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Acrylic Secondary Glazing
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How we process your order


How we process your order

Acrylic Secondary Glazing

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From £ £ £
From £ £ £
Secondary acrylic glazing provides an additional layer of glazing to your existing windows, helping reduce heat loss in your home while reducing sound levels. Fitting secondary glazing with magnetic adhesive tape is a simple DIY process.
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Optional extras

Round Corners

The radius for each corner.

Please note the orientation of your sheet matches this diagram when specifying rounded corners.

Drilled Holes

Choose the number and positions of the holes you require.

Select Hole Placement: {{product.holes.placement.length}} Holes selected
Weight per panel/sheet

~ {{weightPerPanel.toFixed(2)}}kg maximize maximize maximize

Tiered Discounts

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Bespoke Fabrication

We have the machinery and expertise to manufacture bespoke items in acrylic, polycarbonate and many other plastics, from one-offs to large production runs. Read more about the various services we offer, or complete the form below to request a quote.

CNC Routing

Our advanced Multicam Apex 3R (3 Axis) CNC routers allow us to provide an extensive range of precision CNC routing services. Read more

CNC Laser Cutting

Laser cutting is a fabrication process that uses a thin, intensely focused stream of light to cut through a range of different materials, including plastics and acrylics.  Read more

Diamond & Flame polishing

Edge polishing is a fabrication process that polishes the edges of acrylic panels, removes any cutting marks, and achieves a smooth, glossy finish.  Read more

Rotary & Laser Engraving

Laser engraving is a fabrication process that uses a laser beam to physically remove the surface of a material to create an indentation that is noticeable to both the eye and touch.  Read more

Line Bending

Line bending is a process that’s used to make precise folds in plastic and acrylic components. Our line bending fabrication service allows us to bend plastic and acrylic sheets along a defined ‘line’ – without any need for gluing or joining.  Read more

Have bespoke requirements?

Complete this form and we will get back to you with a quote.

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Unlike double glazing, which involves fitting completely new units (with all the associated expense and disruption), fitting secondary glazing is a fast and simple DIY process which helps to reduce heat loss in your home. You simply attach the acrylic panel to your existing windows or window frame using magnetic adhesive tape.

Key features

  • Excellent optical clarity
  • Strength
  • Light weight
  • Cost-effective
  • Excellent insulating material
  • DIY installation
  • Cut to size
  • Reduced sound levels
  • Shatterproof

Detailed description

High optical clarity

Acrylic sheet benefits from excellent optical clarity, it's as clear as glass so lets light through while keeping the cold out.


Once installed and supported by the magnetic tape, acrylic glazing panels can be easily removed and stored when not required.


Acrylic performs well as an insulating material, providing superior insulation to a sheet of glass of the same thickness, in addition to being cheaper and easier to install and maintain. The thermal conductitity of a material is measured by a property called the 'K value' which refers to the ability of a material to conduct heat. A low K-value is advantageous for insulating materials, as this means heat energy cannot easily pass through. Traditional single pane glass has an average K value of 0.96 whereas our Acrylic and Polycarbonate sheets have a K value between 0.19 and 0.21 which demonstrates why these materials provide superior insulation, in addition to being cheaper and easier to install and maintain.


Fitting secondary glazing is a fast and simple DIY process. You simply attach the acrylic panels to your existing windows or window frames using a magnetic adhesive tape kit. The kit, which must be purchased seperately (see Magnetic & Steel Tape) has two parts, a steel tape which is applied directly to your window or  window frame, and a magnetic tape which is applied to the clear acrylic panel. You can alternatively choose to have holes drilled in the panel, however you will need to ensure that a foam tape is also fitted to all edges of the panel to ensure there are no gaps that allow the heat to escape.

Please note: If you are fitting panels larger than 1.4m x 1m you must use the 19mm wide tape due to the panel being too heavy for the 12.7mm wide tape.

Sound reduction

In addition to reducing heat loss acrylic secondary glazing also reduces noise levels. Acrylic sheet offers sound loss characteristics comparable to glass.


