Applications include:

  • Fire and demising walls
  • Hi-rise buildings (as infill)
  • Offices and warehouses
  • Homes (external and internal walls)
  • Home additions
  • Sound rooms and studios
The lightweight quality of the block and the discrete nature of the air pockets within are evident by the fact that our Liteblok™ 38 will float on water. Framing, fiberglass insulation, sheathing, vapor barriers and sheet rock can all be eliminated by using Liteblok™ 38 thereby saving time and money. Significant savings in heating and cooling expenses can also be achieved (see Articles in Links & Resources). Liteblok™ 38 exceeds the energy efficiency requirements that many municipalities require. For example, in Austin, Texas, Liteblok™ Grande 38 offers an equivalent R-35 rating (see International Energy Conservation Code or IECC Code and REScheck for equivalent R values for high thermal mass systems for your specific area) as an eight inch thick form with no additional insulation.

All week, the temperature outside was around freezing, inside my Liteblok™ home it stayed between 63°F and 67°F without any heat

The method of determining equivalent R value comes from the IECC. The IECC are our Energy Codes, they are essentially what permit offices within the United States use in determining a structure’s compliance to energy efficiency requirements. The IECC recognizes than high thermal mass systems such as Liteblok™ contribute to energy efficiency not only by virtue of their thermal insulating performance but also by their ability to store energy. The IECC developed equivalency tables to equate the energy performance of high thermal mass systems with wood frame systems, hence the term equivalent R value. Equivalent R value varies by climate as per the IECC and is determined by comparing steady state R values with climate zone maps. The equivalent R value system serves the practical purpose of allowing one to size air conditioning equipment appropriately. Liteblok™ structures are very energy efficient; Liteblok™ reduces heating and cooling loads and the size of A/C systems.


See Understanding Wall Costs for more details

Wood frame and other traditional methods of construction tend to be very labor intensive with labor costs often being many times the cost of the materials themselves. Liteblok™ is designed to simplify and quicken construction. Labor costs to erect a Liteblok™ wall are typically less than 10% of the material cost.

Long lasting, durable and affordable structures can be built with Liteblok™. Its light weight means significantly less cement is consumed and reduced freight loads result in less energy consumption and pollution during transport. It does not rot, is not attacked by vermin, and does not absorb moisture into its core resulting in a lower maintenance requirement. Minimal job site waste is generated during construction. Lightweight cellular concrete absorbs sound (while dense concrete reflects sound) and significantly reduces indoor noise resulting in quieter rooms and little to no sound transmission to adjoining rooms.

While building my Liteblok™ home, when the outside temperature exceeded 100°F, inside was still around 70°F without doors, windows or A/C installed

Liteblok™ 38 is a very healthy and environmentally friendly green building material. No ozone depleting or hazardous chemicals are used during manufacture. Heavy use of pesticide is not required prior to construction. Liteblok™ 38 is a breathable material that removes toxins from the air and naturally maintains a low relative humidity within the home. Mold growth is inhibited by the lack of moisture and organic material (such as wood or paper) combined with the alkaline environment of our cement based system. Because Liteblok™ is a clean breathable material it is ideal for those suffering from asthma, allergies and chemical sensitivities.

To take advantage of the modular design and to avoid cutting the blocks, walls and openings are typically dimensioned in multiples of whole or half blocks.



Owner/ Developer Benefits

  • Liteblok™ homes can cost no more than 2x4 wood frame homes
  • Better performance per unit wall cost than competing systems
  • Great choice for building yourself. Lightweight, interlocking, mortarless design means you don't have to call a contractor, you can do it yourself and save
  • Great for those with chemical sensitivities as Liteblok™ is a breathable material that is not produced with and does not contain any toxins, plastics, flyash, VOCs, or other potentially harmful materials
  • Superior thermal insulation with equivalent R values as high as R-35. Reduces heating and cooling loads and A/C system size
  • Much less sound transmission than wood frame and far better sound absorption than regular concrete. While regular dense concrete reflects sound back into a room, Liteblok™ absorbs the sound in its walls creating quieter rooms
  • Can contribute to a reduction in property insurance premiums of up to 35% (walls, floors and roof being of a non-combustible material)
  • Liteblok™ does not rot or warp and does not absorb moisture into its core resulting in lower annual maintenance costs
  • Termites and other vermin will not attack, burrow, or nest within Liteblok™ cellular concrete
  • Rodents and other vermin cannot enter the wall cavity and attack electrical wiring and plumbing
  • Mold requires warm temperatures, moisture, and organic nutrients such as wood and paper to grown and leave mildew. Liteblok™ is totally inorganic and is mold resistant
  • Liteblok™ is fire resistant and will not burn or produce harmful fumes during a fire. Its fire resistance is superior to CMU walls
  • Resistant to seismic activity and shifting soils. Blocks are interlocking but not physically attached. Unlike traditional concrete wall systems, crack causing stresses in one block are unlikely to propagate through the wall
  • Inexpensive to finish, blocks are smooth and tight fitting requiring only a thin render to finish prior to applying stucco, siding, brick or veneer
  • Unlike regular concrete, Liteblok™ 38 is not prone to sweating of the walls
  • Liteblok™ homes and buildings are comfortable, long lasting and easy to maintain
  • Opportunity for green building tax abatements from municipalities
  • Opportunity for reduced permit processing time and very significant rebates on government fees

