STRUCTURE BUILT WITH RASTRA INC CICF MATERIALS
Project Shell: Constructing the shell with an experienced. Rastra Inc team. Ext and Int Walls- an ave of 3 days with double blocks on ave 30 min man hr for 100 sq ft.
STRUCTURE BUILT WITH WHITE BLOCK ICF
Project Shell: White ICF installation requires extra barcing due to its light weight. The light weight without bracing is very prone to blow-outs on ave 4 man hours with bracing for 100 sq. ft.
STRUCTURE BUILT WITH CONCRETE OR WOOD
Project Shell: Constructing the shell with wood or concerete (CMUBlocks) with an experienced contractor – an average of 2 weeks on an average , building with a CMU block takes 11 man hrs for 100 sq ft
Thermal Performance: Using a Rastra Inc Block, the R-value rating is calculated on the whole wall-not just a section of the wall between the studs. There are no gaps that transferrs heat or cold in and out. Greater Thermal Mass overall
Exterior Finish: Rastra Inc is considered semi-finished. Stucco, stone, brick, siding and tile can be applied directly to the exterior without the use of mesh, furring strips, etc.
Interior Finish: Rastra Inc panels can be finished in a variety of ways including plaster, tile or stone are applied directly to the wall with no need for lath, fiber mesh or backer board
Thermal Performance: White ICF R-value rating does not allow for the use of Thermal Mass in the way Rastra blocks do. Stored energy is not used in the normal energy time delay as Rastra advantage of temperature swings
Exterior Finish: Does not accept finishing systems directly as Rastra does. Costing more time and money. Certain finishing systems cannot be applied lowering flexibility of choice
Interior Finish: Does not allow direct application of plaster, tile or stone. Must apply first fiber mesh, lath or backer board. More time and more costs
Thermal Performance: Using normal construction materials, the R value rating is based using the space between the studs. This is actually an incorrect measure due to air transferring in and out of this area. Utility costs will be higher
Exterior Finish: additional steps and materials are required for stucco, stone,brick, siding and tile. These steps also require additional time for installing
Interior Finish: Insulation, lath, fiber mesh or backer-board would be required for finishing interior walls. These steps also require additional time for installing