Cavity Wall Insulation Suitability
Reducing heat loss from the home will help to keep a house warmer at a lower cost also, cavity wall insulation is a specialist job and can only be carried out by an approved company also the insulation materials themselves and their installation are also subject to registered by authorised body. Our System is CWI18 White wool under 15/5257 approved.
The first thing you need to find out is what sort of walls you have. there are two main types of wall construction to be found in houses in the UK, Solid walls or cavity walls:
• A cavity wall is made up of two walls with a gap in between, known as the cavity; the outer leaf is usually made of brick, and the inner layer of brick or concrete block.
• A solid wall has no cavity; each wall is a single solid wall, usually made of brick or stone.
If your property is exposed to driving rain. Installing cavity wall insulation in this instance can create damp issues on the inside of the property, since the cavity can now no longer drain the water.
Benefits of cavity wall insulation
Does the Technician have to come into the house?
Yes, The Technician must undertake checks before and after installation, including any heating appliances, so it is essential that they have access inside the property.
What is your material?
CWI 18 cavity wall insulation,a granulated glass mineral white wool fibre material
Thermal properties — the product has a declared thermal conductivity* (D) of 0.040 W•m–1•K–1
How is cavity wall insulation installed?
The cavity wall is injected with insulating material by drilling holes in the external wall, through the mortar joint. Holes are generally of 22-25mm diameter and are ‘made good’ after injection. Each hole is injected in turn, starting at the bottom.
Do I have to do anything before the installation?
The drilling process does create some vibration – so it would be wise to remove ornaments, particularly on external walls, for their safety and your peace of mind The Technician will need access to all walls, so he will need to get inside attached garages, lean to sheds, conservatories etc. The insulation can only be really effective if all walls are done. If you have a wall right on the boundary, you may like to mention to your neighbour, that the Technician will need to go onto their property.
The drilling process inevitably creates a little dust, which will be cleared at the completion of thejob. It may be wise to remove vehicles from the drive and things close to the walls. This will alsogive the Technician better access for equipment and tools.
What about filling the holes and painted areas?
The Technician will fill all the injection holes with mortar to match the existing as closely aspossible. He will use a mix that closely matches the existing colour and texture. On pebbledashfinishes, he will apply pebbles to the surface to match the existing finish. After weathering, the holes are difficult to see. Normally, we will not paint the injection holes. Unfortunately, even if the original paint is used, it may not match due to weathering. So, it may be necessary for you to consider painting the area, after the mortar has dried.
What about the ventilators that are in the external wall?
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 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 maybe closed off. The Technician should discuss these with you. Redundant airbricks may be filled.
How long does it take?
Cavity wall insulation normally takes around three hours to install, but the time does depend on the size of the house and other factors, such as access, cavity barriers, fitting corevent… etc.
Is my house suitable?
Our assessors will undertake an assessment of your property to confirm that it is suitable for insulation. It is a full borescope survey by drilling a hole in your wall and checking it with a camera to see it is suitable.
How long will the insulation last?
For the life of the building
Are there any maintenance or servicing requirements?
No, not to the cavity wall insulation, but normal building maintenance is needed
Do I apply for the CIGA 25 Year Guarantee?
No. We will provide a CIGA guarantee for cavity work carried out.
Guarantees and Warranties
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 keep it safe with other documents for your property. You may need this document if you sell your house.
What is our customers say about us
I am delighted with the results… Overall process smooth and easy. I would recommend this company to anyone who is thinking about insulation.
After enquiring how to upgrade the insulation in my house, what a fantastic service shelter offered for loft insulation, loft boarding, loft hatch, loft ladder… excellent quality and no hidden costs or anything. If you need anything regarding loft matters please contact them