Goto main content
Table of contents
Obtain 3 free quotes for your insulation project
Attach a file

By submitting your project, you agree to our Terms of Use

Everything You Need to Know About Home Insulation

Last modified: 2020-02-21 | Approximate reading time 3 mins

Is your home poorly insulated? We at RenoQuotes have some tips and general advice to help you better understand the crucial role insulation plays within your home.

What to do in case of mould in your insulation?

If you find evidence of mould growth in your insulation, it is imperative that you take action to eliminate its presence as quickly as possible so as not to allow it to spread further. If nothing is done to remove its presence, it may eventually lead to serious health problems as spores can become airborne. In addition, adding insulation will not solve your mould problem, it may just accelerate it.

The thermal insulation of a house  

When it comes to thermal insulation, the air and vapour barriers are factors that must be taken into account. In the case of an older house which may be lacking these barriers, you will need to add them. We always recommend consulting with a certified contractor before you take any other action as it is possible in this case that a simple vapour barrier paint will sufficiently seal and improve the overall insulation.


Photo: Wikimedia

Looking for an insulation expert?

Fill out the form so that we can put you in contact with certified contractors from our network

Improving the energy efficiency of insulation

If there are openings in the roof allowing air or moisture to bleed in and out, the energy efficiency of your home will be significantly diminished. The roof is of particular importance because heat rises and this is the case for the vast majority of your home. If your house is poorly insulated, it will be particularly noticeable during the winter as you may experience freezing gusts inside. This would make for an unpleasant situation but would also point to a significant loss in heat.

During periods of extreme cold, your energy costs increase significantly as you heat your home. This is why it is ideal to make sure that the heat produced within your home is retained and keeps you warm at all times. Issues with your home’s insulation will cause moderate to severe heat loss which you ultimately pay for.

So, if the heat is being expelled through a weakness in the insulation, fixing the issue and installing effective insulation can turn out to be a worthy investment.

Keeping your attic tempered

Air circulating throughout the attic must be maintained at a steady temperature that is between the inside temperature of your home and the outside temperature. If the thermostat indicates that the attic’s temperature is the same as outside, this may indicate an insulation problem with regards to the roof.

On the other hand, if the temperature is similar to the interior of your house, this also points to an insulation problem in the attic. For instance, during the summer, if the outside temperature is 40°C and the indoor temperature is 20°C, then the temperature of the attic should be somewhere in between because the air conditioning in your home shouldn’t affect the attic temperature. It is important to insulate well but not to overdo it. Adding an excessive amount of insulation can create problems such as blocking vents and stifling ventilation in the attic.  


Photo: Wikimedia

The R factor of insulation

The R factor is one of the main attributes to consider when dealing with a home’s insulation. The higher the R factor is, the greater the insulation of your home.  In the case of insulating wool, generally speaking, one inch of insulation is more or less equivalent to an R factor of 3. This number applies to mineral wool and fibreglass which are both R3 and fibre cellulose which is closer to R3.7.

On the side of sprayed or injected insulators, polyurethane is in a league of its own with an R factor of 6 or 7 per inch. For areas of the attic which are not directly accessible, it is possible, and in some cases, recommended to use injected polyurethane. Instead of drying immediately, injected polyurethane takes about 10 seconds to set so it can seep deep into the bottom of the cavities before it starts to swell. Based on the Canadian standard, a house has an R factor ranging anywhere from 30 to 50. For more recently constructed houses an average R factor is about 60.

Get 3 renovation quotes for your insulation project can help you get quotes for your insulation project. If you submit your project to us, we’ll put you in contact with top-rated contractors. Fill in the form on the homepage (it only takes a few minutes), and you will get estimates from trusted professionals. 

Dial 1-844 828-1588 to speak with one of our customer service representatives


Looking for something else? Search here!



You have a project? let us help you.

Fill out this form to receive quotes from 3 certified contractors
Optional: It seems the postal code is missing. Your postal code helps us refer local contractors.

By submitting your project, you agree to our Terms of Use


You tell us about your project


We put you in contact with 3 certified contractors within 48 hours


You compare the different quotes and you save time and money

Number of projects submitted since 2014
Number of contractors in our network
Average time for an answer
One hour
*During business hours

Toronto - Calgary - Edmonton - Montreal - Ottawa - Vancouver - Halifax - Winnipeg - Windsor

© 2019


Follow us:


Partner sites: