived from benzene, originally obtained from trees and used to make tires. Styrene is now synthesized artificially. Its popularity gained momentum in the construction industry due to its key characteristics:

  • Stability – It withstands freeze/thaw cycling without losing structural integrity or other physical properties.

  • Readily available, inexpensive and extremely versatile.

  • Its high strength to weight ratio can’t be beat.

  • Its durability & stability is unmatched.

  • Water resistance.

  • It is chemically inert and does not provide food value for termites, insects, parasites, mold or mildew.

  • Does not contain ozone-depleting chemicals

Steel has come to the forefront as one of the best and most reliable building materials for residential and commercial construction for many reasons:

  • Steel has the highest strength-to-weight ratio of any building material. (When combined with EPS’ equally high strength to weight ratio, a powerful assembly is created, superior in structural capacity, yet light, safe and easy to work with.
  • 100% recyclable

  • 85 % industry recycling rate

  • Non-combustible, does not burn, nor contribute fuel to spread of fire.

  • Inorganic — It will not rot, warp, split or crack.

  • More dimensionally stable than wood – does not expand or contract with moisture content.

  • Consistent quality – Steel framing components are produced in strict accordance with National standards. There are no regional variations.

Mold, termites and other insects need three elements to thrive: air, a food source and moisture. EPS provides no food value and remains dry. This is particularly significant in warm, damp regions, where insulation materials that absorb and wick moisture through their open cell structure, provide a perfect medium for mold and insect proliferation.

Yes. Extensive testing has been performed by certified independent laboratories. The panels have been tested for axial loading, transverse loads, racking shear and fire.

The following evaluation reports have been issued:

Specialized Testing: Axial Load Test
Specialized Testing: Racking Shear Test
Specialized Testing: Transverse Load Test
Specialized Testing: Load test on House as a Unit
Specialized Testing: Nailing Strength
Specialized Testing: Fire Test

Basic engineering is incorporated into panel design. However, special design circumstances may require additional engineering. This can be handled by the owner’s project engineer or for an additional fee, one can be provided by Worldhaus.

Pre-molded open electrical chase ways are incorporated into the EPS core of the panel during fabrication, according to MEPF design plans. (More time and labor savings!). Electricians and plumbers familiar with commercial steel stud construction adjust quickly and easily to working with Worldhaus Rapid Panels because it simplifies their work. Additional chases for wiring and plumbing are easily formed in the field, using a hot knife – much like a hot knife cutting through butter.

Using readily available tools, modifications are easily made. An assembly manual is provided with full instructions for field adjustments. Also, phone or e-mail technical assistance is readily available.

6 to 8 weeks after the order has been placed. For effective use of time, site preparation and foundation work can be completed by the builder whilst waiting for panel delivery.

No! In fact, standard finishes typically require less effort to apply due to the dimensionally stable, straighter, smoother wall surfaces that Worldhaus Rapid Panels provide, compared to traditional.

Since each project would require specific size of panel for optimal use of resources hence desired size and types of panels have to be manufactured, our standard policy is to provide estimates from dimensioned architectural drawings that must include a floor plan, elevations and roof plan, with rough opening sizes for doors and windows. For better comfort we are also training local Architects and Structural Engineers so that they can easily estimate the required quantity.

Yes. A representative of Worldhaus Rapid Panels is available to provide you and/or your Contractor with technical assistance as needed. A detailed set of shop drawings, indicating the numerical sequence of panels and an assembly manual are provided for ease of assembly. Typically, workers pick up the sequence of installation pretty easily. If needed, additional support personnel can be assigned as per requirement on nominal charges basis.

Absorption of moisture by insulation materials is partly responsible for some of the variations between published R-values and actual R-values. While fiberglass insulation may have a better initial R-value when tested in the Lab, actual results change quickly in field studies, indicated with thermographic photography. As stated by Oak Ridge National Lab – Dep’t of Energy, “Of all the materials used for insulation, closed cell Expanded Polystyrene (EPS) is one of the most resistant to the adverse effects of moisture. Unlike other insulation materials, which are easily penetrated by moisture under critical vapor flow conditions, the thermal performance of EPS is only marginally affected by condensation. Even if condensation develops through improper use, EPS will retain its dimensional stability and superior insulation values for the life of the structure”. Furthermore, the elimination of water vapor diffusion into walls and roofs reduces the potential for mold growth.

A fire retardant material slows burning across the surface of a combustible substrate.A fire resistive material delays heat penetration through a substrate.

Wall construction is classified as 4-hour, 3-hour, 2-hour, 1-hour or ‘non-rated’ construction, through standardized testing. An assembly is exposed to heat and flame on one side and tests for heat transmission, burn-through, structural integrity and ability to withstand a hose stream from a fire hose are determined. Hourly Ratings are assigned only to “complete assemblies” of structural materials for buildings, (wall, floor, door, ceiling, roof, etc.) and generally require use of a noncombustible membrane, such as gypsum or masonry, etc. Hourly ratings are NOT assigned to any one single component of a complete assembly such as a paint coating, wall covering or other single building material. There is no such thing as a paint coating, additive or treatment that can be applied to any wall or ceiling configuration, which will give a 1, 2 or 3 hour rating.

Yes. In addition to being systems tested for surface burning characteristics, smoke development, room fire tests and hourly fire test ratings, Worldhaus Rapid Panels have been tested as a wall system with 25mm plaster with gypsum putty along with primer and 2 coats of paint on the wall and slab with thermal barrier for 2-hour fire rating. Higher Fire rating hours can be archived if we increase the plastering thickness to 30mm or 40mm accordingly. A Fire repellent paint would additionally add more time to the same structure.

All projects, regardless of construction methods, must be engineered to meet local seismic codes. However, because of the relative lightweight-to-strength ratio of Worldhaus Rapid Panels, their dynamic and reactive forces are minimized. According to the National Information Service for Earthquake Engineering at UC Berkeley, “The smaller the reactive masses, the smaller the earthquake forces will be. In seismic resistant construction, “The use of unnecessary masses should be avoided. Any mass used in the building should have a seismic-resistant function. Structural steel, while equally stiff per unit weight as any other traditional constructional material, provides significantly better resilience, ductility and toughness per unit weight than concrete and masonry materials in resisting earthquake forces”.

Initial costs are very comparable, considering that a one-step installation replaces four separate operations of conventional construction: structural capacity, insulation, sheathing, vapor and air barrier assembly. But more importantly, is the Life Cycle Energy savings as a result of a higher quality, longer lasting, resistant thermal envelope.

The R-Value ratings will vary with differences in:

  • thicknesses and density of the EPS core

  • thickness of the plaster / mortar applied to the interior and exterior

The following figures are approximate indicators of the expected minimum of R-Value ratings:

  • 50mm EPS Core R-Value 1.2 m2C/W

  • 80mm EPS Core R-Value 1.8 m2C/W

  • 100mm EPS Core R-Value 2.2 m2C/W