Rd SAP principles Concepts of Rd SAP

Rd. SAP principles

Concepts of Rd. SAP • Dwelling Types • Building Parts • Dimensions • Age Bands • Habitable Rooms

Dwelling Types Dwelling Type • House • Bungalow • Flat • Maisonette • Park Home Built Form • Detached • Semi-detached • Mid-terrace • Enclosed mid-terrace • Enclosed end-terrace

Building Parts For simplicity of data entry the dwelling is divided into ‘main dwelling’ and ‘extensions’ Extensions may not be extensions in the conventional sense of the word, so we describe them as ‘parts’

Building Parts A building part: • has only one roof type • has only one floor type • was entirely built in one age band

Building Parts

Building Parts 100 mm insulation 50 mm insulation suspended floor Age band A (pre 1900) 2 building parts (main + ext 1)

Building Parts 100 mm insulation suspended floor Age band A (pre 1900) suspended floor Age band C (1930 -1949) 2 building parts (main + ext 1)

Building Parts 100 mm insulation suspended floor Age band A (pre 1900) solid floor Age band A (pre 1900) 2 building parts (main + ext 1)

Building Parts 100 mm insulation suspended floor Age band A (pre 1900) 1 building parts (main only)

Dimensions Once the dwelling is divided into parts, each storey of each part is defined by 4 dimensions each

Dimensions • Internal or external (but not both!) • 4 components: • Area • Storey Height • Exposed Perimeter • Party Wall

Dimensions: ‘Heated envelope’ Porches • Include if heated by fixed heating devices • Exclude if unheated and • external (i. e. protruding from external wall) or thermally separated from dwelling

Dimensions: ‘Heated envelope’ Conservatories • Include unless separated from dwelling by wall with exterior grade doors and windows • Exclude if separated as above

Dimensions: ‘Heated envelope’ Store / utility rooms • Exclude if only accessible from outside of the dwelling • Include if directly accessible from the occupied part of the dwelling

Age Bands Age bands are key to Rd. SAP, as they are the basis of a variety of assumptions about the performance of the dwelling

Age Bands England & Wales Scotland Northern Ireland Park Homes A Pre 1900 before 1900 n/a B 1900 - 1929 C 1930 - 1949 n/a D 1950 - 1966 1950 - 1964 1950 - 1973 n/a E 1967 - 1975 1965 - 1975 F 1976 - 1982 G 1983 - 1990 • Build NOT refurb date 1974 - 1977 n/a 1976 - 1983 (unless uninhabitable 1978 - 1985 Before 1983 1984 - 1990 before 1991 1986 - refurb) 1983 - 1995 H 1991 - 1995 1992 - 1998 1992 - 1999 n/a I 1996 - 2002 1999 - 2002 2000 - 2006 1996 - 2005 J 2003 - 2006 2003 - 2007 K 2007 – 2011 - 2011 • (Slightly different in n/a 2008 - 2011 devolved nations) 2007 – 2013 2006 onwards L 2012 onwards 2014 onwards n/a • Record per part 1900 - 1929 n/a

Age Bands Critical – software makes assumptions about thermal values based on age Seek information from: • Occupier / agent • Documentary evidence • Property style • Building regs-related features

Habitable rooms are another peculiar Rd. SAP concept, and are used to make assumptions about the proportion of the home is that is a ‘living’ area, which informs how it is heated

Habitable rooms Rd. SAP needs a simple count Always included in the count: • Living rooms • Sitting rooms • Dining rooms • Studies • Bedrooms

Habitable rooms Always excluded from the count: • Utility rooms • Bathrooms / WCs • Cloakrooms • Halls / Landings / Stairways • En-suite

Habitable rooms: kitchen Include if there is space for a table and 4 chairs Otherwise exclude

Habitable rooms: divisions • Open plan areas • one room • Rooms divided by a doorway where door temporarily removed - architrave present and hinge holes not filled in • two rooms

Heated habitable rooms Rd. SAP needs a second simple count • A heated habitable room is a habitable room with a fixed heat emitter

