Every rule your project must meet, found for you.

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

It is the view of the Department that when renovation and/or replacement work to an individual thermal element constitutes a major renovation or the renovation amounts to more than 50% of the surface

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

It is the view of the Department that the requirements of regulation 43A will be met when the person carrying out the work undertakes analysis of and gives consideration to incorporating high-efficien

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Where upgrading to the above standards is not technically or functionally feasible or would not achieve a simple payback of 15 years or less, the element should be upgraded to the best practicable sta

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Where an existing thermal element being part of a building subject to a material change of use or a change of energy status, or an existing element becomes part of the thermal envelope where previousl

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Element(1) U-value (W/m2.K)(2) (a) Threshold (b) Upgraded Cavity wall – cavity insulation(3) 0.70 0.55 Wall – external or internal insulation(4) 0.70 0.30 Pitched roof – insulation at ceiling level 0.

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Simple payback – the number of years it will take to recover the initial investment through energy savings, and is calculated by dividing the marginal additional cost of implementing an energy efficie

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Table B1 gives the circumstances and level of performance that should be reasonable in normal circumstances. However, each scheme needs to be considered individually and some flexibility in the applic

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

When undertaking the renovation of thermal elements, special considerations apply to buildings of historical or architectural value and to buildings of traditional construction that need to "breathe"

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Table B1 Cost effective U-value targets when undertaking renovation works to thermal elements Proposed works | Target U-value W/m2.K | Typical construction | Comments (reasonableness, practicability

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Flat roof constructions Renewal of roof covering – existing insulation, if any, less than 100 mm, mineral fibre (or equivalent resistance) or in poor condition and likely to be significantly disturbe

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Solid wall constructions Renewal of internal finish to external wall or applying a finish for the first time: 0.30 W/m²·K. Dry lining to inner face of wall – insulation between studs fixed to wall to

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Solid wall constructions Renewal of finish or cladding to external wall area or elevation (render or other cladding) or applying a finish or cladding for the first time: 0.30 W/m²·K. External insulat

NI-wide·Technical Booklet F1 Conservation of Fuel and Power in Dwellings

Ground floor constructions Renovation of a solid or suspended floor involving the replacement of screed or a timber floor deck. Solid floor – replace screed with an insulated floor deck to maintain e