DIY Extra Window Insulation Using Bubble Wrap

Introduction: DIY Extra Window Insulation Using Bubble Wrap

 DIY extra window insulation using bubble wrap.

 This was inspired by an article on

 This is one method of a semi permanent fixing of bubble wrap to UPVC window units and my not be suitable for your style of window.

I have only done this on a frosted window as the reduction in visibility is not an issue.

Images show after & before.

Step 1: What You Will Need

A knife & sissers to trim the bubble wrap edges.
A scraper to prise out glass retaining strips & rubber weather strips.
A clean window.

Bubble wrap - not shown but it needs to be measured so that it is slightly larger than the glass with an inch or so to spare.

Step 2: Remove Internal Retaining Strips

First remove all the external rubber weather strips (prise them up with the scraper then pull them out gently).

Gently push the glass towards the outside, it will not fall out as the hole in the frame on the outside is smaller than the glass size (Check that you windows are like this before starting).
It only needs to move a bit to allow the removal of the internal retaining strips.

 Using the scraper push one of the side retaining strip forward so it snaps out of it groove (2 of the strips would have been fitted last need to come out first - they should be the ones with the 45 degree mitered ends.

Step 3: Fit the Bubblewrap

Once all 4 retaining strips have been removed place the bubble wrap bubble side down onto the glass, it will stick a bit if the window is damp.

Trim any excess so that it covers the whole sheet of glass.
If you have any large gaps between the glass and the frame fill them with excess bubble warp but be sure not to have it showing on the out side of the glass.

Step 4: Re Fiting Process

Refit the top retaining strip so it sits on the bubble wrap & fits in to its groove, you may need to push the window from the outside top half (but not too much) so the glass pushes it back & the strip sits in its original position, the scraper can also help to prise it back in if its a bit stiff.

 Then re fit the external rubber weather strip to the top starting in the middle & working your way to the edges but leave about 1/4 loose from each end, this will hold the glass & bubble wrap in place at the top of the frame but also allow the side strips to go in later.
Then smooth the bubble wrap down & refit the lower retaining strip just like you did for the top & re fit the weather strip again leaving 1/4 loose at each end.

 Next gently, using one of the side strips, comb the bubble wrap so it is smooth then snap it in just like the top & bottom ones, repeat this for the other side. once in place refit the external side rubber strips & finish off the top & bottom ones to secure the glass.

Step 5: Results

The window is no longer icy cold to the touch & the room seems to retain its heat a lot longer.

Its been in over the winter with a reduction in condensation.

The bubble wrap does reduce a small amount of light getting through.

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    6 Discussions


    5 years ago on Introduction

    This works and is especially appropriate for privacy.

    Bubble Wrap Insulation WORKS! There are easier and fancier ways to apply it, so do some searches before commencing. But no kidding, it really does save on energy consumption!


    9 years ago on Introduction

    I just posted a similar window, nice job.


    Reply 9 years ago on Introduction


    Your frame method looks easy to remove, I haven't cleaned my windows for ages..

    I would now recommend putting some silica Gel at the bottom as I have started to get slight condensation build up between the glass & wrap.

    Watch out for black mold, keep it under control with bleach.



    9 years ago on Introduction

    I love this! Do you know how this would hold up to a blower door test? Georgia now requires them and I have a company coming over to preform it, and I wonder if this would help my rating. These are the guys that are doing it if that helps: thanks!