Frequently Asked Questions

  • Will I need to make any preparation for the installation?
  • Can my loft be used for storage after the installation?
  • Can false ceilings be insulated?
  • Can loft insulation still be installed if I have down lights?
  • Will a low roof prevent the installers from fitting the insulation?
  • Is all insulation the same?
  • What about the tanks and pipes in the loft?
  • What materials do you use for the installation?
  • Do I have to clear the loft area before installation?
  • How long will the work take?
  • Is decoration included in the grant for room in roof insulation?
  • Is it truly free?
  • What about the light fittings, skirting boards, radiators and sockets when doing room in roof insulation?
  • Do I need a survey?
  • Do I have to do anything before cavity wall installation?
  • If I'm in rented accommodation can I still get the grant?
  • Why do energy suppliers provide this?
  • Do I Need to contact my utility provider?
  • CIGA (Cavity Insulation Guarantee Association)
  • Do I apply for the CIGA 25 Year Guarantee?
  • How can I find out if my house is suitable?
  • Will my home be warmer after the installation?
  • How long does the installation process take?
  • How long does cavity wall insulation last?
  • Will the installation technician have to come into the house?
  • Are the installation technicians trained?
  • Will the drilling damage walls?
  • How will I know that the walls have been filled properly?
  • What about filling the holes — my house has painted areas?
  • Does the cavity wall insulation have a warranty?
  • What type of insulation material do you install?
  • what about the ventilators which are in the external wall?
  • Will the insulation fall into my neighbours property — my house is a semi detached property?
  • Do I need to be at home for the installation?
  • Is any house suitable for cavity wall insulation?
  • What is a cavity wall?

The installers need unrestricted access to the loft — please remove items stored in the loft. If you have only a small number of objects stored then the installers will be able to work around these.

No, you cannot compress the insulating material as this causes it to lose its thermal qualities. The material is cross laid, you will have a layer of material between the joists, with another layer fitted 90° to the first layer, over the tops of the joists.

Normally it's not possible to insulate a false or suspended ceiling as there is no safe access for the installers. The House Wrapped surveyor will advise an alternative way of installing the insulation if possible.

Yes, we can still install loft insulation if you have down lights fitted through your ceiling. Our installers will simply cut around the light fittings and make sure that the downlighter is covered with a cap.

Our House Wrapped Surveyor will look in your loft to check for any access issues at the time of the survey.

No, there are several different types of loft and cavity wall insulation. All insulation materials have been tested, assessed and approved by the British Board of Agrement and the Energy Saving Trust. Go to our cavity wall insulation page or our loft insulation page for more information.

We need to make sure that your tanks and pipes are properly insulated. The installers will fit new insulation if your existing pipe and tank insulation is not up to the required standards. We will also fit insulation material to the back of the loft hatch.

We use mineral fibre rolls manufactured by Knauf Insulation which are fire retardant which are normally opened in the loft which prevents any mess in your house.

If your loft area is full of personal belongings then most of it will need to be removed. We are however able to complete the assessment/survey before you empty the room though.

Cavity wall insulation normally takes around 3-6 hours to install but depends upon house size, materials used and other factors, such as access.

No, however the walls and ceiling are left in a plastered finish, ready for any redecoration works to be completed.

Only if you are in receipt of one of the qualifying state benefits. To read more about ECO3 which started in October 2018 please Click here.

Because room in roof insulation usually involves overboarding which is the process of placing 5cm insulation with plasterboard attached to the walls it means that some sockets, pipes and switches will need to be moved.

Yes, all cavity wall and loft insulation measures require a survey. However, there is no charge for this service.

Sometimes the drilling process can cause slight vibrations so it might be wise to remove pictures from external walls. The installation technicians will need access to all areas of the house including conservatory, garage etc. Any mess created outside will will be cleared at the end of the job.

Yes, tenants can receive ECO funding, however, you will need the permission of your landlord.

The big 6 energy companies are obliged by the Government to make UK homes more efficient by offering grants and incentives to households to reduce carbon emissions. The UK goverment has committed to reducing carbon emissions by 80% by the year 2050.


A CIGA guarantee will be posted to your home address approximately 6 weeks after install.

No, House Wrapped (or the Agent) will submit the Guarantee application.

Our surveyor will check the suitability of your cavity wall by placing a small camera into the walls. The surveyor will also check the depth of your current loft insulation whcih needs to be below a certain depth to qualify.

Yes, your whole house will definately feel the benefit, especially rooms not controlled by a thermostat. Approximately 30% of heat generated is lost through uninsulated walls.

Properties take around 3-6 hours, but it depends on the size of your home and whether there are any access restrictions.

For the lifetime of the building according to the British Board of Agrement.

The installers will need to perform several checks before and after the installation. So it is important that they have access inside the property.

All installers undergo training by the system supplier to ensure they are competent to carry out cavity wall and loft insulation.

The installers will fill the injection holes with mortar to match the existing finish as closely as possible. He will use a mix that matches the existing colour and texture. On pebbledash walls the installer will texture the mortar to match the pebbledash. After weathering, the holes will be difficult to see.

Our installers drill out a defined pattern of holes and this ensures that the insulation fills all wall areas properly. They carry out a density check using a test box to make sure that the machine is blowing the material at the correct level. Once the cavity wall insulation is completed the installer will arrange with a technical Surveyor on your behalf to visit your property and carry out a compliance check.

The Technician will fill all the injection holes with mortar to match the existing as closely as possible. He will use a mix that matches the existing colour and texture. After weathering, the holes are difficult to see.

Yes – a Guarantee is provided by CIGA (Cavity Insulation Guarantee Agency) – this is a 25-year guarantee and applies to the property, not the person, so you need to safeguard it along with other documents for your property. You will need this document if you sell your house. The insulation company will apply for this guarantee on your behalf which will be deliver directly to you.

Either KNAUF glass fibre or mineral wool. These materials allow the walls to breathe sufficiently and are waterproof so no water can ”soak” through the material. Pollypearl bead can also be used.

Ventilators supplying combustion air to fuel burning appliances must be safeguarded. Similarly ventilators at ground level that ventilate below timber floors must be safeguarded. The Surveyor/Technician will investigate them to check they are already sleeved. If they are not, the Technician will remove them and seal around them to stop them being blocked by the insulation. Other vents, which may be redundant, such a cavity vents or vents that used to supply air to open fires in bedrooms may be closed off. The Surveyor/Technician should discuss these with you. Unused airbricks may be filled.

No – if your neighbour's house is already insulated then our material will stop where it meets. If it is not already insulated, the installers will fit a barrier at the party wall line, normally made from bristle brush. This will prevent any material entering your neighbours cavity.

Yes. The installers will need to check for any gas fires or any other gas appliances as well as the internal walls to check for damp or severe condensation.

No. If the house is not of traditional construction then the house will not be suitable. The following types of property are not suitable for cavity fill: steel frame, timber frame and random stone. ( Some stone houses do qualify )

The external wall of a house is constructed of two masonry (brick or block) walls, with a cavity space of between 40mm to 120mm depending on the type of house.

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