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Overview of Key Changes to TGD L – Dwellings 2019


Technical Guidance Documents are published to accompany each part of the Building Regulations in Ireland indicating how the requirements of that part can be achieved in practice.

Technical Guidance Document L (TGD L) indicates the requirements for Conservation of Fuel and Energy.

A new TGD L is due to be published in 2019. The new document follows a revision of the Energy Performance of Buildings Directive (EPBD). Member States have until March 2020 to translate into national law all the new requirements from the EU energy efficiency legislation affecting buildings.

Draft Transitional Arrangements:

  • NZEB and TGD L 2019 Dwellings to apply to new Dwellings commencing construction from 1st November 2019 subject to transition.
  • Transitional arrangements to allow TGD L 2011 – Dwellings to be used where planning approval or permission has been applied for on or before 31st October 2019 and substantial completion is completed within 1 year i.e. by 31st October 2020.

Overview of key changes to TGD L Dwellings 2019:

  • Introduction of NZEB (Nearly-Zero Energy Building), MPEPC (Maximum Permitted Energy Performance Coefficient)=0.30, MPCPC (Maximum Permitted Carbon Performance Coefficient)=0.35
  • Introduction of Major Renovations to a cost optimal level where technically, economically and functionally feasible
  • Introduction of a Renewable Energy Ratio (RER) of 20% as per ISO EN 52000 (to replace 10kWh/m2 /yr).
  • Reduction of air permeability backstop from 7m3 /hr/m2 to 5m3 /hr/m2
  • Table 1- Reduction of wall and floor backstop U-Value from 0.21W/m2K to 0.18 W/m2K
  • Table 1- Reduction of window backstop U-Value from 1.6 W/m2K to 1.4 W/m2K
  • Inclusion of guidance to avoid overheating in dwellings
  • Par 1.3.2.5 – removal of variation of U-Value with percentage glazing • Introduction of calculation of Ru value for corridors in apartments.

The draft TGD L – Dwellings 2019 can be accessed here.

The current TGD L – Dwellings 2011-2017 can be accessed here.

Minimum BER rating for new houses built in 2019.

Receive an Hour-Long Consultation With an Architect

The RIAI and the Simon Communities of Ireland have again joined forces for the 15th annual fundraising initiative “Simon Open Door”.

We are delighted to announce our participation in this important campaign for the 10th year in a row. Every year we happily dedicate our time and professional expertise to support the Simon Communities of Ireland. All funds raised go directly to the Simon Communities to support their work in tackling homelessness.

The Simon Communities throughout Ireland provide the best possible care, accommodation and support for people experiencing homelessness and those at risk. Together, with people who are homeless, Simon tackles the root causes, promotes innovative responses and urges the government to fulfil their commitments. 

Simon delivers support and service to over 11,000 individuals and families who experience – or are at risk of – homelessness on an annual basis. 



Anyone hoping to build, renovate or extend their home, office or shop in Wexford may be interested in this initiative. Isabel Barros Architects will offer an hour long consultation in return for a donation of €95 to charity. All of the money raised goes towards the work of the Simon Communities of Ireland.

You can sign up for an appointment with Isabel Barros Architects in Wexford on Saturday 11th May, just log in at www.simonopendoor.ie.


Read Testimonials about the Simon Open Door.


Read What Really Happened During Simon Open Door Weekend.


Isabel’s Picks for Spring 2019

FEEL LIKE MAKING A STATEMENT?

Add a pinch of colour

Eden Design,ledline 60, LED LIGHT,INDOOR TILES,WOW Design EU, Arch tiles, CABINET, Quodes, Satellite, Edward Barber & Jay Osgerby, LINOLEUM FLOORING,Forbo Flooring Systems,Marmoleum

1. LED LIGHT

Designer: Eden Design

Name: °ledline 60

Price range: n/a

Material: Aluminium, Powdercoated.

Key features: Continuous lines of light, without limits. Each led module can be cut every 8 cm. Led line can be installed surface mounted, recessed and pendant.

Wattage: 28W/meter.

Available to Ireland from:  Eden Design

2. INDOOR TILES

Manufacturer: WOW Design EU

Name: Arch

Price range: n/a

Material: Ceramic.

Available to Ireland from:  WOW Design

3. CABINET

Manufacturer: Quodes

Designers: Edward Barber & Jay Osgerby

Name: Satellite

Price range: n/a

Material: MDF

Available to Ireland from:  Quodes

4. LINOLEUM FLOORING

Manufacturer: Forbo Flooring Systems

Name: Marmoleum

Price range: n/a

Material: Linoleum.

Key features: CO2 neutral product.

Available in Ireland from: Forbo

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See More Picks

See Full Gallery of Isabel’s Picks



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