Rafter Insulation

Up to 30% of heating produced in a home escapes through un-insulated or a poorly insulated roof. Investing in high performing Rafter Insulation can not only save you money in reduced energy bills, but over time end up paying for itself over and over!

Do I need Rafter Insulation?

If you’re planning to make use of your attic space, or renovate it into an additional living space, your Rafter Insulation will need to meet strict building regulation standards. Generally, placing insulation in ceiling joists above the top floor will suffice if the room is for storage or other purposes. If you’re planning on making the room liveable, insulation will need to be placed at both joist and rafter level.


The effectiveness of insulation is graded using an R-Value, which measures the amount of heat that is conducted through a structure. A low R-Value represents quality, correctly installed insulation – as it should not allow much heat to pass through. Homeowners insulating at rafter level should aim to achieve an R-Value of 0.20W/M₂ or better.


The depth of your rafters and the particular solution you’re looking for will determine what materials you will need for your situation. Most insulation products used for rafters are semi-rigid boards or glass/mineral fibre batts. It’s important to speak with a qualified and reputable specialist who can tell you what products you need to use to achieve the R-Value you desire. They should also be able to tell you if you qualify for any help in the form of funding or government heating grants to aid in the cost of your Rafter Insulation.

Some considerations you may want to speak to your contractor about before committing to purchase installation include;

  • Any ventilation issues your home may have that may cause issues.
  • How much insulation you will need to install to achieve your desired results.
  • Fire resistance of their particular product.
  • Guarantees and lifespan of their products.
  • Additional work that may be your responsibility to undertake before or after installation, to ensure optimum performance of the product.

Thank You for your interest in insulation

Please fill in your postcode below and take our multi choice questionnaire to see if you qualify for any government grants, cash-back schemes or subsidised installations. Our team will then be in touch with you as soon as possible.

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Where do you live *

Home type *

Please select the RED home that resemble your house the most

How many storeys in your home *


Gas connection *

Are you connected to mains gas

Age of your home *


What does your wall most look like? *

How many bedrooms in your home *


Cavity Insulation *

Do you have cavity wall insulation

Loft Insulation *

Do you have loft insulation

How old is your boiler *


What is your boiler's brand name, model and type

Is there a fault with the boiler? *

Please choose what type of fault (select one or more)

Heating Fault
Hot Water Fault
Leaking Boiler
Ignition (Starting) Fault

Finally let's check if the government can help with some subsidies, cashbacks or grants

ECO Criteria

Child tax credit and have income of less than £15860
Working Tax Credit and have income of less than £15860
Income-related Employment and Support Allowance (ESA)
Pension Credit
Income support
Income-based job seekers allowance
None of the Above

Receiving a work related activity or support component
You receive support for a disability
You receive support for a child with a disability
You have a child under 5 years old
You have a child under 16
You have a child under 20 and in full time education
You (or your partner) receive a “Pensioner Premium”
I only receive the Employment and Support Allowance (ESA)

Privately Own your home
Privately Rent your home
Live in Council/Social Housing


What paid options are you interested in?

Bio-mass Boiler
Gas Boiler
Solar PV (Solar Electricity)
Solar Thermal (Solar Water Heating)
Heat Pump
Double Glazing
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