Fibreglass Cast Services

Orthotics Plus provides professional fibreglass casting services for people who have sustained a fracture or injury.

Applying a cast is important because it acts to immobilise the fracture site in order to facilitate the healing process. Padding is added underneath the cast to make it comfortable while still allowing it to conform well to the body.

We provide acute fracture supports for all areas of the body. In most cases, our patients are seen on the same day as booking, with next to no wait times. We offer both waterproof and non-waterproof options.

Orthotics Plus has multiple clinic locations throughout Melbourne and we look forward to your referral.
View Clinic Locations Call (03) 9077 6414

Orthotist, Honor Murdoch wearing a fibreglass cast on her right wrist.

Types of Fractures Fibreglass Casts Are Used For

Fibreglass casts can generally be used on any limb fracture and are commonly used for:

  • Distal radius fractures (wrist)
  • Scaphoid fractures (wrist)
  • Midshaft radius (forearm)
  • Ulna fractures (forearm)
  • Midshaft tibia (lower limb)
  • Fibula fractures (lower limb)

Casts are typically applied 5-10 days following the date of fracture. Until that time, the body is reacting to the injury. Swelling around the limb could prevent the cast from properly conforming, so it’s common to wait until swelling subsides before applying the cast.

During this time a plaster backslab or temporary splint may be applied. Please note: Most of the modern-day casting materials aren’t actually fibreglass, rather synthetic materials and sometimes fibreglass and polymer mixed, however, to use colloquial terms we will still refer to synthetics casts as ‘fibreglass casts’.

Close up of a young man's fiberglass / Plaster leg cast and toes after a running injury

Caring for Your Cast

Before applying the cast, our Orthotist will spend some time discussing your daily activities to understand which casting option is best and if we should consider a waterproof option.


Generally, for an upper limb fracture, we try and keep our casts slim and comfortable to keep weight down and improve comfort.

Over time as the fracture heals the patient may find it possible to do more with the affected limb and can begin day to day activities if pain is not excessive.

However, lifting heavy items, excessively loading the fracture site and playing sport in the cast is not suggested.

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For a lower limb fracture, typically, there will be a period of zero to minimal weight-bearing, and which gradually increases as the patient rehabilitates and returns to walking. Our weight-bearing lower limb casts can tolerate weight-bearing but should be combined with appropriate footwear such as an overcast shoe

The ability to put weight through the injury will vary depending on the condition and the type of cast used, which we will discuss with you during the appointment.

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Soap, Deodorants, Moisturiser

Patients will commonly ask about using moisturisers or deodorants underneath the cast.

Generally, this should be avoided. With a waterproof cast, soap may be used inside the cast for basic cleaning if needed as long as it is thoroughly rinsed.


The waterproof cast padding that our clinic uses also causes little to no itching. We rarely receive comments from patients that their casts have been itchy. This combined with the ability to wash and rinse the cast greatly improves comfort, especially during the warmer months.

In the event you experience itching, please contact us.

Asian girl is sleeping on blue bed in bedroom.Ankle strap for treating torn wound of foot injury. On the blue floor.Foot and ankle strap protects against injury.Do not focus on objects.


Most patients are able to sleep relatively comfortably in a cast.

With a leg cast, there may be instances where it could scratch against the other leg during movement while sleeping. To prevent this, we recommend placing a pillow slip over the cast to avoid exposure to the fibreglass material.

Discomfort, Damage & Repairs

 If you experience any discomfort, or if the cast is rubbing, we may be able to tweak the design.

If the cast is damaged at any point, we are also happy to repair it free of charge (although this is very rare).

Closeup of asian man's arm with long arm plaster, fiberglass cast therapy cover by blue elastic bandage after sport accident. Appropriate treatment in western medicine.


Casts will be removed using a cast saw, which is conducted by our Orthotists in a follow-up appointment. This is a quick, safe and painless experience.

