Structural support, alignment, and accuracy, built in every stage of the job.
Whether you’re working on a large commercial development or a critical infrastructure project, getting the details right is non-negotiable. That’s where shims and packers come in.
These small, load-rated components are essential for alignment, stability and compliance on site. Used to fill gaps, distribute load and fine tune positioning, they keep the structural integrity of everything from cladding panels and door frames to steel beams and precast concrete.
In this guide, we break down what they do, why they matter and how to choose the right ones for your job.
What are Shims and Packers?
Shims and packers are thin, flat or U-shaped pieces made from plastic or metal. They’re used in construction to:
- Fill gaps between surfaces
- Adjust and level structural elements
- Support loads evenly
- Maintain spacing for compliance and drainage
- Prevent movement over time
They’re critical for ensuring materials are properly aligned, loads are supported across their full bearing surface, and finishes look clean and professional.
At PP Shim, we supply a full range of plastic and metal shims for structural framing, facade installation, joinery, glazing and heavy industrial builds, all made in Australia and tested for strength and compliance.
How Do They Support Structural Integrity?
Load Distribution
Uneven surfaces and point loads can compromise safety. Packers help create a stable foundation by spreading weight evenly and removing pressure points. This is especially important under heavy steel, precast panels or machinery where localised stress could cause cracks, sagging or failure.
Alignment and Levelling
Correct alignment isn’t just about aesthetics, it ensures structural elements can bear load correctly. Whether you’re installing windows, cladding or steel supports, shims help eliminate gaps and misalignment, keeping tolerances within spec and reducing stress on fixings and frames.
Precision and Adjustability
No site is perfect. Variations in slab height, wall plumb or beam placement are common. Shims and packers allow quick, fine-tuned adjustments on the fly, without tearing out or reworking installed materials. That saves time, reduces waste and keeps projects moving.
Types of Shims
We manufacture and supply a wide range of shim types, each for different applications:
Best Practices in Using Shims and Packers
Plastic Shims
Non-corrosive, moisture-resistant and colour-coded for quick thickness ID. Ideal for external use, structural framing, cladding and wet areas.
Brass Shims
Durable and corrosion-resistant, often used where conductivity or non-sparking materials are required.
Copper Shims
Malleable and corrosion-resistant. Used in electrical, marine or high-precision industrial applications.
Slotted Shims
Pre-slotted for positioning around bolts and anchors without needing disassembly. Speeds up installation in tight or awkward spots.
Custom Shims
We offer laser-cut or water-jet custom shims made to exact specifications. We also produce stamped metal washers and shim stock in-house.
Packing Shims
Structural packing between load-bearing members is handled by our steel packing shims, with 304 stainless steel shim stock where corrosion is a factor.
Need something non-standard? Call us on (02) 4646 1166 for a custom shim quote.
Best Practice: Using Shims and Packers On Site
Correct use is just as important as material selection. Here’s what to keep in mind:
- Always select load-rated products for structural applications
- Match shim or packer thickness to the gap or tolerance required
- Place evenly under the load to prevent tilting or shear stress
- Avoid timber shims in wet or exposed areas, plastic or metal lasts longer and won’t rot
- Record shim locations for ongoing inspections or future maintenance Inspect during works for any movement or stress issues
PP Shim products are designed for consistent performance, even under heavy loads and changing conditions.
Trusted by Builders Across Australia
We’ve been supplying Australian builders, engineers and contractors for decades, from commercial fit-outs to infrastructure projects.
Why work with PP Shim?
- Australian-made shims and packers for consistent local supply
- Fast turnaround on orders, including custom-cut parts
- Experience across industries, construction, infrastructure, manufacturing
- Support and advice from a team who understands site requirements
Whether you need bulk packers for a high-rise or just a few custom shims for a tight tolerance application, we can help.
Order Plastic or Metal Shims Today
We supply construction sites across Australia with load-rated, compliant shims and packers, ready for immediate delivery.
Get in touch online to discuss your project requirements, get expert advice on product selection and sizing or request a tailored quote.
Frequently Asked Questions
Are Your Plastic Shims Structural?
All our plastic shims are load-rated and meet Australian standards.
Do You Do Custom Sizes?
Yes, we can laser-cut or stamp custom shims to your drawings or specs, for non-standard or retrofits.
Do You Supply in Bulk?
Yes, we supply nationwide and dispatch large quantities for commercial and industrial projects.
What Material Should I Use?
Plastic for general construction, brass or copper for specialist or electrical applications, stainless steel for corrosive or exposed areas. We can advise if you’re unsure.
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How to Order in 3 Easy Steps
1. Contact
Let us know your requirements, and our team will assist you.
2. Quote
We’ll provide pricing based on your specifications.
3. Delivery
Have your order delivered or collect it from our head office.
