Building Regulations Space Data

This part of the interface deals with building regulations data relating to a specific room of the building.

Building regulations Space Data is accessed by two routes:

1.     for all rooms - via the Apache view menu option ‘Settings/Building Regs Space Data’

2.     for an individual room - via the Building Regs tab on the Space Data dialogue

Building regulations Space Data is not stored in any template and must be entered separately for each room.

Tick this box to include the room in the building regulations analysis. By switching off rooms using this box you can perform separate analyses on different parts of the model.

If an included room is adjacent to an excluded room, or a room in an inactive layer, there is assumed to be no heat loss through the partition.

Using this selector you can specify certain special types of room identified in the Approved Documents, or indicate that a room represents a glazing cavity:

Heated space – includes plant rooms, lift-wells, untreated store rooms, ceiling voids, heated conservatories, etc.

Unheated space with pitched roof and insulation between rafters – treated as part of the roof of the space(s) below, with an Elemental Method U-value limit of 0.2 or 0.18 (Table 1 to J3.2 or Table 1 to J8.3).

Unheated roof space with pitched roof and insulation between joists – treated as part of the roof of space(s) below with an Elemental Method U-value limit of 0.16 (Table 1 to J8.3 or Table 1 to J8.3).

Room-in-the-roof as material alteration – the roof U-value may be up to 0.3 in the Elemental Method, Table 1.

Glazing cavity – windows, rooflights & doors connecting heated rooms with this space will be treated as external. This type is included to cover cases where a glazing cavity is treated for modelling purposes as a separate space.

Other unheated space or space with low level (<= 25W/m2) of heating – not subject to Part L checks (ADL2 paragraph 0.22); treated as part of the fabric for calculation of heat loss from adjacent spaces (ADL2 paragraph 1.8).

Dwelling living area – identifies all or part of the living area of a dwelling for the Part L1 Carbon Index (SAP) Method. For a Carbon Index analysis, at least one room must be designated Dwelling living area.

Unheated, separated dwelling conservatory – identifies an unheated, separated conservatory for Part L1. For definitions of conservatory and separation see ADL1 paragraphs 1.58-1.62 and SAP 2001 section 3.3.3. Glazed partitions between heated rooms and unheated, separated conservatories are treated as external glazing for the purposes of solar gain accounting in the L1 Target U-value Method and the Carbon Index Method. For all L1 methods an unheated dwelling conservatory is treated as part of the fabric for the calculation of heat loss from adjacent spaces (ADL1 paragraph 0.8).

Dwelling conservatory ≤ 30 m² (Scotland) – this room type only applies to the Scottish Building Regulations and should be ignored for the purposes of Part L.  A heated conservatory, whether separated from the dwelling or unseparated, should be assigned the type ‘Heated space’.

This parameter applies only to unheated spaces, including those of type Glazing cavity. It allows for the calculation of the transmission heat loss coefficient through the space from adjacent heated spaces using BS EN ISO 13789:1999^[7].