Installing your own secondary glazing in a few simple steps (DIY)

Step 1: Remove protective film

Provide a dust-free clean area so that no dirt can get between your window and the secondary glazing. Remove the protective film on one side of the secondary glazing, and clean the edges with an anti-static cloth.

Step 2: Apply insulation tape

Stick the insulation tape along the edges of the secondary glazing. The insulation tape is self-adhesive when you unroll it. The insulation tape sticks instantly, and once it is stuck it is very difficult to remove. By laying a wooden slat along the edge, you make sure the insulation tape is straight. Make sure you fix the slat with clamps while sticking. Make sure the insulation tape fits tightly at the corners to avoid drafts, and cut it off after sticking. Now press down the insulation tape firmly.

Step 3: Ventilation

Note that old frames can become damp on the inside. If this is the case with you, leave part of the insulation tape open to allow the secondary glazing to ventilate. Leave two 2-cm pieces at the bottom of the secondary glazing open, one at the bottom left and one at the bottom right.

Step 4: Marking out secondary glazing

Mark out the position of the secondary glazing in several places around the opening of the frame. These will be at a distance of 2 cm from the edge of the window frame. Draw two lines on the left and right at the top of the window frame. Draw a line near the top on both sides, to enable you to position the secondary glazing straight. Again, draw these at 2 cm distance from the opening of the frame.

Step 5: Positioning the secondary glazing

Take your supplied secondary glazing and apply duct tape to the top. Use this to tape the secondary glazing in the marked position. Temporarily tape the secondary glazing to your frame. On the underside, apply an extra piece of tape to fully fix the sheet in position. Press the duct tape well.

Step 6: Marking out glazing clips

Now we are going to mark the fixing points of the glazing clips on the frame. The glazing clips will later be screwed at a distance of 0.6 cm from the edge of the secondary glazing. Mark them out 5 cm from each corner. Then distribute the remaining glazing clips evenly between these points on all sides. Space the intermediate glazing clips a maximum of 30 to 40 cm apart.

Step 7: Screwing glazing clips in place

Remove the protective film from the glazing clip parts. Assemble the parts by inserting the screw through them. Place the glazing clip in the right place with the spacer against the edge of the secondary glazing so that it is clamped in. Screw down the glazing clips using a screwdriver with Phillips bit. Start by screwing the lower glazing clips in place. Make sure not to overtighten the screw. The glazing clip should still be able to rotate.

Step 8: Finishing off

Remove the duct tape and then remove the secondary glazing from the glazing clips. Now remove the protective film and clean the sheet with an antistatic cleaner and a soft cloth. If you don’t have an antistatic cleaner, all-purpose cleaner is also good. Never use glassex on your sheet. This can make the sheet dull. Clamp the secondary glazing back into place with the glazing clips. Your secondary glazing is now finished.

The results

Step 1: Holes

We recommend ordering secondary glazing with pre-drilled holes. You can add these drill holes via our webshop when ordering your secondary glazing.

• Make sure the holes are 0.8 cm in diameter.
• The centre of the holes must be at a distance of 1.2 cm from the edges.
• The first holes on each side are located 5 cm from each corner.
• The other holes should then be separated by a maximum of 30 to 40 cm.

We have configured a model secondary glazing with holes which you can customise to your own dimensions. You can also choose to drill the holes yourself. You can use the instructions for acrylic drilling to do so. Choose cast acrylic if you intend to drill the holes yourself.

Step 2: Remove protective film

Provide a dust-free clean area so that no dirt can get between your window and the secondary glazing. Remove the protective film on one side of the secondary glazing, and clean the edges with the anti-static cloth.

Step 3: Apply insulation tape

Stick the insulation tape along the edges of the secondary glazing. The insulation tape is self-adhesive when you unroll it. The insulation tape sticks instantly, and once it is stuck it is very difficult to remove. By laying a wooden slat along the edge, you make sure the insulation tape is straight. Make sure you fix the slat with clamps while sticking. Make sure the insulation tape fits tightly at the corners to avoid drafts, and cut it off after sticking. Now press down the insulation tape firmly.

Step 4: Ventilation

Note that old frames can become damp on the inside. If this is the case with you, leave part of the insulation tape open to allow the secondary glazing to ventilate. Leave two 2-cm pieces at the bottom of the secondary glazing open, one at the bottom left and one at the bottom right.

Step 5: Marking out the secondary glazing

Mark out the position of the secondary glazing in several places around the opening of the frame. These will be at a distance of 2 cm from the edge of the window frame. Draw two lines on the left and right at the top of the window frame. Draw a line near the top on both sides, to enable you to position the secondary glazing straight. Again, draw these at 2 cm distance from the opening of the frame.

Step 6: Taping the secondary glazing

Take your supplied secondary glazing and apply duct tape for temporary fixing. Stick the duct tape at the top first. Position the secondary glazing along the drawn lines. Then temporarily tape the secondary glazing to your frame. Stick an extra piece of tape on the underside to fully fix the secondary glazing in position. Press the duct tape down firmly.

Step 7: Pre-drilling holes

With a 3 mm wood drill bit, now mark the positions to pre-drill later. Before marking, run the drill briefly through all the holes. Make sure you mark the positions in the middle of the pre-drilled holes. Loosen the duct tape and remove the secondary glazing to fully pre-drill the holes.

Drill the holes about 4 cm deep. When all holes have been pre-drilled, clean the window with anti-static cloth and anti-static cleaner and replace it using the duct tape.

Step 8: Screwing secondary glazing in place

Combine the screws with a washer. Use a torx bit to screw the screws into the pre-drilled holes. To do this, locally remove all the protective film at the positions of the drill holes to allow space for the screw head. Screw the secondary glazing in place. Do this by running the drill at low speed. Do not screw in the screws too tightly, to avoid putting too much tension on the secondary glazing.

Step 9: Finishing off

Remove the duct tape and protective film. Clean the sheet, preferably with antistatic cleaner and cloth. If you do not have an antistatic cleaner, all-purpose cleaner is also possible. Never use glassex on your sheet. This can make the sheet dull.

The Result