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Assembly and fitting advice for mitred corners on your Ecoease DIY Secondary Glazing

Before starting we recommend you read through the assembly and fitting advice for mitred corners in full. Leave the protection film on the panels until you are ready to fit them. It will protect the surface from accidental scratches.

Make up your Panels

Remove blue strip for ease of cutting

Firstly remove the steel tape from the back of the edging as it is easier to cut with scissors. This can be cut square – it doesn’t require mitring.

Cut the PVC edging strip (complete with magnetic tape) to fit your panels using a mitre block and hacksaw or chop saw. The outside dimension of the strip should be the ORIGINAL dimension that you gave us when you ordered (remember we reduced your panel sizes to allow for the thickness of the strip.)

Cutting the mitre for the corner

Next peel back the edges of the protective film on both sides of your PET sheet by approximately a couple of inches (5 cm.) Following this fit the pvc edging onto the panel ensuring that the corners meet well.

It can be useful to put a tiny drop of superglue onto the corners where they meet as mitres sometimes move.

Re-attach the steel tape, having cut it to the correct length. This sits on top of the magnetic tape on the back of your edging strips. Butt them up to each other for a continuous seal.

Image of degreasing frames Clean the surfaces around the window frame onto which you will be attaching the panel. Use methylated spirits or a similar degreaser.

Install your Panels

Slowly remove the protective film from the side of the sheet with the magnetic tapes. If you do it quickly it creates static and dust will fly to it. If you do create static and dust you can clean the surface using some furniture polish such as Pledge or similar. Use a SOFT damp cloth – microfibre is ideal. The polish will remove the static and the soft, non-abrasive cloth will get rid of the dust. Do NOT use the dry cloth on its own. NEVER use anything with an abrasive in it to clean your PET panels.

Remove the blue adhesive film backing from the steel tape. Under no circumstances put the white steel tape onto the window frame on its own. You will never match up the steel and magnetic tapes perfectly if you do this.

Next line up the panel against your window frame. An extra pair of hands can help now especially if the panes are large. When you are sure you have the panel exactly where you want it, apply light pressure to stick it to the surface of the frame. Now press around the edge applying as much pressure as possible. You can do this simply with your fingers. Or a narrow wallpaper border roller works well.

Finally remove the protective film from the inside surface of the sheet. Again we advise that you do this slowly to minimise any static electricity.



PET panels should be cleaned using either warm soapy water or a mild furniture polish (without alcohol.) This should be applied with a soft cloth such as microfibre. Never use anything abrasive to clean your panels and do not use a dry cloth.

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