You will often hear people say that older properties have better insulation due to the superior quality of building materials used but this isn’t necessarily the case.
Older properties from the 1930s can often have areas that allow noise from next door to penetrate and impact on quality of life. Problem areas can include fireplaces cracks and holes in walls, alcoves and crumbling mortar and plaster. All of these can have a serious impact on soundproofing in the home and often people who live in a property have no idea that any cracks and crumbling mortar is hidden away behind thin plaster board.
If you happen to want to sell a house or let it out to tenants then it is vital to soundproof your home to modern standards. Potential solutions that don’t cost the earth include Spray-applied foams which have unique sealing qualities.
These will reduce airborne sound significantly which makes it ideal for soundproofing interior walls and floors and the area around plumbing stacks to reduce noise from water pipes. If your 1930s property happens to be in London you may also benefit from secondary glazing, which will help reduce external noise.
One piece of Laminated glass 6.4mm thick will stop as much sound as a piece of ordinary glass twice as thick.