Insulatable Cementitious Building Block

Abstract

The insulatable cementitious building block is a concrete block formed with first, second, and third spaced parallel rectangular walls, where the second wall is half the height of and is intermediate to the first and third walls. First and second vertical end cross webs connect the first and second walls from the bottom of the first and second walls to the height of the second wall. First and second spaced intermediate vertical cross webs are in planes between the planes of the end cross webs and connect the second and third walls. These intermediate cross webs are also from the bottom of the second and third wall to the height of the second wall. The first, second, and third walls together with the cross webs form openings that accommodate inserts. Alternatively, the spaces may be filled with liquid expandable foam.

What is claimed is: 
     
         1 . A preformed substantially rectangular building block for constructing walls that may be insulated with the use of either preformed inserts that are placed within the cores of the block during construction, may be filled with liquid expandable foam insulation after construction. 
     
     
         2 . The building block of  claim 1  with larger openings to allow for more insulation. 
     
     
         3 . The building block of  claim 1  that weigh less and make it easier for construction. 
     
     
         4 . The building block of  claim 1  that allows for the acceptance of greater size and amounts of horizontal reinforcement bars (rebar). 
     
     
         5 . The building block of  claim 1  that allows for easier routing of electrical conduit and plumbing pipes without cutting block.