2-SubSurfacePrep Concrete.pdf
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- Attached to
- Concrete Pad & Sidewalk Installation
- Solicitation number
- 2026-58
- Issued by
- Union County, Kentucky
About this file
This is a technical specification document from Sof Surfaces providing subsurface preparation guidelines for concrete installation in support of the City of Bowling Green, Kentucky Parks and Recreation Department's concrete pad and sidewalk installation project at Pedigo Park. The document outlines comprehensive requirements for preparing concrete substrates that will support duraSAFE tile installation, including specifications for surface firmness, smoothness, and drainage. Key requirements include achieving a fine to medium broom finish with minimal undulations, maintaining a 1% slope for water runoff while meeting ADA requirements, using height or grade stakes set every 8 feet for consistent screeding, and allowing 7 to 10 days curing time before tile installation begins. The concrete surface must accommodate the 24-inch tile dimensions, and curbs or sidewalks must maintain consistent height and width with no greater than 1/8 inch variance. Posts and equipment should be set to allow tiles to run underneath for improved aesthetics and installation efficiency.
The specification emphasizes that concrete surface requirements regarding loading capacity, regional climate considerations, freezing temperatures, and subsurface conditions should be designed by the project architect or civil engineer. Curb edges adjacent to tiles must be as square as possible with a maximum rounded edge of 0 inches, and drainage must be incorporated to allow water runoff beneath and around tiles. The document requires that the site be clean and free of concrete residue upon the tile installer's arrival, with posts and equipment clean and properly positioned. All drilling or post holes in previously installed concrete must result in a level surface. The document includes a directive to forward these specifications to contractors responsible for equipment installation, asphalt work, and curb or sidewalk installation, with contact information provided for additional questions.
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Text version
4393 Discovery Line, Petrolia, ON N0N 1R0 1-800-263-2363 www.sofsurfaces.com
• The intent of any sub-surface for the tiles is that the surface needs to be firm and smooth.
• Typically sloped 1% to allow for water runoff and still meet ADA requirements.
Sloping usually occurs from the middle of the site towards the outside edge.
• The use of height or grade stakes set every 8 feet to assist with the screeding are helpful in achieving a consistent surface.
• It is critical that the concrete surface is smooth (fine to medium broom finish) with minimal undulations.
• Any imperfections in the sub-surface show through on the tile surface either immediately or over time. For areas or undulations deeper than ¼ inch and larger than an inch it is recommended to use a concrete or cement type patching material.
• The concrete surface specification and drainage requirements will be provided to you by the architect or civil engineer for your project:
– They should have designed the concrete based on loading, area of the country, the sub-surface, freezing temperatures, etc.
– The base pad requires 7 to 10 days curing to allow for moisture to dissipate.
Adhesive does not stick well to moisture.
– The duraSAFE installer should be advised when the concrete pour has been completed and a photo sent showing completion.
• Site should be clean and ready when the tile installer arrives.
• Make sure no concrete residue is left on the equipment posts. Posts to be clean prior to arrival oft he installer and the tile installation.
When using curbs or sidewalks:
• They have to be designed around the thickness of tile and they need to be consistent in height and width with no greater than a 1/8 inch variance in height. We do not trim the pedestals as that affects fall height protection.
• The top of the curb needs to be parallel to the sub-surface for a distance of 12 inches from the curb.
• The curb edge against the tile should have a maximum rounded edge of 0 inch (as square as possible).
• The edge of the concrete curb or sidewalk should be poured at 90 degrees to the surface. The concrete curb should not be wider at the base where it meets the pad.
Drainage on the concrete pad is required:
• The water needs to be able to run away if under the tiles.
• Surface drainage if site is sloped will allow water on top of the tiles to run away.
• If post holes are drilled on previously installed concrete, or holes are left for posts, the concrete needs to be poured so that a level surface is created. SEE attached photo(s) example of what NOT to do.
• Set equipment so the tiles can run under the equipment panels, ramps, etc as it will save considerable time in the tile installation and provides a much nicer finish. This is especially true for rock walls.
• Tiles are installed to a 24 inch dimension so it is important that curbing and edging are installed in measurements no greater than 24 inches.
Please forward this information to those who are installing the equipment, the asphalt and the curbs or sidewalks. If you have any questions please feel free to call our office.
Sub-Surface Preparation – CONCRETE
When planning to install duraSAFE over a concrete surface it is important to keep the following guidelines and requirements in mind for the preparation of the sub-surfacing and curbing.
File details come from the government source that posted it. Updated .