If your home was built before 1920, its external walls are probably solid rather than cavity walls. Without a gap between two layers of brick, also know as a cavity, they will let more heat escape.
Solid walls can be insulated either from the inside or the outside. This will cost more than insulating a standard cavity wall, but your home will feel warmer and could result in year on year savings on your energy bills.
In addition, solid wall insulation can completely transform the look of your property for the better by addressing external upgrades such as rendering or internal upgrades including re-plastering. This could add significant value to the price of your home.
The government-led Energy Company Obligation Scheme (ECO) helps home owners, tenants and landlords reduce their energy bills. Depending on your address, your type of home and income, you and your home may qualify for solid wall insulation funding.