OVERVIEW: The LEGACY BLOCK CICF Building System
Background
The materials for Legacy Block have been in the market for over 45 years and continually enhanced. The material is consider the original Cementitious Insulated Concrete Form (ICF), developed in partnership with BASF in Austria in 1972. Since then over 9 million units have been placed in service. Today, Legacy Block Inc. not only produces under OEM agreements the original Cementitious ICF, but is recognized as the best product in any ICF category with blocks and flat panels installed throughout Europe, Middle East, Far East, North Africa and the Americas, in all types of climates from the Austrian Alps to the Saudi Arabian Desert, to the humid climate of Southeast Asia.
What Is Legacy Block?
LEGACY BLOCK is the ultimate building solution for economical and environmentally-friendly construction. This stay-in-place insulating concrete form system (ICF) is made of a lightweight composite material produced with 85% recycled polystyrene (EPS) and 15% cement by volume. Legacy Cementitious ICF Block is the solution for this century to build environmentally conscious, energy efficient structures that provide a safe and healthy living environment. Legacy Block materials are the original EPS Cementitious ICF.
Legacy Blocks achieve strength from a combination of features specifically designed to maximize both shear and compressive strength.
First, there is the Legacy Block MIXTURE- a lightweight mixture of small EPS beads and concrete combined to form a cementitious EPS concrete, formulated with the right combination of shape, density, and structural material.
Legacy Block and flat panels are not considered a structural building material until wall strength is realized when steel reinforced concrete is added to the blocks. The interior cavities of Legacy Block panels are designed to maximize strength when filled with concrete and steel reinforcement, creating a rigid skeleton of 6” columns inside the panel. The interior channels provide an extremely strong wall using the lowest possible amount of concrete ranging from 0.26 – 0.31 cubic feet per square foot of wall. By using different qualities of concrete and/or various amounts of reinforcement, in horizontal, vertical or even diagonal directions, the load capacity can be adapted to satisfy nearly any building requirement, including multi-story and seismic applications.
The lightweight components that make up the Legacy Block system are used to form exterior and/or interior walls for residential, commercial, multi-family and industrial buildings. Building with Legacy Block is fast, simple, and performed easily even by unskilled laborers and common woodworking tools. Vertical loads of up to 100 tons per lineal m (80 kips/lin.ft.) of wall have been successfully tested without failure. With optimum reinforcement, load-bearing capacity in all directions is increased. Installation is simplified as the Legacy Block system consists of only two components:
Pest Resistant
The mixture of cement and polystyrene in Legacy Block materials creates an undesirable environment for insects. Insects actually hate this stuff. If you were a bug would you chew or lay eggs on concrete when the neighbor’s house was built from wood?
Unlike other ICF systems that use foam panels, Legacy Blocks do not provide a place for termites, carpenter ants and other insects could use to migrate and nest. As lumber decomposes it becomes more susceptible to insects. Legacy Block eliminates this problem. Small rodents that are usually attracted to wall cavities to nest have no place to hide with Legacy Block. Because there are no insects, there’s no reason to use pesticides that leach in to nearby soil.
Legacy Block Is Quiet
Legacy Block cementitious materials provide outstanding acoustical performance. The increased mass and density of Legacy Block provides a very effective sound barrier, keeping outside noise from penetrating exterior walls. Compared to a typical wood frame wall, 75% to 85% less sound passes through a Legacy Block wall.
Scientists describe loud speech on the opposite side of a Legacy Block wall as, “virtually inaudible.” In an independent survey, owners of 74 new CICF homes and 73 new wood frame homes were asked what features they liked. Over 60% of CICF homeowners mentioned the quietness of their homes, versus only 2% of wood frame homeowners.
Interior walls built with Legacy Block reduce the movement of airborne sound from one room to another. Privacy is enhanced. Structures built with Legacy Block have a noticeable “quietness”.
Legacy Block materials provide sound attenuation of up to 53 dB (30 cm; 12 inch wall with covering on both sides), more than sufficient for separation walls between apartments, condominiums, offices and hotels.
Legacy Block is often used to create sound-sensitive rooms such as theater rooms, sound studios or media rooms.