Architect/ Engineer Benefits

  • Excellent thermal resistance provides LEED energy efficiency credits
  • Low density gives designers an option for a lightweight, inorganic wall with lower foundation, column, and support requirements
  • LEED credits for being fully recyclable as aggregate at the end of its life
  • Very low embodied energy resulting from reduced cement usage and absence of external heating during manufacture
  • Reduced freight loads and less energy consumption and pollution during transport compared to CMU blocks
  • No hazardous chemicals or VOCs used in manufacture or construction contributing to LEED credits for indoor air quality
  • Sound absorbing walls (as much as eight times more absorbing than CMU) providing LEED credit opportunities for acoustical performance
  • Innovative lightweight, interlocking, mortarless design creates opportunities for Innovation in Design LEED credit opportunities
  • Modular design leads to minimum construction site waste
  • Ductile wall design resists seismic action
  • Flexible system allows engineers to design walls to resist any wind speed requirement in the US
  • Walls are a column and beam structure made from materials that engineers already know
  • Long lasting affordable structures can be built with wall costs competitive with wood frame

Builder/Contractor Benefits

  • Can be built with mostly unskilled workers
  • Speed and ease of construction means fewer workers can build larger wall areas more quickly than competing systems
  • Projects completed faster thanks to precise fit of interlocking dry stacked system
  • Easily accommodates plumbing and electrical wiring, electrical boxes and water taps can be cast in place
  • Self-aligning, requires no bracing or special supports during construction
  • Lightweight forms are safer for workers to handle
  • Since no cutting of blocks is required there is no silicosis risk from working with Liteblok™
  • System is versatile with ledges and double walls possible. Liteblok™ can even be carved and shaped
  • Blocks can be cut with a hand saw and require no special tools, mortars, plasters, or reinforcement. They will not corrode steel
  • Nail gun can be used to install trim, molding and siding


Block Types


Full Block


4.92" (125 mm) deep x 4.92" (125 mm) tall x 9.84" (250 mm) wide with two 1.97" (50 mm) diameter holes. 5 lbs nominal weight

4.92" (125 mm) deep x 9.84" (250 mm) tall x 9.84" (250 mm) wide with two 1.97" (50 mm) diameter holes. 10 lbs nominal weight

4.92" (125 mm) deep x 9.84" (250 mm) tall x 19.68" (500 mm) wide with four 1.97" (50 mm) diameter holes. 20 lbs nominal weight

7.87" (200 mm) deep x 7.87" (200 mm) tall x 15.75" (400 mm) wide with two 3.15" (80 mm) diameter holes. 20 lbs nominal weight


Regular interlocking block
Flat top block for roof lines and windows
Flat bottom block for foundations, windows and doors



Half Block


4.92" (125 mm) deep x 4.92" (125 mm) tall x 4.92" (125 mm) wide with one 1.97" (50 mm) diameter hole. 2.5 lbs nominal weight

4.92" (125 mm) deep x 9.84" (250 mm) tall x 9.84" (250 mm) wide with two 1.97" (50 mm) diameter holes. 10 lbs nominal weight. There are also 1/4 and 3/4 Jumbo block sizes available

7.87" (200 mm) deep x 7.87" (200 mm) tall x 7.87" (200 mm) wide with one 3.15" (80 mm) diameter hole. 10 lbs nominal weight


Regular interlocking block
Flat top block for roof lines and windows
Flat bottom block for foundations, windows and doors

Half blocks are usually selected to fill openings around doors and windows and at ends of walls. Electrical boxes and plumbing fixtures can be cast in place.



Custom Block

Electrical or plumbing fixtures cast in place

Custom sizes, densities, or colors



Bond Beam and Lintel Blocks

A bond beam is a continuous beam, usually constructed of concrete and reinforced horizontally with rebar, on top of supporting walls. The purpose of the bond beam is to tie walls together and distribute weight evenly to the walls below. Our bond beam blocks are interlocking and mortarless and allow for vertical and horizontal steel reinforcement (see photo). The vertical rebar from blocks below (and above) can be tied to the horizontal rebar running through the blocks creating a strong structure with evenly distributed loads.

A lintel is a support beam above windows and doors. Lintel blocks are used in cases where flat bottom Liteblok™ blocks will not suffice. Our lintel blocks are similar in appearance to the bond beam block but have flat bottom surfaces.

Our bond beam and lintel blocks are made of the same material and have the same physical properties as Liteblok™ 69.


4.92" (125 mm) deep x 4.92" (125 mm) tall x 9.84" (250 mm) wide with one 3" diameter horizontal hole and two 1.97" (50 mm) diameter vertical holes. 8 lb nominal weight

7.87" (200 mm) deep x 7.87" (200 mm) tall x 15.75" (400 mm) wide with one 4" diameter horizontal hole and two 3.15" (80 mm) diameter vertical holes. 34 lbs nominal weight


Flat top for bond beams (tops of walls)
Flat bottom for lintels
Regular interlocking top and bottom (for center of tall walls)


Typical Block Properties

 *Full size Standard Liteblok™ **Australia (EBRS-Ryde) 4" panel

A pair of Liteblok™ 38 Standard blocks can be ordered for evaluation and mailed anywhere in the US for a charge of $30 (Order from our Ebay Store).

Additional information about Liteblok™ 38 can be found in our FAQ, News & Information and Blog pages.

Please Contact Us should you need a contractor, engineer, or architect, we would be happy to refer one to you.


Liteblok™ 38 Examples