Installation Pictorial for Legalett's Frost Protected Shallow Foundations and Air-Heated Radiant Floors - Work in Progress

The following photographs provide a pictorial description of the installation of a typical Legalett Structural Slab-on-Grade and Foundation Radiant Floor Heating project.

Steps for Installing Legalett Shallow Foundation & Air-Heated Radiant Floor System

​1. Strip topsoil and place 3/4" clear stone.Compact, smooth and level.     2. Locate and place plumbing risers and all other under slab services.      3. Lay out edge elements      4. Install first layer of polystyrene insulation  board.      5. Install second layer of polystyrene insulation board, offsetting the joints      6. Install the bottom layers of wire mesh on chairs as per drawings (perimeter or bearing walls only)      7. Install furnace boxes as per drawings and Product Data Sheets.     8. Cut and install piping      9.Insulate ductwork as per drawings     10. Complete installation of piping    11.Install the top layer of wire mesh, and other rebar as per drawings     12. After inspection by LEGALETT installer, place concrete using vibrator.     13. Steel trowel surface using power trowels.Hand trowel around furnace boxes.     14. Keep top of slab moist for 3 days to minimize shrinkage cracking     15. A Legalett construction heater can be used during and after placing the concrete and needs to be run for 2 weeks before flooring material installation or permanent insert installation.

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