Legacy Block – Safety
An aerial view of New Orleans taken after Hurricane Katrina shows the only home left standing in this area was built with cementitious ICF blocks!
One of the most important features of any building is its ability to protect human life. Legacy Block’s steel reinforced concrete walls provide a safe and secure environment.
Legacy Block steel-reinforced concrete walls are 50% stronger than conventionally poured concrete and up to 700% stronger than wood frame walls. Safety when you need it most.
Safety features include:
- Highly fire resistant – 5 hour rated @2000°F; material will not ignite; produces no toxins
- Flame Spread 0; Smoke Density 5 (450 permissible)
- Effective against Category 5 Hurricane force winds
- Effective barrier from wind-driven debris.
- Earthquake tested up to magnitude level 8 with no structural damage.
- Cleaner indoor air quality
Legacy Block’s superior R- Value and Air Tightness
Greatly reduces heat loss and lowers energy consumption. By increasing thermal performance with Legacy Block, HVAC equipment operates less often, reducing energy costs. Because less moisture filled air penetrates exterior walls, air conditioners don’t work as hard to remove humidity from the air. Legacy Block even reduces heat loss from hot water pipes.
Legacy Block Maintenance
Maintenance – Is reduced in several areas that save time and money for the life of the property. This money saving feature reduces your cost-of-ownership, a good selling feature when resale is being considered. Traditional wood frame or classic construction is prone to ongoing maintenance over the life of the property.
Wood Rot – Eliminating wood frames eliminates wood rot caused by moisture and insects.
Paint – Because Legacy CICF Block is dimensionally stable; in other words it does not expand and contract like wood or classic concrete, paint is then less susceptible to cracking and lasts longer.
Stucco – Most stucco cracks are caused by wood frame or substrate walls that twist and warp. Legacy Block is dimensionally stable and greatly reduces stucco cracks that allow moisture to enter the wall cavity.
HVAC – Because the interior air is better controlled in a Legacy Block built building, the HVAC unit doesn’t work as hard or often. Fewer on-off cycles reduces wear and tear on the HVAC unit and extends its useful service life.
LABOR– Additionally no effective skilled labor is required for the manufacturing and/or erecting of a Legacy Block (CICF) house or structure. This effective transfer of installation technique allows for development within market areas to increase employment.
TOOLS – Legacy Block may be installed with conventional tools normally used in the installation of common building materials.
INSTALLATION Legacy Blocks are very simple to install and do not need special skills. The blocks can be used horizontally or in a combination of horizontal and vertical assembly.
Other Considerations
Reducing the concrete in the wall translates to better insulating properties. Using 2/3 the concrete puts 1/3 more insulation in the wall. When completed, the wall performs even better because its substantial thermal mass dampens temperature swings.
Homeowners like the fact that the dense blocks can hold nails and screws wherever they’re driven. Builders like the fact that they can be cut and shaped with standard carpenter’s tools.
Unlike white foam panel ICFs, Legacy Block can be used below grade as insects are not attracted to our panel. Foam panels provide an ideal place for insects to tunnel and nest and therefore are restricted by code in many parts of the country from being used below grade.
Feature & Benefit Summary
-
Lowest cost-of-ownership
-
Superior thermal performance, Effective R-value R-24 to R-48 depending on panel thickness
-
Energy savings for the life of the property
-
Greatly reduces air leaks
-
Provides more consistent room-to-room temperature
-
Extends HVAC service life
-
Dimensionally stable – reduces maintenance – maintains watertight shell
-
Non-combustible – 5-hour fire rating; much safer than wood frame construction
-
Enhances resale value
-
Up to 700% stronger than wood frame construction
-
Effective against Category 5 Hurricane force winds
-
High sound insulation
-
Impervious to rodents and insects, including termites
-
Does not promote mold growth
-
More consistent room-to-room and floor-to-floor climate control
-
Improved interior air quality; no off gassing
-
Faster build-out; shorter construction cycles
-
Constructed of 85% recycled-content; 100% recyclable
-
BUILD WITH STRENGTH – BUILD FOR LIFE
