The importance of closing your home’s thermal envelope

We’ve all experienced days when it’s ridiculously cold outside and it’s horrendously difficult to heat your home. Likewise, I’m sure you recall stupidly humid days in summer when it’s incredibly tough to cool the home down! This happens because the inside of your home is like a little atmospheric bubble, with air inside always trying to equalise itself with the outside temperature.

Your home’s insulation helps to provide a barrier that makes it difficult for air to escape from your home. It helps keep the inside temperature warmer or cooler for longer and helps to reduce the effort it takes to control the air temperature. In New Zealand homes, however, homes are generally only insulated to the minimum standards, which usually means a difficult and costly process for heating and cooling your home.

When you think about insulation, you usually think about the stuff they put in the roof and sometimes under the floor. What you may not realise, however, is that for most New Zealand homes there is little to no insulation in the walls and this creates a gap in your home’s thermal envelope.

So, what is a thermal envelope anyway?

The thermal envelope is a barrier created from all the different products and materials used in the construction of your house. This barrier helps protect the inside environment from the outside climate. Everything from your roof and concrete slab to your windows and insulation help to make up this barrier. Unfortunately, even the best-built houses often leave gaps or weak points that allow air to escape in and out of the home, with your walls being responsible for up to 30% of your home’s heating and energy loss.

If you think about it there are a lot of ways the air can escape through your walls. If your windows are thin, there are gaps in and around your doors, or if your walls are not well-insulated air can easily escape. The break in your home’s thermal envelope means that any effort you put into heating or cooling your house is quickly lost. However, there are things you can do to plug the gaps!

To remedy areas that could be a big part of the problem start with your windows. Replacing old thin window glass with new double-glazed windows helps to trap air inside, preventing it from escaping. Changing old wooden doors with better joinery can also help. The main issue for most houses however is the lack of wall insulation so, the best way to fix your thermal envelope is to ensure your walls are well insulated!

CosyWall Insulation is specifically designed to be blown into the walls of your home without having to remove the internal linings! The process is incredibly simple and an experienced installation team can usually have the job done in a single day. CosyWall Insulation is made up of loose cellulose fibreglass which is completely safe and poses no health risks to the family. It’s blown into your walls from either the inside or the outside through small holes which are then patched up and repainted so you’ll never know the process was done.

The insulation is blown at such a high density that it will never shrink or slump over time and with an expected 50-year durability, CosyWall Insulation will last the lifetime of your house! CosyWall has been installed in New Zealand homes for over 20 years and we have had countless customer testimonies advocating what an amazing difference it has made to their homes. If you would like to learn more about CosyWall Insulation just send us a quick message and one of our team will be right back in touch.

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