If your home was built before the 1920s its external walls are probably solid walls rather than cavity walls.
Insulating solid concrete walls.
And there is no effective way to fill the voids in an existing concrete block wall.
Solid walls have no gap so they can t be filled with cavity wall insulation.
Saint gobain insulation uk manufacture and supply glass mineral wool slabs and slabs along with rigid polyisocyanurate pir boards that can be considered suitable for a wide range of applications across solid masonry walls masonry cavity walls timber framed walls steel framed walls rainscreen cladding walls and prefabricated walls.
Insulation is laid on the concrete and covered with a screed.
The insulation may be rigid board extruded or expanded polystyrene or polyisocyanurate closed cell spray polyurethane foam cellular glass fibrous batt or fibrous blown in insulation note however that fibrous insulation is susceptible to moisture.
When it comes to how to insulate a concrete block house with solid walls applying the insulation material is a bit like waterproofing your home leaving your wall completely dry and resolutely resistant to moisture.
For new construction use rigid boards to insulate slabs and the outside of foundation walls.
Your only option is to cover the inside of the exterior walls with a continuous layer of insulation as though you were insulating a basement wall.
Cavity walls are made of two layers with a small gap or cavity between them.
Basement walls made out of concrete stone concrete bloc and other masonry foundation materials have very minimal insulating properties and cause approximately 20 of heat loss in a home.
Insulating your solid walls could cut your heating costs considerably and make your home more comfortable.
External solid wall insulation.
There will be a damp proof membrane under the insulation and possibly a second membrane on top depending on the type of screed.
That is why insulating your basements walls is necessary especially when you live in areas that have very cold climate.
If the floor must be lifted for another reason or you have a modern concrete floor insulation can be a good idea.
Use a premade kit for this type of project.
Attach the tongue and groove insulation boards to the concrete wall with adhesive.
Interior insulation refers to insulation applied to the interior side of the concrete masonry as shown in figure 1.
Insulating a solid floor.
For a basement remodeling project consider insulating basement walls with foam board.
Solid floors can also be insulated but don t risk damage to original solid floors such as flagstones by lifting them just to lay insulation.
Most modern homes have a solid floor for example.