When Is the Best Time to Install Underfloor Insulation?

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Great question!  The answer is… it depends. 

Peak Season

Underfloor insulation is mostly installed during autumn and winter in Australia.  This is because the warmer months do not grab the attention of householders.  The first cold day arrives, particularly if it is a “cold snap” which focuses every householder on the fact that “Winter is Coming” – and they need to get organised – fast.  This can lead to frustration in the form of quality product shortages. If you are intending on having the product professionally installed, you may not be able to secure the services of the higher rated installation companies.  So plan ahead!  

Check the Weather

Professional under floor insulation installers will tell you that the ideal times to tackle underfloor insulation installation is during the milder season of spring and early autumn.  These seasons offer a great opportunity – it’s not too hot and it’s not too cold.   If you are running a DIY project, mild temperatures makes it more comfortable to work under your house.  However, as an ex-installer myself, I always liked the middle of a stinking hot summer day.  Underfloor was always nice and cool on those days. 

Take Advantage of the Off-Peak Season

For those considering a professional installation, the spring and summer are great times because they’re “off-peak” seasons. Not only could you potentially snag a better deal from an professional installer with a lighter work load, but you might also find that they have more flexible scheduling and shorter wait times as well.  

Beat the Extreme Weather

If your area experiences intensely frigid winters, plan to get your insulation sorted before then.  Installing insulation before extremely cold weather can help keep your home more comfortable and can start saving you money on energy costs right away.  If someone is standing in socks in your home, they can tell what parts of the floor have been insulated and what parts have not been insulated during the installation process.  It’s impressive.  

Sync It with Renovations

If you are undertaking underfloor insulation as part of home improvements, then the installation will occur as, and when, your builder says!  If you have the storage capacity, you can buy your underfloor insulation and store it ready for installation.  Sometimes the building timelines can go a little awry, so it’s good to have your insulation ready and waiting.  Last minute purchases can sometimes end up with sub-optimal product – just because it is the only product available.   Don’t waste the opportunity for a excellent outcome, because of a lack of planning means you had to use a pedestrian product rather than an excellent one!

Ultimately, the best time to install underfloor insulation aligns with your personal schedule and budget, ensuring it’s a manageable and cost-effective project. By planning ahead and choosing the right time, you enhance not only the installation process but also the lasting benefits, making your home a cosy and efficient space all year round.

People Also Ask:

Q: When is the best time to order my under floor Insulation?


A: Quality insulation can be in short supply during peak seasons.  So please order your insulation well in advance.  we have received many phone calls from  householders who want “insulation today” because the builder is coming “tomorrow”.  It is always disappointing for the householder when we cannot accommodate that timing. 

Q:  Should I sync underfloor insulation installation with other home renovations?

A:  It can be efficient to synchronise underfloor insulation installation with other home renovations, especially if you are using the same professional installation business to do so. 

If you are using different contractors to install underfloor insulation, it is better to leave this project until the end of any underfloor work.  Do restumping, removing heating ducts, or installing cabling first – then insulate your subfloor. 

If full scale renovations are planned, discuss insulation installation with your builder early to ensure it fits into the building timeline and that they are informed about the products you wish to have installed.  As underfloor insulation is a relatively new feature in the building landscape, many builders have not had exposure to the latest materials and installation techniques.   Here is your chance to show them!