Slab On Grade Floor U Value

F factor ground floor construction.

Slab on grade floor u value. Importance of ground heat transfer for building simulation. A heated slab is a type of construction that has a slab on grade concrete floor with a heating system embedded in or beneath the slab floor. Aedgk12slabandbasement measure not working. Where heated slabs are below grade below grade walls shall comply with the f factor requirements for heated slabs.

Building additions that include a slab on grade construction also are subject to the slab edge requirements listed in the iecc irc. 35 pounds per square foot of floor surface area. Equest under slab insulation assemblies. Slab preprocessors and list object not found.

A reasonable r value for a normal concrete slab can be estimated using an r value the thermal resistance per inch of thickness between 0 1 and 0 2 and multiplying it times the slab thickness. Consult appendix a table a6 3 1 in the 2016 edition for a tabulation of assembly f factors for slab on grade floors based on the arrangement and rated r value of the applied insulation. 1 total r value u value in w m 2 k however if you look at the calculations from my as designed sap 2009 report below the calculated total r value 5 844 m 2 k w and if you take the inverse of that the u value is 1 5 844 0 171 w m 2 k and not the 0 14 shown on the report below. Mass floors shall include floors weighing not less than.

F factor for slabs with both vertical and horizontal insulation. For a 6 inch slab r value would be between 0 6 and 1 2. Insulating over a structural slab jlc balcony and slab edge thermal bridges u value of concrete slab per inch u value of concrete slab per inch exterior edge insulation for existing clarifying slab on grade insulation in. These f factors are acceptable for all slab on grade floors but you need to make sure the insulation is rated and applied accordingly.

Concrete slab r value. Calculating the inverse of that 1 r would give you a u factor in the range of 1 67 to 0 83.