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What are the spots?carbon dioxide emissionsfuel costs They show the relative Cost Savings and Reduced CO2 emissions.

Money
Saving
Tips
 Energy 
Savings 
Each Year
 Money
Savings
Each Year
 CO2
Savings
Each Year
 Comments
dishwasher energy saving tips Dishwashers
Read More
30kWh -
90kWh
£4.62 -
£13.86

circle
11.01kg -
33.03kg
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Run the machine full and less often

boil less water in kettle energy saving tips Boiling Water
Read More
82kWh -
164kWh
£12.628 -
£25.256

circle
30.09kg -
60.19kg
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Boil only what you need. Savings depend on how much tea you drink!

fridge freezer energy saving tips Fridge Freezers
Read More
50kWh -
400kWh
£7.7 -
£61.6

circle
18.35kg -
146.8kg
circle

Fridge maintenance. Savings depend on size, age and rating

dmoney saving tips tumble drying Tumble Dryers
Read More
90kWh -
350kWh
£13.86 -
£53.9

circle
33.03kg -
128.45kg
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Operate Less often, clean filters, part dry clothes?

differnce in cost of shallow or deep bath Baths
Read More
700kWh -
1400kWh
£30.1 -
£215.6

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147kg -
513.8kg
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Have shallower baths and consider how you heat water

change energy supplier to save money Change Supplier
Read More
0kWh -
0kWh
£0 -
£500

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0 -
0
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save money and have a beerSwitch! This is the single simplest way of saving money. This is equivalent to 100 pints of beer!

shower or power shower which is cheaper Shower of Power Shower
Read More
120kWh -
1100kWh
£18.48 -
£242

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25.2kg -
403.7kg
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Aviod immersion heated power showers

save money and energy with good loft insulation Install Loft Insulation
Read More
3000kWh -
3750kWh
£129 -
£161.25

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630kg -
787.5kg
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Modern loft insulation in a 3 bed semi - these numbers are for Gas, savings are greater for other fuels

save money and energy with good loft insulation Improve Loft Insulation
Read More
1000kWh -
1500kWh
£43 -
£64.5

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210kg -
315kg
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Modern loft insulation in a 3 bed semi - these numbers are for Gas, savings are greater for other fuels

This table is under construction there are more tips here.

Measures to reduce fuel bills: ROI* is the time it takes in years to return the investment in fuel savings for an average gas heated 3 bed semi-detached house.
Measure ROI*
hot water tank insulation save energy save money Lagging 1 Year
loft insulation energy saving Loft Insulation 2 Years
cavity wall insulation energy saving Cavity Wall Insulation 2.3 Years
underfloor insulation energy saving Underfloor Insulation 4.4 Years
solid wall insulation energy saving Solid Wall Insulation 15.8 Years
double glazing energy saving Double Glazing 58.1 Years
Renewable Energy Measures ROI** is the time it takes in years to return the investment in energy. The table assumes no government incentive schemes are used (FIT or RHI).
Measure ROI**
solar hot water energy saving costs Solar Hot Water 11 to 62 Years
ground source heat pump investment costs Heat Pumps 4 to 81 Years
domestic wind power costs Wind Power 16 to 32 Years
solar PV costs and investment Solar Photovoltaics 13 ± 3 Years

Loft Insulation

Last Updated on Monday, 06 March 2017 14:28


loft insulation good investment save money
 Cost:  Low
 ROI:  2 Years
 Skill:  DIY-Skilled
 Energy Saving:  High
 CO2 Saving:  High
 How much this measure costs to install: Low : Medium : High
 ROI is the time it takes to return the investment in fuel savings for an average gas heated 3 bed semi-detached house and assumes no government incentive schemes are used: Years
 How easy this is to do: DIY-Easy : DIY-Skilled : Specialist
 How much energy will be saved with this measure: Low : Medium : High
 How much Carbon Dioxide emission will be saved with this measure: Low : Medium : High

Since heat rises it follows that heat loss through the roof is a large contributor to energy waste in your house. By installing modern 290mm thick insulation in your loft space you could save up to 25% of your heating bill but perhaps more realistically by 20%. By upgrading old thin insulation you may also be able to save an additional 7 or 8% of you bill.

The cost of installing the new thick insulation or of an upgrade is fairly modest at about £ 300 for a smaller house and about £ 450 for a larger house.

The savings you could make by only installing loft insulation are given in the table below with various fuel types and their currents costs. The payback time for various installation costs is given in the second table. The reductions in CO2 emissions from your property will also substantially reduce.

