Rhode Island Concrete Foundation Codes

Language of the Law

Two of the most important terms used in this context are "minimal quality or performance standards" and "possible deficiency." The state of Rhode Island essentially uses these two components to govern the performance of contractors and their work with concrete foundations. In some cases, the applications of these terms entails specifically outlined standards while, in others, their interpretation remains slightly vague.

Rhode Island supplies different regulations, especially with regard to cracks, depending on the space involved. Rhode Island differentiates its requirements upon distinctions of foundation, basement concrete or garage-slab, though in many ways they may all be considered foundation floors. Each has its own thresholds for cracks that contractors or concrete-layers will beheld accountable for.

Any crack in a concrete foundation that is not considered related to an expansion or control joint is deemed a possible deficiency. While state law acknowledges that cracks undoubtedly appear or are in some cases inevitable, contractors are warned of any cracks exceeding an 1/8th of an inch in width. In basement concrete laying, there cannot be any cracks wider than 1/4 inch or the same in vertical displacement. Any "attached patio" that Rhode Island deems an "integral part of the home" --- this is based on how the patio is structurally supported --- is granted the same measurements. Garages are allowed the same figure in vertical displacement yet 1/2 inch in width for the crack.

If the use of the slab can be determined to be normal, it should not erode to the point where the original aggregate becomes "visible" or displaced. No pits in concrete flooring or foundation work are allowed in any room where there are regularly intended inhabitants. Some exceptions to this rule may be made if there are drainage or other considerations that need be addressed for that space. Rhode Island bans any "unevenness" in the foundation that adds up to more than 1/4 foot or 32 inches. The law can also be read to prohibit a slope that covers more than 1/240 of the designated area. Model dimensions for a 10-foot-wide room are not to exceed 1/2 inch out of level.