Stained Concrete

Description and Statement of Acceptance

Stained concrete is the result of the application of metallic salts to an existing concrete substrate. Manufacturers of chemical concrete stains suspend the metallic salts in an acid media. The acid acts to lightly etch and soften the surface of the concrete layer so that the metallic salts can penetrate the hardened surface and bond with mineral components of the concrete. The result of this process, when properly performed, is a permanently colored cement layer.

Inherent in the process of staining concrete is a variability or mottling of the color(s). This is anticipated and largely uncontrollable. Variations in or presence of localized mineral components, moisture content, surface laitence, subsurface deposits or accumulations, concrete hardness and density, and surface or sub-surface contamination can affect the final color(s) and degree of variegation.

The degree to which color(s) will vary is often depicted within a sample panel. Preparation, application of stain(s) and applications of sealer(s) all directly impact the resultant appearance. This contractor strongly recommends sampling be performed on the slab which is to be stained. This is generally accomplished by sampling in a room which will be carpeted, tiled or vinyled. If this is not possible, a sample panel can generally be created under future cabinet locations in the kitchen or baths, or under tubs or showers.

Despite the controls, variegation or blotching occasionally occurs which is not represented in sample panels. This also is inherent to the process and is outside the control of this contractor. Causes are usually related to mineral accumulations within the concrete substrate or pollution of the concrete by construction materials or practices. Things that you can do to minimize blotching or spotting are:

	Keep slab clear of nails, staples and other metallic building components.
	Sweep slab daily to prevent accumulation of sawdust, leaves, pollen and soils.
	Do not leave lumber lying on slab, especially composition materials (O.S.B., Ply, etc.).
	Use only oil-less compressors for air tools.
	Prohibit eating on areas of the slab to receive stain (all oils repel the stain).
	Do not allow spitting from smokeless tobacco products on the slab.
	Never use concrete curing materials, coatings or polyethylene sheets over the slab.
	Place temporary, impermeable protection under all activities requiring adhesives or solvents.
	Reduce puddling of water on the slab for extended periods by sweeping.
	Protect stained slab from scuffing, scratching or cutting with a breathable material such as corrugated paper or Tyvecä.

Though not all inclusive, this list can act as a guideline for other trades and their activities while working on the slab. At all times, should a question arise about the staining process, please contact Godwin Architectural. The manner in which concrete is finished as well as the design mix of the concrete will have dramatic effects on the final appearance of the floor. Godwin Architectural Concrete can provide information and answer questions regarding design mix and finishing questions, but it is the General Contractor's responsibility to coordinate all slab placement and finishing issues with the slab contractor.

The General Contractor and Owner or Purchaser attest that they have reviewed the above information and that they accept the conditions as stated. The Contractor will adhere to professional preparation and application techniques, but cannot be held responsible for results which are unanticipated by the Parties to this agreement. The Contractor's statement of warranty is limited to the application of materials and does not extend to any other facet or component of the construction process. The Owner acknowledges and/or the Builder agrees to inform the buyer that this floor must be maintained in order to remain an attractive element of the house. Godwin Architectural will provide maintenance recommendations which are specific to the finishing system chosen by the Owner or Builder for this project. It is the end user's responsibility to follow maintenance recommendations.