This table shows savings with installing modern approximately 290mm thick insulation and the reduction of carbon dioxide emissions for 4 different energy demands, Check your bills to see what you use.
Financial savings by installing loft insulation - per year
CO2 emission reduction - kg per year
Below average energy use for heating per year
smaller house or warmer area
Average energy use for heating per year
the average in the UK
Above average energy use for heating per year
larger house or colder area
Source of energy for heating Savings with
original energy use
10000 kWh
Savings with
original energy use
15000 kWh
Savings with
original energy use
20000 kWh
Savings with
original energy use
25000 kWh
⚡ Electricity £0.154 per kWh
£308 (734kg) £462 (1101kg) £616 (1468kg) £770 (1835kg)
⚡ Gas £0.043 per kWh
£86 (420kg) £129 (630kg) £172 (840kg) £215 (1050kg)
⚡ Off Peak Electricity £0.075 per kWh
£150 (734kg) £225 (1101kg) £300 (1468kg) £375 (1835kg)
⚡ LPG £0.058 per kWh
£116 (460kg) £174 (690kg) £232 (920kg) £290 (1150kg)
⚡ Heating Oil £0.043 per kWh
£86 (520kg) £129 (780kg) £172 (1040kg) £215 (1300kg)
This table shows the payback time for installing loft insulation based on the costs of the fuels used and various cost options for installing the insulation.
Source of energy for heating Insulation install costs
select yours.
Payback time with
original energy use
10000 kWh
(years)
Payback time with
original energy use
15000 kWh
(years)
Payback time with
original energy use
20000 kWh
(years)
⚡ Electric £0.154 per kWh
£0
£150
£300
£450
£600
0
0.5
1
1.5
1.9
0
0.3
0.6
1
1.3
0
0.2
0.5
0.7
1
⚡ Gas £0.043 per kWh
£0
£150
£300
£450
£600
0
1.7
3.5
5.2
7
0
1.2
2.3
3.5
4.7
0
0.9
1.7
2.6
3.5
⚡ Economy Electric £0.075 per kWh
£0
£150
£300
£450
£600
0
1
2
3
4
0
0.7
1.3
2
2.7
0
0.5
1
1.5
2
⚡ LPG £0.058 per kWh
£0
£150
£300
£450
£600
0
1.3
2.6
3.9
5.2
0
0.9
1.7
2.6
3.4
0
0.6
1.3
1.9
2.6
⚡ Heating Oil £0.043 per kWh
£0
£150
£300
£450
£600
0
1.7
3.5
5.2
7
0
1.2
2.3
3.5
4.7
0
0.9
1.7
2.6
3.5

Is it worth doing?

This is one of the single most cost effective things you can do to save money and the environment, with substantianl reductions in carbon dioxide emissions. The payback time is very short and the long term reward is great. There are some grants from energy companies and local authorities (check with your local energy advice centre). If you cannot get a grant, supermarkets are also offering good deals and DIY installation will also save a packet! It is almost insane not to insulate your loft and even "top-up" insulation offer a better payback than any renewable energy option.

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+1 # If you need a graphMelz 2013-02-04 17:01
esru.strath.ac.uk/.../... then go to page 6
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+1 # gcsesafari 2012-11-06 18:14
hi take a look at these sites if you are doing your gsce courseworkhttp: //www.confuseda boutenergy.co.u k/index.php/hea t-loss-and-insu lation/loft-ins ulationhttp://w ww.energysaving trust.org.uk/In sulation/Roof-a nd-loft-insulat ion/Loft-insula tion-materialsh ope they helped and good luck!
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+1 # Need help, ASAP!!!!Lola 2012-10-27 17:31
I need a detailed answer for my GCSE Science course work!!! Please can someone help!! :D

How does the thickness of the loft insulation affect heat loss??
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+5 # loft insulationlexi 2012-10-30 12:15
How does the thickness of the loft insulation affect the heat loss?
The thicker the loft insulation is the more heat loss will be reduced as if it is thicker the more air is trapped between the layers of insulation and thermal energy cannot pass through trapped air causing it to not leave the house. Different materials hold in heat at different rates. The higher the R-value of the material, the better it will be at holding heat in.

hope this helped im doing my science gcse too. here is some extra information about loft insulation:

What is Loft insulation?
Lo ft insulation is method for many people to make their houses energy efficient. To prevent heat loss, loft insulation acts as a blanket trapping rising heat in the house. Without loft insulation a house would loose 25% of heat through the roof. Using Loft insulation benefits many people as it reduces heating bills in an effective way. When combined with wall insulation, adequate heating and controlled ventilation loft insulation also helps to prevent the formation of surface condensation, damp and mould growth.
How does loft insulation prevent heat loss?
Loft insulation works by preventing the movement of heated air through the insulation material, by trapping the air in the fibres.
More detailed:
The ceiling is a conductor and energy is transferred into the loft. If there is no insulation, the air at the base of the loft warms up and then a convection current of warm air moves through the roof space and escapes through the tiles. If the loft is insulated, the air in the insulation cannot move around the loft by convection. Loft insulation acts like a blanket, helping prevent heat escaping through the roof. Convection currents can transfer heat energy in the loft to the roof tiles. It has trapped air which is a poor insulator.
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+1 # HELP ME NOWHELP 2012-10-08 08:36
need help with how the thickness of the loft insultaion affects heat loss
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+1 # HELP !!!mayesha 2012-09-26 13:21
Somebody pleqase answer these question. i need an answer ASAP. tnx xx :Dwhy is loft insulation needed?how loft insulatn reduce heat loss?how tha thickness of the loft insulaton affects heat loss?
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+4 # sciencenigel jones 2012-10-09 10:15
Loft insulation

I nsulating homes
You should be able to describe how heat energy is lost from buildings and to explain how these losses can be reduced.

