Overview

A cavity wall consists of two rows of brick or concrete block with a cavity or space between them. Injecting expanded polystyrene bead or wool from the outside is the best method for insulating this type of wall. Cavity wall insulation is an effective an cost efficient way of insulating your home.

Case Study Example

Jim’s 4 bedroom detached house has a footprint of 162m2 (1744ft2) and has an annual heating bill of €2,100. Previously the house had no insulation within the wall cavities, however A-Rated Energy advised on the installation of pumped graphite EPS beads in the cavity walls.

As well as instantly improving the comfort of general living conditions, this simple measure resulted in annual savings of more than €350 in home heating bills. Jim availed of grant aid to the value of €400 from the Home Energy Savings scheme to help him with the cost, which range on average from between €1500 to €1800 in total.

Sizing and Design

The type of wall required for cavity fill is a cavity wall with a cavity or space between two rows of brick or between a concrete block. We recommend that for cavity wall insulation you use an Irish Agrement board certified expanded polystyrene bead or wool. These product have been used for long period of time an are approved by SEI under the Home Energy Saving Scheme. In order to receive maximum results you should fully fill your cavity. A-Rated Energy are registered with the NSAI and are an approved contractor and installer under the Home Energy Saving Scheme. Cavity wall insulation will have a positive effect on the building energy rating of your dwelling.

Cavity Wall Insulation

In order to assess if a cavity needs to be part filled or fully filled a boroscope test will be carried out on the dwelling. This test will be done during the pre installation inspection, and involves using a camera like feature to investigate if there is currently any insulation in the cavity. Cavity walls do not cause dampness. Some believe that filling the cavity will lead to a greater risk of dampness, this is not the case. In-fact insulation repels moisture. An independent study shows that filling a cavity with insulation does not cause damp problems. However it is important that any damp or structural problems are cured before the cavity is filled.

Installation Procedure

A-Rated Energy are an approved Insulation installer under the Home Energy Saving scheme and are registered with the NSAI. The procedure for installing cavity insulation is straight forward. The EPS bead or wool is injected into the gap between the two skins of brickwork, through holes drilled at regular intervals into the mortar joints. The work causes little or no disruption as the insulation is injected into the cavity from the outside, typically taking two or three hours. The holes are then filled with mortar or render to match the original finish. As well as reducing the amount of heat which escapes through the walls, it also reduces draughts and helps create a more even temperature in your home.

Costs and Payments

A-Rated Energy price all work on a per client basis. Pricing terms and conditions vary on the service provided.

After Sales Service

In recognition of the importance of having a first rate back up service, we have invested heavily so that our customers have access to unrivalled levels of back up service. All products offer extensive manufacturer warranties.