Retrofit for the Future - Warnham Road
Client: Wates Living Space
33 Warnham road is a 1960's semi-detached property which has already undergone 'Decent Homes' improvements.
Works such as window replacement and loft/cavity wall insulation have previously been carried out in a piecemeal fashion and have resulted in condensation and mould growth and the tenant reports less than satisfactory comfort levels with the building facing extremes of temperature in both the winter and the summer months.
The house is built using a panel system infill to exposed aggregate cross walls.
The infill panels have been updated with u-PVC infill panels.
Heating is currently gas fired boiler running a wet system of radiators.
A previous Warm air heating system has been replaced. In the late 1960's Crawley has clustered estates built using the design and formed of semi-detached and 3-4 unit terraces and 3-storey blocks of flats.
The retrofit package will consist of new timber frame infill to the front and rear elevation, vacuum insulated panels with over cladding, top-up loft insulation, replacement triple-glazed windows, insulated entrance door, whole-house heat recovery ventilation and micro CHP replacement boiler, supplemented by roof mounted photo-voltaic cells.
In addition, 100% LED replacement lighting is proposed to minimize electricity consumption, together with A++ rated appliances and advice to the tenants on how to minimize fuel consumption whilst maintaining adequate comfort conditions.
Measure Element Description Thermal Insulation
- Ground Floors
- Existing solid ground floor to be covered with Spacetherm
- C - 18mm chipboard with a Spacetherm blanket backing
- Front Wall
- New timber frame infil and Nanopore Vacuum Insulated
- Panels (VIP's) with rendered Finish
- Flank Wall
- Nanopore Vacuum Insulated Panels (VIP's) with rendered finish
- Pitched Roof
- The existing loft insulation will be topped up with blown Rockprime mineral wool to achieve min. 0.10 W/ mēK
- Windows & Doors
Windows- Remove and replace existing fenestration ( incl. French doors) with triple glazed window units. Part of new Window/ Panel System
- Entrance Door(s)
- Remove and replace existing with insulated door.
- Outline Retrofit Specification - Mechanical and Electrical Systems Ventilation
- Whole-house MVHR Energy Vent Q mechanical ventilation with heat recovery system to be installed
Space heating - primary source
- Micro CHP Baxi Ecogen
- Wet system radiators
- Photovoltaic's Standard Retrofit PV
- Wattbox Intelligent heating controller
- LED 100% replacement LED down lighting throughout.
- Wattbox Data acquisition
- All vents to be blocked
- Seals around all windows
- Review loft/ceiling interface bearing in mind possible downlighter installation
- New eaves tray provision
- Proprietary grommets to all services penetrations
| Energy Performance Calculations | |||
|---|---|---|---|
| Software | Space Heating Requirement(kWh/m2/yr) | Primary Energy Requirement (kWh/m2/yr) | CO2 emissions (kg/m2/yr) |
| PHPP | 37 | 90 | 16 |
| SAP | 56 | 90 | 16 |
| This represents a 87% reduction ofC02 emissions | |||
Retro Fit Project Gallery
