Check Part L building compliance

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Ground floor

Provide a name for this element so that it can be identified later
Net area of the ground floor
Total area of the building element across entire dwelling; if the floor is divided among several zones, this is the total area across all zone
Steady-state thermal transmittance of the building element
Areal heat capacity
Effective areal heat capacity or kappa value. This is the total heat capacity of all the construction layers, that is, the sum of the heat capacities of each individual layers.
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Very lightLight board or plastic
Light5-10 cm lightweight brick or concrete
Medium10-20 cm lightweight brick or concrete
Heavy7-12 cm solid brick or heavyweight concrete
Very heavyMore than 12 cm solid brick or heavyweight concrete
Mass distribution class
Distribution of mass in building element
Guidance (opens in another window)
Construction with external thermal insulation (main mass component near inside surface), or equivalent
Construction with internal thermal insulation (main mass component near outside surface), or equivalent
Construction with thermal insulation in between two main mass components, or equivalent
Uninsulated construction (e.g. solid or hollow bricks, heavy or lightweight concrete, or lightweight construction with negligible mass (e.g. steel sandwich panel), or equivalent
Construction with both internal and external insulation (main mass component concentrated near centre of construction), or equivalent
Exposed perimeter of the floor, where heat loss may occur, usually the base of the external walls where they meet the ground floor. Do not include internal wall perimeters.
Linear thermal transmittance of the junction between the floor and the walls
Type of ground floor
This affects what inputs are necessary