Construction and insulation How to enter walls, floors, roofs

Wall construction Construction types: • Cavity • Solid brick • Timber framed • System built • Sandstone • Granite or whinstone • Cob • Park home wall (park home only)

Wall insulation Insulation types: • As built • Unknown • Internal • External • Filled cavity + internal • Filled cavity + external

Wall insulation • Wall and insulation thickness must also be measured • Around window reveals usually best place

Roof construction • Flat • Pitched, access • Pitched, no access to loft • Pitched (thatch) • Other dwelling above • Same dwelling above • Pitched, sloping

Roof insulation Position of insulation: • Rafters • Joists • Unknown • None • Flat roof insulation • Sloping ceiling insulation Insulation thickness also recorded

Floor construction • • Suspended timber Suspended-not timber Solid Separate entries required for main part and any extensions

Floor insulation • Unknown • As-built • Retro-fitted • Insulation thickness if known

Rd. SAP Space Heating How to enter details of the heating and hot water system

• Rd. SAP allows 2 main and 1 secondary heating system to be entered, if required • Main Heating 1 is the one which heats living area

Main Heating Systems Most common are: • Boiler and radiators • Electric storage heaters

Boilers • Typically a central boiler and a circuit of pipe work distributing hot water to a number of radiators • Can be gas, oil , LPG or biomass fuelled • Several types with widely differing efficiencies • ‘Wet’ underfloor heating becoming more common

Room Heaters • Gas fires • Open fires • Closed fires (stoves) • Usually secondary heating systems

Boiler Type • • Regular boiler Combination boiler Condensing regular boiler Condensing combi boiler CPSU Back boiler Range cooker boiler Micro-CHP

Flue Type combinations • Open flue-fan assisted • Balanced flue • Fan assisted room sealed

Central Heating Pump Age • Unknown in most cases • If known it can be entered into Rd. SAP • Post 2012 notably better

Main Heating Controls • • Room thermostats Programmer TRVs Time and temperature zone control • Weather compensator • Boiler energy manager

Types of Secondary Heating – gas fires

Rooms in Roof A special case and needs some description

Types • A conversion of what would normally be a loft space, above the main part of the dwelling, or above any extensions. • A house designed for occupation of the roof space such as a chalet bungalow, usually built with dormer or roof light windows

To be included in the Rd. SAP assessment: • It must be accessed via a fixed staircase • The height of the common wall must be less than 1. 8 m for at least 50% of common wall (excluding gable ends and party walls)

Rd. SAP details In this section we will cover the details of recording the various energy-related property features in Rd. SAP

Terrain Type • Urban • Suburban • Rural Used to determine ventilation

Windows / Glazing Key data items: • Total glazed area • Proportion of multipleglazed area • Multiple-glazing type

Total Glazed Area • Normal or typical • More than typical • Less than typical • Much more than typical • Much less than typical • Sun rooms (next slide)

Extended Glazing and Sunrooms • Rd. SAP definition of a conservatory: a structure with at least 75% its roof and at least 50% of its walls glazed • Sunrooms can be entered in the extended glazing facility

Doors • Total number of external doors includes doors to unheated corridors and any doors within the heat loss perimeter • Double door = 2 doors • Glass patio door = window • Documentary evidence of insulated doors required

Draughtproofing • Proportion of draughtproofed windows and doors is entered as a percentage • Assumptions can be made based on window type if draughtproofing cannot be determined

Open fireplaces • Number of open fireplaces within property recorded • Conventions apply

Low Energy Lighting Need to record: • Total number of fixed light fittings • Total number of fixed low energy lighting fitted outlets Only fixed lighting is assessed LED and CFL are low energy ‘Low energy halogens’ are not

Ventilation Method • Natural ventilation • Mechanical, supply and extract* • Mechanical, extract only* *whole house systems, NOT single room extract fans Presence of air conditioning can also be recorded by ticking a box

Electricity Meters Meter type must be recorded • Single rate meter • Mechanical dual rate meter (often ‘white meter’) • Digital dual rate meter • Other tariffs (18/24 h) • Smart meters not yet