How External Wall Insulation and Rendering Can Make Your Home More Energy Efficient

Homeowners often struggle with outer wall insulation walls and high heating bills. Rendering your property is an ideal way to add insulation to your house and make it more energy efficient. It is particularly effective on older homes with solid wall construction as it protects the underlying brickwork from rainwater ingress and penetrating damp.

Generally speaking, EWI comprises an insulation layer and then a protective weatherproof finish (typically render, although cladding systems such as brick slips, cedar or aluminium are also available). The insulation is installed first and then the finish is added over the top, providing protection from wind and rain.

It is important to choose a responsible rendering company, especially with older homes and listed properties, as poorly executed work can lead to moisture penetration and condensation within the walls. This can cause damage to the internal structure of the property and impact respiratory conditions such as asthma. This is due to the fact that permeable EWI allows moisture to pass through the insulated render system to the outside – this is not the case with impermeable insulation where moisture becomes trapped in the property without any other ventilation.

Revolutionize Your Building’s Comfort: Exploring External Insulation Systems

There are various different systems used for fixing the insulation, ranging from adhesive fixed to mechanically fixed. The most popular system is the ‘track and rail system’ where a series of tracks are fixed to the wall with a layer of insulation between each track. A series of corner beads and stop beads are then used to create neat and tight finishes around windows, doors and other obstructions. This also prevents the insulation from touching other materials eg pipes or timber boards.