Insulating your flat roof can reduce your roof’s heat loss by around 90% and save you hundreds of pounds a year on your heating bill.
How it works
Roof insulation works by helping your home to retain heat– reducing the amount of fuel you need to burn for heating and reducing your heating bills in the process.
Flat roofs should ideally be insulated from above using insulation boards. These can be attached either on top on your roof’s waterproof covering or between the timber and the weatherproof layer. It’s ideal to do if you are replacing your roof covering, and is actually a legal requirement in this situation. You can get the insulation installed on the underside of your roof instead, but this may cause condensation issues. Both types of insulation should usually be installed by a contractor.
Cost and Maintenance
A guide to roof insulation types and costs is available here.
Roof insulation can typically save the average home £180 a year on their heating bills.
- Does cavity wall insulation cause damp?
- No, as the cavity insulation is generally water repelling, meaning water cannot cross from the external wall to the internal wall via the insulation - the only way it could cross is if another obstruction is connecting the walls. Before installing the insulation, the empty wall cavities are inspected for obstructions with a special tool called a boroscope. Any obstructions are noted and cleared by the installers before the insulation is injected.
- How do I know if I've got cavity walls or solid walls?
- Most cavity walls are identified by two factors. They are about 10½ to 12 inches (270mm - 300mm) thick overall (You can measure this at a door opening) and all the bricks visible on the outside of the wall are all 9 inches (225mm) long (except at corners and openings) (i.e. are mounted lengthways, with 'headers' or the ends of the brick only visible at corners and openings). Solid walls have repeat patterns of 4 inch (100mm) wide bricks as well as 9 inches (225mm) long bricks over the main area of the wall. The walls are usually a little over 9 inches (225mm) thick, although in larger properties the walls can be 13½ inches (330mm) thick.
- How long does it take professionals to install loft insulation?
- It takes professional installers about 2 hours to install loft insulation in an average sized loft.
- Is it true that everyone in the UK is entitled to subsidised insulation?
- Yes, everyone is entitled to a subsidy and some people can even have free installation. Why? Because the UK Government is obligated to reduce greenhouse gas emissions by international environmental agreements. One of the easiest ways to achieve a large reduction in greenhouse gas emissions is through increased home energy efficiency. The Government has stated that cavity wall insulation and loft insulation are the most effective methods which is why they have legislated for power/energy utilities and power companies to provide subsidies.
- What is loft insulation made of?
- Typically, loft insulation is a mineral wool made out of glass or rock fibers. You can also get natural loft insulation made of sheep's wool, hemp or cellulose which will remove the need for protective equipment,
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