In order to know if your property is suitable for cavity wall insulation, the first thing you need to find out is what sort of walls you have.
If you can see the brickwork on the outside of the house, look at the pattern of the bricks.
If your home has cavity walls, the bricks will usually have a consistent pattern with all the bricks laid lengthways.
If your home has solid walls, the bricks usually have an alternating pattern, with some bricks laid across the wall so you can see the smaller ends from the outside.
Some houses have a different type of wall structure altogether. If your house is a steel-frame or timber-framed building or is made from pre-fabricated concrete, then you will need to ask a specialist insulation installer to advise you.