Extra indoor layer
The film can help reduce draughts at suitable windows.
Thermal Window Insulation Film
Thermal Window Insulation Film
Regular price
£14.99 GBP
Regular price
£21.99 GBP
Sale price
£14.99 GBP
Taxes included.
Shipping calculated at checkout.
Quantity
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Full product specification
A clear indoor window insulation cover that adds an extra layer at a suitable window to help reduce draughts and improve winter comfort.
Window measuring & fitting guide
| Size | Choose the exact height and width in the size selector; check the selected price. |
|---|---|
| What to measure | Measure the full height and width of the area to be covered, including the frame and the flat surface needed for the fastening border. |
| Fixing surface | Check that the complete border has a suitable, clean and dry fixing surface. Extra wall space is usable only where it is flat and suitable for the fastening. |
| Cutting or resizing | Choose a finished cover that fits. Do not cut or alter the fastening border; this is not a cut-to-size glazing film. |
How the border fastens
Three checks before fitting
- Measure the full fitting area in both directions and compare with the selected cover. Check both measurements rather than glass size alone.
- Check the fixing surface and supplied fastening instructions. Test an inconspicuous area before applying adhesive to a decorated surface.
- Fit according to the supplied guide and keep essential ventilation and emergency escape routes accessible.
Can I buy a larger cover?
A larger cover may extend beyond the frame only if the whole fastening border can sit on a suitable surrounding surface. It cannot be made smaller by cutting the finished border. Send us your full fitting measurements for help.
Window covers do not replace damaged-window repairs, necessary ventilation or double glazing.
Results depend on your home, existing heating or glazing, fitting and use. No fixed energy-bill saving is guaranteed.
Delivery & sizing help
Free UK shipping. Delivery typically takes 5–10 working days after dispatch. Ask us about suitability before ordering, or read our delivery information and returns process.
WINDOW INSULATION
Choose a clearer route to winter comfort.
Add a transparent indoor layer to a suitable window. Select the exact size that matches your fitting area.
Check the details
Thermal Window Insulation Film
WHY THIS PRODUCT
Measure, choose, fit
Many size options
Select the height and width that match your measured fitting area.
Follow the guide
Use the supplied fitting method and keep ventilation clear.
CHECK BEFORE BUYING
Measure the whole fitting area.
Check both dimensions and the fixing surface before ordering.
- Measure height and width, including the frame and fixing allowance.
- Select the exact variant; sizes and prices vary.
- Do not block required ventilation or escape routes.
Can I use it instead of double glazing?
No. It is an additional indoor layer and does not replace glazing repairs or necessary ventilation.
Will it fit my window?
Compare your full fitting area, including the frame, with the selected size and installation instructions.
Will it reduce my energy bills?
It may help you use heat more effectively or reduce wasted warmth, depending on the product and your home. Results vary with your heating system, windows, installation and usage. No fixed saving is guaranteed.
Free UK deliveryTypically 5–10 working days from dispatchUK supportMon–Fri, 9am–5pm UK timeReturns informationRead your rights and our process