How to choose the best insulation for your wall?

01/12/2020 By Roy Off

Insulating your walls is one of the best ways to help you reduce your energy consumption, and help you save money on your power bill. Installing high quality insulation in both your external and internal walls can make a significant difference in the livability of your home, not only by helping regulate heat, but also by providing acoustic benefits. 

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Types of insulation for your walls

There are several types of insulation that can be used in the walls, each with its own advantages.

  • Batts or blanket insulation products are a popular choice for both internal and external walls because they are easy to install and offer an effective solution to reducing heat transfer. 
  • Foam boards offer high insulating and compressive strength for relatively little thickness. Closed cell insulation boards help prevent the movement of air or water to slow down heat flow.
  • Reflective foil insulation can be used in external walls to help reflect radiant heat from the sun away from your home. This type of insulation is really effective at keeping your home cool in hot weather.

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What is the best wall insulation material?

The most common materials that wall insulation batts are made from are glasswool, rockwool and polyester. They are all effective at reducing heat transfer, but their properties vary slightly. The best insulation material for you will depend on the properties you want your insulation to have.

  • Glasswool is made from recycled glass materials and is very effective. It is easy to install and transport due to its high compression properties.
  • Earthwool is a type of glasswool manufactured by Knauf. It has none of the itchiness normally associated with glasswool, making it soft to touch and easy to handle. It is manufactured using ECOSE technology, which uses no harsh chemicals or artificial dyes.
  • Polyester products have no breathable fibres and aren’t itchy to touch. They are a great choice for people with asthma or other dust allergies. 
  • Rockwool is made from crushed rocks and is known for its impressive fire ratings. It is non-combustible, doesn’t produce toxic smoke and helps stop the spread of flames.

What R-value do I need for my walls?

Perhaps the most important quality of any insulation product is its R-value. The higher the R-value, the more effective a product is at resisting heat flow. So products with a high R-value will help you regulate the temperature inside your home more efficiently, leading to increased energy savings.