External Wall Insulation (EWI)
Insulating your solid walls could significantly cut down your heating costs. This is because solid walls let through twice as much heat as cavity walls do. The good news is that they can be insulated from the inside or the outside. Although more expensive than insulating a standard cavity, but the savings on your heating bills will be more.
To insulate a solid wall from the outside you need external wall insulation. Mechanical fixings and adhesive are used to fix the layer of insulation material to the walls, which is then covered with protective layers of render or cladding. The finish can be smooth, textured or painted, tiled, panelled, pebble-dashed (for easy maintenance), or finished with brick slips to provide a real masonry brick finish.
If your home was built before 1920, the external walls are likely to be solid rather than cavity walls. Cavity walls are made up of two layers with a small gap or ‘cavity’ between them.
External Wall Insulation (provided it is done correctly), will give you a new weather proof layer that will protect you from penetrating damp for years to come, and should deal with any existing penetrating damp problems you may have had due to poor wall finish. The insulation will also increase the temperature of the internal surface of the wall, making it less likely that you will get condensation problems on your walls.
The main damp issue to be avoided with external wall insulation is rising damp. If you already have a problem with this, then it will have to be fixed before the insulation is fitted, otherwise you run the risk of trapping the damp inside the wall structure and so making the problem worse.
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