The principles of deep retrofit

At RENOVA we believe that ‘Form Follows Function’! ‘Form Follows Function’ is a simple principle which means that the shape of a building or object should primarily be based upon its intended function or purpose. At RENOVA we believe that the primary function or purpose of a home is to be comfortable. To be comfortable a home should be warm, well-ventilated and free from draughts. Through measures including air-tightness, good insulation and high-performance glazing, we aim to improve your home from the inside out. Through Deep Retrofit by RENOVA, your house can become warm and comfortable both day and night, with minimal heating – and cooler during hot summer weather.

So, for RENOVA a homes ‘form’ is a high quality building fabric and it’s ‘function’ is to be a comfortable place to live in.


There are 8 main elements to a Deep Retrofit:

1.Wall Insulation

wall insulation

Improve wall insulation in a number of ways;

insulated dry-lining internally, blown-in cavity-wall insulation or external insulation with render finish.


2.Roof Insulation

roof insulation

Up to 30% of heat can escape through your roof – so a relatively small investment in roof insulation will yield great returns.

For even greater efficiency your old attic hatch can be replaced with a draught-proof insulated attic door.


3.Floor Insulation

floor insulation

By insulating the ground floor, heat will be retained. Air-tight membranes and tapes will eliminate unwanted draughts.

Underfloor heating will give a feeling of warmth and comfort under foot.


Heating Controls 2.jpg resized

Choose from energy-efficient condensing boilers, heat pumps and renewable energy/biomass appliances.

Energy usage can also be decreased by installing intelligent heating controls and by creating separate heating zones.



With the introduction of low energy LED lights, huge developments have been made in energy-efficient lighting in recent years.

You can  save up to 80% in the cost of lighting your home while also improving lighting quality.



air tightness

When a construction is air tight, warm air is retained and cold air kept out.

 A ‘blower door test’ is carried out to check air-tightness.




A demand-controlled mechanical ventilation system that can automatically sense when it needs to operate is usually the best option to ventilate your home. If budget allows you might upgrade to Mechanical Ventilation with Heat Recovery.


8.Moisture Control

deep retrofit

By installing vapour barriers, your building structure can be protected from penetrating moisture and dampness.

Unchecked moisture penetration can lead to mould growth on your walls and ceilings.


If you want to make the most of your home through Deep Retrofit and receive a reliable, stress-free and quality service, contact RENOVA today for a free, no obligation consultation.


Tel: 01 2021122