FAQ – Loft Insulation

Question 1

How does loft insulation work?

Accepted Answer

Loft insulation works by creating a thermal barrier that reduces the transfer of heat between the inside of a building and the outside environment. It’s usually installed in the loft or attic space, directly beneath the roof. The primary goal of loft insulation is to improve energy efficiency by minimising heat loss in the winter and heat gain in the summer.

Question 2

What are the benefits of loft insulation?

Accepted Answer

Insulating your loft is a fantastic way to reduce heat loss in your property. The insulation acts as a barrier, helping to retain the warmth generated within your home and reducing your energy bills. It helps to maintain a more consistent and comfortable indoor temperature, reducing the need for heating in the winter and cooling in the summer. An energy-efficient home with proper insulation is often more attractive to potential buyers and therefore may contribute to an increase in the value of your property.

Question 3

How much energy can you save by insulating your loft?

Accepted Answer

The amount of energy you can save by insulating your loft depends on various factors, including the existing insulation, the climate where you live, and your heating habits. On average, it’s estimated that a well-insulated loft can result in energy savings of up to 10% on your heating bills.

The specific energy savings will vary, but loft insulation is generally considered a high-impact, cost-effective measure to enhance the energy efficiency of your home.

Question 4

How much heat is lost through draughts?

Accepted Answer

Draughts (or air infiltration) are often one of the biggest sources of heat loss in a building. In a typical ‘unimproved’ period building (one that has not had modern insulation measures applied) we estimate the draughts cause approximately 30% of total heat loss. To accurately measure the sources and rate of draughtiness (or air infiltration) an air pressure test is required.

However, most occupants know where the draughts come from and where they are worst because they can feel it! Windows, doors and chimneys will normally be responsible for the majority of the draughts. Mitchell u0026 Dickinson’s surveyors will help you identify the draught sources and their contribution to your building's thermal performance.

Question 5

Can loft insulation reduce damp in my property?

Accepted Answer

Yes, damp is caused when insufficient insulation leads to temperature differences between the indoor air and the loft space. When warm, moist air from inside the house comes into contact with the cold surfaces in the loft (such as the roof or walls), it may lead to condensation. This can contribute to dampness and create an environment conducive to mould growth.

Good quality loft insulation and adequate ventilation is crucial for maintaining a balanced moisture level in the loft space. Without proper ventilation, dampness may become a problem.

Question 6

What different types of loft insulation are available?

Accepted Answer

There are several different types of loft insulation available, including fiberglass insulation, mineral wool insulation, cellulose insulation and reflective foil insulation. One of the most eco-friendly types of loft insulation is made from natural sheep’s wool.

Question 7

What are the benefits of sheep’s wool loft insulation?

Accepted Answer

This natural and eco-friendly material has many beneficial properties including a 60-year life compared to 15 years for glass wool, and an increase in insulation properties in damp conditions.

Products such as Mitchell u0026 Dickinson’s eco-friendly sheep’s wool loft insulation are treated with natural borax to prevent damage from pests, are not irritating to skin or respiratory systems, support British sheep farmers – improving economic resilience – and use little energy in manufacture. Sheep’s wool insulation is also biodegradable, reducing its environmental impact at the end of its lifecycle.

Question 8

Do I need a professional to help me install loft or ceiling insulation?

Accepted Answer

While it is possible to install loft insulation yourself, it’s often worth hiring a professional to ensure it’s installed correctly and effectively. They will be up to date on the latest building regulations and will have the correct specialised equipment to complete the job. They’ll also have knowledge of achieving the desired thermal resistance and understand the required density and thickness of the insulating material.

Question 9

Is it also possible to insulate sloping ceilings?

Accepted Answer

Yes, and we recommend that you do because sloping ceilings have very high heat loss per square metre. This is because they usually consist of a sheet of plasterboard, a 100mm ventilated gap between the rafters, then battens, felt and tiles. If you compare this to an 18-inch wall or 12 inches of loft insulation, it becomes clear how little insulating effect they have, making them responsible for the coldness you’ll often find in these rooms.

Mitchell u0026 Dickinson’s sloping ceiling insulation consists of thermal laminate boarding, a high-efficiency insulation board with plasterboard attached which is applied to the underneath of the sloping ceilings by screwing through to the rafters. Gaps around the edges are then filled and the whole area re-plastered.

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