Joisties | Steel Joists

Always check specifications for this product and watch our 5 Part step-by step installation videos.

Each Joisties board is 1-metre in length. There are 20 Joisties in each box, which covers 20 lineal metres of joists.

First, work out how many Joisties you need. Measure the length of joists in your steel framed floor. Multiply this by the number of joists to get the total lineal metres required. Make sure you check for areas with different length joists.

It’s helpful to draw a diagram showing the length and number of joists in each floor section.

What you will need:

• Adequate Joisties to cover all joists.
• Utility knife.
• Tape measure.
• Pencil.
• Diagram with dimensions of floor joists.
• 2 Joisties Fitting Tools.
• Joisties Adhesive.
• Polyester insulation rolls to fit between joists

Hacks:

• You need at least 40cm of crawl space to install underfloor insulation.
• Use a sharp utility knife to cut Joisties to length, or to fit around pipes and wires.
• When trimming Joisties, lay another Joistie over the top of the Joistie to be trimmed, to use as a guide and create a neat square end.
• Use Joisties Fitting Tools and Joisties Adhesive for best alignment and installation.

How to videos:

There are 5 parts to installing Joisties. We have broken each part out into a separate video to make it as easy as possible for you to undertake your own installation, just like a professional.

• Part 1: Overview of Joisties
• Part 2: Using the Joisties fitting tool
• Part 3: Using the Joisties adhesive
• Part 4: Fitting the Joisties
• Part 5: Fitting the Polyester Insulation

Q: What are Joisties made of?
A: Joisties are made of polyester fibres compressed into a firm board. 

Q: What R-Value are Joisties?
A: Joisties provide the standard thermal break for steel building elements of approximately R0.2 

Q: Why do I need insulation as well as Joisties?
A: Joisties insulate the steel joists and hold the insulation in place. Joisties do not insulate your floor, they only insulate the joists themselves. You will still need bulk insulation to put between the joists.  

Q: How do I install Joisties?
A: Click the How To tab to watch the installation videos 

Q: What’s so special about the Joistie adhesive?
A: The Joistie adhesive has two very important qualities. Firstly, it’s low VOC. This makes it safe to use even in low ventilation spaces. Secondly, it has a very high “grab” so that means that once you stick the Joistie up, it will stay up. That makes it easy to get the job done. 

Q: Can I use Liquid Nails instead of your more expensive adhesive?
A: Yes you can but we don’t recommend it. It will be much messier and take much longer.  Liquid nails will not hold up a Joistie straight out of the cartridge. You will need to undertake the “contact adhesive method”. That is, apply the adhesive to the Joistie, stick it up, take it down, allow the adhesive to go tack free, (5 to 10 minutes) and then re-stick the Joistie up.  Also, Liquid Nails is high VOC so is not safe in a low ventilation space. 

Q: Must I use your Joistie fitting tools?
A: No, you can fit Joisties without the fitting tools. Aligning the Joisties along the joists so that they support the insulation on both sides of the joist will be much harder without the tools, but it can be done. 

Q: How long does it take for the Joistie adhesive to set?
A: We recommend you leave it at least 24 hours before fitting the polyester underfloor rolls. 

Q: How can I trim Joisties to length or to go around pipes and wires?
A: Joisties are easily cut with a sharp utility knife. When trimming to length, use another Joistie lapped over the one you are trimming. This will provide you a square guide to trim by.  Rebates are also easily cut using a knife. 

Q: How many Joisties are in a box?
A: Each box contains 20 Joisties. Each Joistie is 1m long so one box will cover 20 lineal metres of joists. 

Q: How can I work out how many Joisties I will need?
A: Each Joistie is 1m in length. Measure the length of the joists and multiply by the number of joists to get the total lineal metres required. There will likely be sections of your floor with different length joists. It’s a good idea to make a sketch and write on your drawing the length and count of joists in each section of floor. 

Q: How do I know how much adhesive I will need?
A: One cartridge of adhesive is enough for about 30 Joisties if you follow the recommended pattern of adhesive. It’s prudent to order an extra tube just in case you over apply adhesive. 

Q: Are the powerful magnets on the fitting tools safe?
A: Under normal circumstances the magnets are safe. If you have a pacemaker or other bodily electronics or artificial joints it’s best to check with your medical professional first.

How are Joisties shipped?

Joisties, Joisties Fitting Tools and Joisties Adhesives are normally dispatched via Australia Post. Usually this takes about a week but can take longer. It’s best to plan ahead.

If you live in Victoria and ecoMaster is delivering your Underfloor Insulation then we can also deliver your Joisties at the same time. 

Where  can you deliver to?

Delivery via Australia Post is available to most locations with the exception of the Northern Territory and very remote areas.  If in doubt, give us a call on 1300 326 627 or contact us here. 

Can I collect?

Please click this link for the Click and Collect details.