Edmonton, Killucan, Mullingar - Co. Westmeath, Ireland
Office / Fax: 044-9358069 - Mobile: 087-3345505 - Sales: 087-3345500
E-Mail: info@mullingarinsulation.ie

25 Years
Installation Experience
Fully Insured Family Established Business

Nationwide Service

Energy Saving Tips

Fit adjustable vent covers on your vents. These can be closed over on cold nights but will still let in a small amount of fresh air.

By turning down your thermostat by just one degree you can save up to 3% off your annual heating bill.

Trapped air in Radiators can greatly reduce their performance. You should bleed them regularly.
Our staff will be happy to assist you with this on the day of installation.

Pull your curtains at night time as a lot of heat can be lost through your windows & ensure the curtains are not hanging down over your radiators.

Use extractor fans in kitchens & bathrooms only when they are needed. These fans can extract a large amount of the valuable warm air from your home.

Services » 9'' Hollow Block Insulation


Cavity Block Wall Foam Insulation

Fact:  Up to 35% of Heat can be loss through a Poorly Insulated Cavity Block Walls.

poor insulation, heat loss, mullingar insulation

What is a Cavity Block Wall?

cavity block, hollow cavitiesA Cavity Block is a single concrete block with two hollow Cavities. (As per image)

These blocks are built on top of each other in a staggered formation to form a single leaf outer wall.

The cavities in each row of blocks would correspond with the next resulting in the finished wall having repetitive rows of hollow cavities which run from the top to the bottom of the wall. (As per image) 

Why & Where Were Cavity Block/9 inch Hollow block Used?

cavity blocks, wall, buildingThey was used as a quick and cheap way of construction as the Builder would only have to build a single row of blocks as opposed to building two rows if he was building a Cavity Wall.

Cavity Blocks / 9 inch Hollow Blocks were a very common building practice all over the country and they are still being used today in the construction of homes. They are particularly common in large scale housing developments but can be found in once off builds also. Dublin has a vast amount of housing estates where Cavity blocks were used in their construction.

What are the disadvantages of home built with Cavity Blocks?

Homeowners often complain that these homes are very hard to heat and that the rooms become cold soon after the heating is switched off. This is due to the fact that there is a large amount of heat loss through the cavity block wall.  It was not a building regulation to insulate homes built with Cavity Block in the past but all houses built today have to conform to strict building regulations in respect of wall insulation. They must be built to achieve Specific U-Values to ensure adequate thermal insulation.

More modern Cavity Block builds may have insulation fitted internally at time of the construction but its effectiveness depends on the quality of the workmanship.

What can be done to reduce heat loss through Cavity Block Walls?

cavity block insulationThe most practical & cost effective way of reducing heat loss through Cavity Block Walls is to have them injected with Cavity Foam Insulation. The process can usually be completed in one day with the minimum of fuss. It will enhance the thermal performance of your walls which in turn will lead to a warmer home. We have successfully insulated thousands of Cavity Block houses throughout the county over the last 15 Years. All work comes with a Ten Year Guarantee and we promise a professional Service with Competitive Prices.

How does the process Work?

foam, cavity block wall, insulationWe drill into each of the Cavities (as described above) at predetermined levels around your home. We then inject each hole with Cavity Foam. Injection starts at the bottom row of holes and the Foam rises upwards through the Cavities as it is injected until all the Cavities are completely filled. Cavity Foam is a pressurized system that injects Foam similar to shaving Foam into your Wall under 120Lbs of pressure which then solidifies to form a solid mass of insulation. It expands as it is being pumped into the Cavities and can often be seen weeping out through the smallest holes or cracks. 

Will I have a completely Filled Cavity?

No. Cavity Blocks are bridged every 7-9 inches apart so these bridges will always contribute to a certain amount of heat loss through the wall. However we can usually fill about 75-80% of the wall which will greatly increase the thermal characteristics of the wall & reduce cold air circulating around in the Cavities.

How do I know all the Cavities are Filled?

cavity block, hollow cavitiesThe key to this lies in the drill pattern (position where the holes are drilled.) We have many years experience of drilling these walls and we are completely confident that we will fill every Cavity. During injection the Foam will expand with great force so it will flow around any obstructions within the cavities (Protruding mortar etc.)

Will Insulation solve Mildew & Mould growth on my internal Walls?

This is a common problem suffered by homeowners with Cavity Block Walls. It is caused when the hot air inside the house meets the cold external walls. By having the walls injected with Cavity Foam Insulation it can greatly help reduce this mould growth but we cannot guarantee that it will stop it completely.

Advantages of Cavity Foam Insulation

There are many advantages for using Cavity Foam Insulation in your home:

  1. It will not settle or sag within the Cavities.
  2. It will perform for the life of the building.
  3. It will not Rot and is Vermin Resistant.
  4. It will not affect any electrical cables within the Wall.
  5. It is a Fire Retardant.
  6. It can reduce Fungi and mould growth by up to 80%.
  7. It will increase you U- Value and you will have a warmer home.
  8. It is the most Practical and Cost effective way to insulate Cavity Block Walls.
  9. Can be installed with the minimum of fuss usually within one working day.
  10. Increases BER Rating and the value of your home.