Patients can expect to wear a cast for 4 to 10 weeks depending on the condition and type of fracture.


While wearing the cast it is important to look after your fracture and not put excessive load or stress through the fracture. This will also protect the cast from excess wear and tear.

Advantages of Fibreglass Over Plaster

When considering fracture management, fibreglass has many advantages over plaster.

  • Fibreglass is generally a much stronger and lighter material that provides equivalent stability as a plaster cast
  • Fibreglass casts can also be made waterproof, which is not the case with plaster

One disadvantage with fibreglass is cost. The material is often more expensive, so larger facilities, such as hospitals, will use plaster instead. Fibreglass can also be more challenging to mould than plaster.

Orthotics Plus is trained and knowledgeable in all types of casts and their suitable applications.

Close up of a young man's fiberglass / Plaster leg cast and toes after a running injury

Fracture Support, Assessment & Ongoing Support

We ensure that our patients have a full understanding of what to consider while wearing a cast and for how long they may need to wear it. Timing may also depend on the referrer’s (i.e. surgeon) guidelines.

We request that we be notified straight away if there are any problems with the cast or if the patient notices any significant swelling.

In the rare instance that there’s a significant concern after hours and our staff is unavailable, we recommend visiting your nearest emergency department.

Ready to Work with Orthotics Plus?

Please note about our services:

  • We see a high number of fracture patients and have gained extensive experience in fracture management since 2012
  • Our team is experienced in applying casts to ensure the fracture site is immobilised in a corrective way
  • Our goal is to keep our patients as functional as possible while they’re on an appropriate path of recovery
  • We work with adult and paediatric patients, anyone is welcome to contact us

Please use our clinic locations or referrals pages to start with us.

Contact Us Call (03) 9077 6414

Orthotics Plus Heidelberg reception


Fibreglass casts are made of a mixture of fibreglass and other synthetic materials such as polymer.

Previously, such casts consisted almost entirely of fibreglass, making them quite harsh and uncomfortable, albeit functional.

The casting materials we use at Orthotics Plus are fibreglass, polymer and a undercast padding. So they are rigid, waterproof and relatively lightweight when compared to other casts.

Typically, no.

If your fracture is an emergency please treat it as such and visit your local ED. If your fracture has been diagnosed by a GP and they have referred you to a hospital or emergency department for a cast, you can request to attend Orthotics Plus or simply take that referral to our clinic.

We generally do not have wait times which is a major advantage of our service over an ED.

Depending on the patient’s condition, a splint may be recommended instead of a fibreglass cast.

Splints, which can be conditionally removed to shower, for example, can be a more comfortable alternative and provide similar support to a fibreglass cast.

Many people associate the use of splints with finger and toe fractures, however, splints can be used for a host of fractures, including finger, wrist/distal radius, scaphoid, elbow, ankle and knee fractures.

Our Orthotist will determine which option is best for you based on your condition.


Fibreglass itself is naturally waterproof and is used in many marine applications.

When considering the water resistance of the cast, it’s the padding underneath the fibreglass exterior that can be waterproof or non-waterproof. Either option may be used based on the patient’s individual circumstances.

If a patient has a wound, for example, a non-waterproof fibreglass cast would be the preferred option.

In most public hospitals, a mix of fibreglass and synthetic material may be applied, but waterproof padding isn’t typically available.

Orthotics Plus stocks both options and will discuss your needs, please browse our waterproof casts page to learn more.

We take pride in ensuring all fracture cases are booked in ASAP and we prioritise urgent referrals.

Our Orthotists are highly experienced and treat each patient with compassion and care.

When patients are wearing a cast for 4-10 weeks, it’s imperative to have a cast that fits well and is comfortable during the healing process, as such, the feedback we’ve received about our fracture management is that it’s an excellent investment as patients can sleep, move and return to normal without an uncomfortable and heavy cast.

Please phone us to confirm pricing and various funding schemes.