Table 1. Building fabric characteristics of the base case model.
| Element | Construction detail (external to internal) |
U-value (W/m2K) |
Solar absorptivity | Solar emissivity |
|---|---|---|---|---|
| Main house | ||||
| External walls | 105 mm brick + 50 mm cavity filled with UF foam insulation + 100 mm dense concrete block + 12.5 mm plasterboard | 0.60 | 0.8 | 0.9 |
| Party wall | 12.5 mm plaster + 215 mm brick + 12.5 mm plaster |
1.43 | – | – |
| Internal walls | 12.5 mm plaster + 105 mm brick + 12.5 mm plaster |
1.91 | – | – |
| Ground floor | 125 mm concrete slab + timber battens + 20 mm timber flooring |
1.74 | – | – |
| Internal floor/ceiling (uninsulated) |
20 mm softwood flooring + 150 mm timber joists + 12.5 mm plasterboard | 1.55 | – | – |
| Windows | 6/12/6 double-glazing (argon filled) + PVC frame | 1.57 | – | 0.85 |
| Doors Converted loft |
40 mm plywood | 2.06 | 0.7 | 0.85 |
| Loft roof (insulated) | Concrete tiles + 50 mm ventilated air space + 150 mm PU insulating board between and under rafters + 12.5 mm laminated plasterboard | 0.16 | 0.7 | 0.9 |
| Roof (outside thermal envelope) | Concrete tiles + timber battens + timber rafters | 5.71 | 0.7 | 0.9 |
| Loft walls (insulated) | Timber frame + 150 mm phenolic insulating board + 12.5 mm plasterboard | 0.25 | – | – |
| Internal floor/ceiling (insulated) |
20 mm softwood flooring + 150 mm PU insulation + 12.5 mm plasterboard | 0.16 | – | – |
| Roof windows | 6/12/6 double-glazing (CO2 filled) + PVC frame (0.55g-value) | 1.39 | – | 0.85 |