Hea t is lost through:
• the roof - fit loft insulation
• windows - fit double glazing and curtains
• gaps around the door - fit draught excluders
• the walls - fit cavity wall insulation
• the floor - fit a carpet
Heat energy is transferred from homes by conduction through the walls, floor, roof and windows. It is also transferred from homes by. For example, cold air can enter the house through gaps in doors and windows, and convection currents can transfer heat energy in the loft to the roof tiles. Heat energy also leaves the house by radiation through the walls, roof and windows.
Ways to reduce heat loss
There are some simple ways to reduce heat loss, including fitting carpets, curtains and draught excluders.
Hea t loss through windows can be reduced using double glazing. There may be air or a vacuum between the two panes of glass. Air is a poor conductor of heat, while a vacuum can only transfer heat energy by radiation.
Hea t loss through walls can be reduced using cavity wall insulation. This involves blowing insulating material into the gap between the brick and the inside wall, which reduces the heat loss by conduction. The material also prevents air circulating inside the cavity, therefore reducing heat loss by convection.
He at loss through the roof can be reduced by laying loft insulation. This works in a similar way to cavity wall insulation.




Efficienc y and payback time
Efficienc y
Energy cannot be created or destroyed. It can only be transferred from one form to another, or moved. Energy that is ‘wasted’, like the light energy from a glowing electric fire, does not disappear. Instead, it is transferred into the surroundings and spreads out so much that it becomes very difficult to do anything useful with it.

A Sankey diagram showing the energy transfers in an electric fire
The efficiency of a device can be calculated using this equation:
Effi ciency = useful energy output ÷ useful energy input
The efficiency of the electric fire in the example is 90 ÷ 100 = 0.9
Note that the efficiency of a device will always be less than 1.
Payback time
The payback time of an energy-saving solution is a measure of how cost-effective it is. Here is the equation to calculate payback time:
Payback time (years) = cost of installation (£) ÷ savings per year in fuel costs
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+1 # sciencenigel jones 2012-10-09 10:16
What is loft insulation?
A board-type product, usually of low or medium density, made of mineral fibres, cellular glass, foamed plastic, wood fibreboard, one or both sides of which may be faced with another material; provides thermal insulation in a roofing system.
Why does loft insulation help prevent heat loss from homes?
Loft insulation contains trapped air which is a good insulator as the particles are not close together. This means that the heat energy can not be passed on through the roof as easily.
How the thickness of loft insulation does affect heat loss?
The thicker the loft insulation is the more heat loss will be reduced as if it is thicker the more air is trapped between the layers of insulation and thermal energy cannot pass through trapped air causing it to not leave your home.
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+1 # Loft InsulationPoppler 2012-11-01 14:13
Where did you get this info please?
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+1 # How Does Insulation Reduces Heat Loss?Cafe' 2012-09-13 14:27
How Does Insulation Reduces Heat Loss? please respond scientifically for my GCSE coursework
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+1 # read a bookRichard 2012-09-14 11:18
As a pre internet scientist I'm tempted to say read a book, but one has to admire initiative!

essentially insulating materials are poor thermal conductors. The density of the atoms and molecules in the materials greatly effects conductivity as heat is transferred effectively by 'packets' of energy moving from atom to atom. Metals are very dense and conduct heat very well and are not good thermal insulators. A Vacuum (the big bit in space or the bit surrounding a a thermos flask) is void of matter and does not conduct heat. air trapped in a woolly jumper or loft insulation is not a dense material and does not conduct heat well and so is a good insulator.

density is not the only factor by the way
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+1 # How loft insulation works!Cathy 2012-10-13 10:41
Well there are air packets that trap the air with in them, making it a poor conductor of heat. Meaning there isn't any air escaping, so the air alredy with in the home is traped in and the cold air outside is keeped out, leaving your home worm. xxx
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+2 # dear godWill 2012-11-04 15:37
Richards answer is correct. It stops conduction by trapping air molecules (air is a very good insulator of heat) and this means heat is less likely to escape out through the roof. Air passes heat energy badly because the particles are so spread to. When richard talks about the vacuum he is saying that there are almost no molecules for heat to get passed through. He has forgotten about radiation as a form of transferring heat though.
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