Magnetic DIY Secondary Glazing Kits

Standard & Extreme

Buy DIY secondary glazing kits online with The Plastic People, for both temporary and permanent solutions. Secondary glazing (sometimes called secondary windows) is a cheaper double-glazing alternative that is easy to fit!

Download our new DIY Secondary Glazing PDF guides including Measuring Guide (Standard), Measuring Guide (Extreme) & Secondary Glazing Installation Guide for an insight into how to measure and install your secondary glazing for the best results.

Magnetic Secondary Glazing is ideal for:

  • All homeowners.
  • Tenants in any rented property.
  • Holiday cottage rental (owners).
  • Period or listed properties (National Trust).

DIY Secondary Glazing - Cut to Size

We provide cost-effective, cut-to-your size clear as glass acrylic glazing (which looks just like a glass counterpart but is around 10 x stronger). Along with your plastic glazing sheets will be magnetic strips to secure your acrylic pane onto your existing window.

What does secondary glazing do?

Installing secondary glazing will provide you with energy insulation and draught proofing to your windows. It saves you money in that it is a cheaper solution to double glazing. It provides a good option if you cannot replace existing windows due to living in period or listed property.

Do It Yourself Secondary Glazing Products

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Secondary Glazing

DIY Secondary Glazing Kits

Our DIY secondary glazing system consists of a clear acrylic panel (cut to size) from your dimensions and self-adhesive magnetic tape (which you need to add) once you establish your window perimeter. Refer to our user guides below on this page for measuring, fitting and to get the best results.

Guides for Measuring and Fitting your DIY Secondary Glazing

Download our new Secondary Glazing PDF guides including Measuring Guide (Standard), Measuring Guide (Extreme) & Secondary Glazing Installation Guide for an insight into how to measure and install your Secondary Glazing kit for the best results. Secondary glazing should always be fitted on the interior side of your window.

Measuring for DIY secondary glazing:

  • Measure the length and width of the glass window pane that you want to secondary glaze. Measure the visible glass then add at least 55mm to the length and width measurements. This allows for space to attach the magnetic tape to your window frame.
  • Enter the measurements for each window into our tool above. The tool will automatically include the correct about of magnetic tape as well.

About our Clear Acrylic Panels

We supply clear as glass acrylic for secondary glazing because it is lighter yet much stronger (17x) than glass and provides near perfect optical clarity.

Guide to Magnetic Glazing Tape

For perimeters over 5000mm we recommend additional support as magnetic tape alone will not be enough to support the panel which could potentially detach and break. The magnetic tape comes in a pack containing 10m of white steel tape to attach to your window frame and 10m of magnet tape (with a white backing) to attach to your acrylic panel. You can also enhance your DIY secondary glazing installation with a finishing trim in either white or brown.

What Is Secondary Glazing?

Secondary glazing provides an additional layer over your windows. This essentially forms a double glazed solution for your windows, which can reduce drafts, improve heat retention, and reduce condensation. Compared to glass, plastic secondary glazing is much more cost-effective and can be easily cut into any size or shape.

Secondary glazing is especially useful on buildings where the original windows cannot be replaced (such as in listed buildings or rental properties) as secondary glazing installation won’t damage existing structures. It can also be used when the cost of replacing windows is too expensive or slow, as it is both cheaper, faster, and more convenient than a traditional window replacement.

How To Install DIY Secondary Glazing

Our simple DIY secondary glazing is straightforward to fit:

  • Begin by cutting and sticking the black part of the magnetic tape to the edges of the acrylic window pane. The steel and magnetic tapes both come in coils, so just measure off the length needed, cut and stick down into position.
  • Hold the acrylic window pane up to your window so that it overlaps your window frame equally on each edge.
  • Using a pencil, draw around the acrylic window pane onto your frame. Now cut and stick the white metal strip of the magnetic tape to your window frame - stick it just inside the pencil marks.
  • Finally, lift your acrylic glazing pane to the window and click into place.
  • Always fit your secondary glazing to your main window frame, not to the opening part of the window.

Important Considerations

  • Please check your existing window frame to see that you have at least 55mm of mounting surface available all the way round.
  • We do not recommend magnetic plastic secondary glazing for sloping windows or ceiling/roof windows.
  • • During the warmer months you may want to take down your panels. When doing so check your installation tape around your windows and store your panels flat to avoid warping until when you want to re-install.
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