luxury yacht windows surrounding a boat galley

So people often ask us “what are boat windows made of?” Well there is no single answer, as boat windows, also known as marine windows or portholes, are typically made of different materials that are each resistant to the harsh marine environment. The choice of material depends on various factors such as cost, durability, visibility, and specific application requirements. Here are some common materials used for boat windows:

  1. Acrylic (Polymethyl Methacrylate or PMMA) Boat Windows: Acrylic is a lightweight and impact-resistant plastic material that is commonly used for boat windows. It offers excellent clarity and is less prone to shattering compared to glass. Acrylic windows can be manufactured in various shapes and sizes, making them versatile for different boat designs.
  2. Polycarbonate Boat Windows: Polycarbonate is another type of plastic material used for boat windows. It’s highly impact-resistant, making it suitable for applications where increased durability is required. Polycarbonate windows can withstand heavy impacts without shattering, but they may scratch more easily than glass or acrylic.
  3. Tempered Glass Boat Windows: Tempered glass is a popular choice for boat windows due to its strength and clarity. It’s made by heating regular glass and then rapidly cooling it, resulting in increased strength and resistance to breakage. Tempered glass is relatively scratch-resistant but can still shatter under extreme impact. Unfortunately due to the high costs of moulding and fabricating glass it not most peoples choice material.
  4. Laminated Glass Boat Windows: Laminated glass consists of two or more layers of glass with a layer of transparent plastic (typically polyvinyl butyral or PVB) in between. This construction enhances the strength and safety of the glass by preventing it from shattering upon impact. Laminated glass is commonly used in larger boats or flatter apertures that require little fabrication. As Many people tend to avoid using glass as a material for boat windows due to its expensive molding and fabrication processes, which can be cost-prohibitive.

The specific choice of window material depends on factors such as the boat’s size, purpose, budget, and personal preferences. It’s also worth noting that advancements in materials and technology may introduce new options or variations in boat window materials in the future.

Looking for something greener?

We’re always striving to use better materials for the environment and can highly recommend Perspex ®  Re Cast Acrylic is 100% recyclable
PMMA,  an almost unique polymer in that end of life (or waste products) can readily be recovered to the original raw material – MMA monomer and re-used in new sheet.

If you would like to talk about a project involving Cast Acrylic or boat windows, please contact us on 02392486633 or email us on

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