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Cavity wall insulation is the process of filling insulation into the walls of a structure, often referred to as injection insulation. Dungarvan Insulation contractors offer several types of cavity wall insulation.

Dungarvan Insulation offers consultation, planning and installing so that you get the best possible service from our company. With over 20 years experience and having done thousands of cavity wall insulations; you are in the safe hands of a trusted cavity wall insulation company!



How do I choose the right type of insulation?

  • Be clear about what you’re trying to achieve. For example, the major cause of a hot home could be unshaded windows, so installing shading will be just as important as insulation.
  • Consider where you’re going to insulate — in existing homes, it’s usually the ceiling, but you can insulate under suspended timber floors.
  • Although some experts recommend wall insulation for existing homes, it’s difficult and relatively expensive and usually only occurs during construction or a major renovation. If you’re thinking of building, see energy ratings for regulations governing the energy efficiency of new buildings.
  • Next, decide which insulation products you’re going to use.
  • Carry out a BER to determine what insulation problems you may be having.
  • Ensure water can’t get into the roof you’re insulating, as moisture damages some insulation materials’ performance. If it does get very wet, experts recommend you remove it and have new insulation put in.
  • Check your roof space occasionally for leaks, especially after a storm.
  • Have an electrician check your wiring to make sure it can be safely covered by insulation, or advise how to work around it.
  • Some parts of the building structure (such as ceiling joists or steel frames) may have a lower energy conservation than the material placed between them, so higher levels of insulation need to be added around those areas.

Why Insulate?

Why Insulate?

Insulating your roof or ceiling will help keep your home a pleasant temperature, save you money on energy bills, and pay for itself over time. Several different materials are available — the best one for you depends on your particular circumstances and preferences.

With non-renewable energy resources dwindling, insulation is even more crucial nowadays, and mandatory if you’re building a new home or selling an existing home. You can view information on BER (Building Energy Rating) here.

How Insulation Works?

How insulation works

Heat always travels towards cooler areas. Insulation works by reducing the amount of heat entering from outside your home when it’s hot, and trapping warmth inside when it’s cold outside. The highest percentage of heat transfer occurs via the roof and ceiling, so it’s most important to insulate here. Insulation materials work by affecting some or all of the below three ways of heat transfer.

  • Conduction is the direct transfer of heat through solid materials. A metal poker put into a fire is heated through conduction.
  • Convection involves the transport of heat via the movement of gases or liquids. You’ll feel convection taking place in a two-storey house — the heat rises from the lower floor to the top.
  • Radiation is the transfer of heat across space from a warm body to a cold one — an example is the heat emitted by a bar radiator.

Tips for an energy-efficient home

  • Draughtproof: Make sure doors and windows are properly sealed - you can buy draught excluders or window seals very cheaply.
  • Seal your chimney (with a damper): Avoid installing downlights - besides using a lot of energy, they penetrate the ceiling and insulation, causing heat loss.
  • Shade: Keep your home cool in hot weather by shading the windows that directly receive sun (north, east and west-facing windows). External awnings block more heat than internal blinds (because the heat’s already inside by then). You can also plant deciduous trees near the windows.
  • Ventilate: Ceiling fans for conservatories in summer or for dormer style houses with arm rooms in summer are much cheaper than air conditioning and have less impact environmentally, though they don’t cool the air, only move it about to produce a breeze.
  • BER: Have a BER on your home to ensure you are compliant and to reduce energy costs.
  • Insulate: The most important factor in reducing energy costs is to insulate your home to reduce heat loss and conserve heat within the home.

What is a BER?

  • A BER is an indication of the energy performance of your home.
  • It includes energy use for heating, (space and water), ventilation and lighting.
  • A BER is like an energy label for a household electrical appliance such as a fridge. The label has a scale of A-G. A-rated homes are the most energy efficient and will tend to have the lowest energy bills.
  • From the 1st of January 2009, a BER certificate became compulsory for all homes being sold or offered for rent. If you are buying or renting a house or apartment, you are entitled to a BER so ask the seller, landlord or agent for it.
  • A BER certificate is accompanied by an advisory report which will identify how you might improve the energy performance of your home.
  • A BER is also required, subject to transitional arrangements, where construction of a new home begins on or after 1st January 2007.
  • To book a BER Assessor contact us.

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