Acrylic secondary glazing is ideal for all homes that have single glazing, period properties with sash windows, buildings where renovations are not possible, and schools, offices and large areas that are difficult to heat adequately during the colder months.

Cut to size

Ordering acrylic glazing panels is easy, simply measure up and order the exact sizes required ready for fitting. Ordering cut to size is not only convenient but reduces waste material keeping costs down.

Please note: This product does not include the magnetic tape which must be purchased seperately.



Country of Manufacture


Stock sheet sizes

2440mm x 1220mm

Minimum panel size

50mm x 50mm

Maximum panel size

2440mm x 1220mm

Relative density

1.19 g/cm³

Manufacturers thickness tolerance

+/- 5% (e.g. 3mm Extruded acrylic sheet could vary from 2.85mm to 3.15mm)

Cutting tolerance

+/- 1mm

Material protection

Protective film on both sides

Fire rating

UK class 4

Service temperature

-40°c to 80°c

Vicat softening temperature


Water absorption


Material Name / Scientific Name

Poly(methyl methacrylate) "PMMA"



Maximum recycled content


Light transmission


We currently deliver throughout the UK. Delivery charges are calculated based on the longest side of the material ordered. Only one delivery charge is applicable per order regardless of how many items are ordered.

UK Delivery costs

Longest side Orders under £150 Orders over £150 Express Delivery
Samples (100mm x 100mm) £2.95 FREE £9.95
Less than 500mm £5.95 FREE £12.95
500mm to 1499mm £9.95 FREE £19.95
1500mm or greater £14.95 FREE £24.95

Standard delivery for all accessories is £7.95, or £12.95 for Express delivery.

All prices listed include VAT.

European Delivery

We have temporarily disabled European delivery for orders placed through our website whilst we make changes to implement the correct rate of VAT being charged. Our team can however manually place zero-rated orders so please contact us if you require delivery to the European Union.

Delivery Times

We process and dispatch the vast majority of orders within 48 hours of receiving the order, however our guidelines for delivery times are listed below:

  • Standard delivery (3-5 working days)
  • Express delivery (2-3 working days)

Express Delivery

If you require faster delivery you may wish to consider choosing our Express Delivery option at the checkout. Express Delivery orders will be prioritised and will be delivered using a recognised nationwide courier.

Next Day Delivery

Next Day delivery is not available via our website due to the quantity and bespoke nature of orders we receive on a daily basis. However, if you need to place an order and require Next Day delivery please contact us – we will make every effort to meet your requirements and deadlines.

Remote Areas

Due to the nature of the ”made to measure” products we supply, we provide delivery prices at a standard rate and reserve the right to cancel an order should it become economically unviable to fulfil the order. In these rare circumstances the customer will be contacted first to discuss alternative options.

When delivering to some delivery locations we can incur increased shipping costs, if this is likely to happen the customer will be contacted to discuss any possible extra delivery charges required.

Examples of delivery locations which may require additional delivery charges are,

  • Channel Islands
  • Scottish Islands
  • Isle of Man
  • Isles of Scilly
  • Remote areas
  • Northern Ireland

If you require delivery to one of these areas please get in touch to discuss your order.

Can I collect my order from Simply Plastics?

Yes, of course. Orders can be collected from our premises in Colchester, Essex. At the final stage of the checkout process there is a delivery option labelled "Collection/pickup" which is free. Once your order is complete, you will be notified by email along with our address and collection times.

I need my order urgently, can I pay for faster shipping?

Yes. We offer an express delivery service which aims to deliver all orders in 1-3 working days. Orders are delivered by a recognised courier company and may require a signature on delivery.

Rated 5/5 from 16 reviews

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The window panels have been cut to the specified sizes, delivery was prompt and an error (missing window panel from package) was resolved quickly and easily with the delivery of the missing panel within a couple of days. Currently installing windows (in summer), so do not know yet how they will perform under winter conditions. NB it would have been helpful to have a guide for DIY installation and to have known how useful the cardboard packaging is as a base for laying panels on when applying the tape - in order to reduce static, which attracts dust and dirt - and as a wrapping to protect windows when stored in summer

Reviewed by alice on 19 Aug, 2023 Read all
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