Nearly Zero-Energy Building   (NZEB)

As of 31 December 2020 all new buildings in the EU will have to consume “Nearly Zero-Energy”.  For public buildings the date is 31st December 2018.

In order to comply with NZEB you must achieve a BER rating of A.  BER A ratings equate to significant savings on your annual heating bill.  We supply the super airtight, thermally superior envelope that forms a critical part in achieving NZEB.  With the FrameSpace Solutions, “Warm Envelope” system, the thickness and type of insulation on the outside depends on the finish you require.

Why wait to save money?  Using CE marked materials and systems, FrameSpace will affordably engineer, manufacture and install you’re Nearly-Zero Energy Building today!


nzeb graph


nzeb graph 2Courtesy of Department Environment Heritage and Local Government


FrameSpace utilise different insulation types as follows:

Non Ventilated Cavities

  • Acrylic Render External Wall Insulation: XPS
  • Brickslip: Mineral Wool
  • Stone slips: XPS

Ventilated cavities:

  • Cut Stone PIR, XPS,
  • Thin Metals such as Copper or Zinc PIR, XPS, PUR
  • Terracotta tiles PIR, XPS, PUR
  • High Pressure Laminates PIR, XPS, PUR
  • Exposed Timber such as Cedar PIR, XPS, PUR


  • Blockwork PIR, XPS, PUR
  • Brickwork PIR,XPS, PUR
  • Stone such as Random Rubble PIR, XPS, PUR


  • Flat: PIR, PUR or EPS
  • Sloping: PIR, PUR or EPS

Between studs

  • Mineral Wool
  • Glass Wool
  • Spray polyurethane foam (SPF)

EPS: Expanded Polystyrene

SPF: Spray Polyurethane Foam

PIR:  Polyunsaturate Insulation Board (foil-faced)

XPS: Rigid Extruded Polystyrene.  

PUR: Rigid Polyurethane Foam

NZEB  Legislative background

Directive 2010/31/EU on the energy performance of buildings (recast) – 19 May 2010

On 19 May 2010, a recast of the Energy Performance of Buildings Directive was adopted by the European Parliament and the Council of the European Union in order to strengthen the energy performance requirements and to clarify and streamline some of the provisions from the 2002 Directive it replaces.

Major points of the Recast Directive include;

  • As of 31 December 2020 new buildings in the EU will have to consume nearly zero-energy.
  • Public authorities that own or occupy a new building should set an example by building, buying or renting such ‘nearly zero-energy building’ as of 31 December 2018.
  • The definition of nearly zero-energy building was agreed as: ¨nearly zero-energy building” means a building that has a very high energy performance. The nearly zero or very low amount of energy required should be covered to a very significant extent by energy from renewable sources, including energy from renewable sources produced on-site or nearby.¨

In Ireland there have been two substantive revisions to Ireland’s Building Regulations (Part L – Conservation of Fuel and Energy) aimed at progressively improving energy efficiency standards towards low to zero carbon buildings.

New regulations, detailed in Technical Guidance Document L – Conservation of Fuel and Energy, came into effect on 1st July 2008 for new dwellings, setting an energy performance target improvement of 40% relative to the previous standards set in 2002.

Subsequent regulations revised this further, to a 60% improvement level with effect from 1st December 2011.

Since July 2008, all new domestic buildings are also required to have the following contribution from renewable energy:

  • 10 kWh/m2 /year contributing to energy use for domestic hot water heating, space heating or cooling, or
  • 4 kWh/m2 /year of electrical energy, or
  • A combination of these which would have the equivalent effect. Since 31st March 2008, when installing a replacement oil or gas boiler, it has been a requirement that the boiler be condensing, where practical (Section L3, Building Regulations Part L amendment – S.I. No. 854 of 200730).