Custom Cut Value Poly Underfloor Insulation
For awkward joist widths when turn-and-tear is not your idea of a good time.
Most underfloor insulation jobs use standard 450mm wide Value Poly, which is designed for joists with a 430mm gap between them. The extra 20mm gives the insulation enough width to sit snugly between the joists and be stapled into place properly.
That snug fit matters.
And if it is bunched, squashed or loosely fitted between the joists, it can leave gaps for cold air, reduce thermal performance, and make it easier for rodents to get into the space above the insulation.
But not every home has standard joist spacing. Some homes have the odd awkward bay. Some have joists that vary from room to room, and some appear to have been built by someone who did not carry a tape measure.
For those situations, we usually recommend turn and tear.
When to consider custom cut for your insulation
Turn-and-tear is how professional installers deal with variable joist spacing. The insulation is turned, torn to the width needed, and stapled neatly into the joist bay. It sounds a bit challenging, but it is a professional installation method, and usually adds around 15% more time than a standard install.
So before you head straight for custom cut insulation, it is worth thinking carefully.
If you only have a few awkward bays, turn-and-tear is almost always the better option. If your joist spacing varies all over the place, turn-and-tear is still likely to be more practical than custom cutting.
But if you have a large area with the same non-standard joist spacing, we can arrange custom cut Value Poly to suit your required width.
This is not a quick or standard option, and it is definitely not for one annoyingly spaced joist bay.
But if you have 100m² or more in the same odd width, custom cut Value Poly may save you a lot of turning, tearing and muttering under the house.
Custom cut rules
Locations: Victoria and Perth ONLY
Minimum order: 100m² per custom width
Custom cut set up fee: $400 per custom width
Delivery: to your door only
Pickup: not available
Returns: not available
Timing: not a rush order
If you need two different widths, each width needs to meet the 100m² minimum, and each width attracts a separate $400 custom cut fee.
You cannot combine widths to make up the 100m².
So:
Yes - 100m² at 410mm wide
No - 50m² at 410mm & 50m² at 430mm
Yes - 100m² at 400mm & 100m² at 490mm
Is custom cut right for you?
Custom cut may make sense if:
- your joist spacing is non-standard
- that same non-standard width repeats across a large area
- you need at least 100m² in that width
- you want to avoid turn-and-tear
- you are not in a hurry
Stick with standard Value Poly and turn-and-tear if:
- you only have a few awkward bays
- your joist widths vary all over the place
- your job is under 100m²
- don’t want to wait longer than normal
Custom cut has to be fitted into the manufacturing schedule. If your installer is coming tomorrow, this is not the product. Turn-and-tear is your friend.
Measure carefully
Custom cut insulation is made to your measurements. That means no returns if the width is wrong, the joists are different from what you thought, or the house has pulled one of its little surprises. Measure properly across the whole floor. Then measure again.
Polyester underfloor insulation should be 20mm wider than the space between the joists. For example: if your joist space is 350mm your ideal insulation size 370mm.
Ready to ask about custom cut?
Contact us:
* by chat on the store
* via email to sales@ecomaster.com.au
* call 1300 326 627
With the following information
- the custom width you need
- the square metres required
- your delivery address and contact details
- any other widths you are considering
We will let you know what is possible.
Sorry team - custom cut underfloor insulation is not available with Polymax Underfloor Insulation, only Value Poly in Victoria and Perth.
Non Toxic
Not impacted by water
Proudly Made in Australia