How to Install Bubble Wrap on Windows (No Tape Needed — Takes 5 Minutes)

The first time I did this, it took me about two hours.

I kept cutting the bubble wrap too small. Then too big. I wasn't sure which side to put facing the glass. I tried to use tape to stick the edges down, which made a mess. By the end I had something that worked but looked like a science project gone wrong.

The second time? Five minutes. Same result, no mess.

Here's everything I wish I'd known before starting.

What You Need

• Bubble wrap — recycled from packaging, or bought fresh (see our guide to choosing the best type →)
• A spray bottle filled with plain water
• Scissors or a box cutter
• That's it

No tape. No adhesive. No double-sided mounting strips. No special tools. The water alone creates a firm, temporary bond between the bubble wrap and the glass that holds for months.

When you're ready to take it down in spring, peel from one corner — it comes off cleanly without leaving marks or sticky residue.

Bubbles In or Out? Which Side Faces the Glass?

This is the question everyone asks, and the answer matters.

Bubbles face the glass. Always.

Here's why: the bubbles need to contact the wet glass surface to create the adhesive bond. If you put the flat side against the glass, the water can't grip the textured surface properly and the bubble wrap will fall off — or never stick in the first place.

There's also a thermal argument for bubbles-in: the air pockets are directly against the glass surface, creating the insulating layer right where the cold is. The flat exterior surface gives you a slightly smoother look from outside (not that it matters much).

Not sure which size bubble wrap to use? The bubble wrap size guide → covers small vs large bubbles in detail — bigger is better for insulation.

Step-by-Step Installation

Step 1: Measure your window

Measure the glass pane itself — not the whole window frame, just the glass. You want the bubble wrap to cover the glass only, not overlap onto the frame. This makes it look tidier and means you don't have to deal with the bubble wrap fighting with the window edges when you open it.

For large windows, work in panels if you need to. Two overlapping pieces work fine — just make sure they overlap by a few centimetres so there's no cold stripe between them.

Step 2: Cut the bubble wrap

Cut your bubble wrap slightly smaller than the glass pane — maybe 5mm smaller on each edge. This gives you a clean fit without bubbles getting squeezed into the frame.

Use long, straight cuts with scissors. Or lay the bubble wrap on a flat surface and cut with a box cutter against a straight edge. Don't worry about absolute perfection — a small gap at the edges is fine and doesn't significantly reduce the insulation effect.

Step 3: Spray the glass

Fill your spray bottle with plain water — no soap, no cleaning products, just water.

Spray an even, light film across the entire glass pane. You're not trying to soak it, just create a thin, uniform damp surface. Think of the kind of fog that appears on a bathroom mirror — that's about the right amount of moisture.

If you spray too much water, it runs down the glass in rivulets and the bubble wrap won't stick well. Too little, and the bond is weak and edges will lift. The sweet spot is a lightly misted surface.

Step 4: Apply the bubble wrap

Pick up your cut piece of bubble wrap with the bubbly side facing towards you.

Press it firmly against the wet glass, bubbly side going onto the glass. Start from one edge and smooth it across so you push any air bubbles outward rather than trapping them in the middle.

Press firmly all over — especially around the edges — until you can see the bubble wrap is holding uniformly against the glass.

Step 5: Check and adjust

Step back and look at it from a distance. If any corners are lifting, spray a little more water behind them and press again. If there's a section that won't stick, a small piece of clear tape at the very corner will hold it without being noticeable.

Let it sit for a few minutes. As the water dries slightly and the plastic conforms to the glass, the bond firms up.

That's genuinely it. Five steps, one spray bottle, no tools, no mess.

Tips That Make a Difference

• Use larger bubbles where possible. Larger air pockets = slightly better insulation. If you have a choice of bubble wrap sizes, use the one with the biggest bubbles for windows. More on this in the bubble wrap size guide →
• Work on a dry, cool day. On very hot days, the water evaporates too quickly before the bubble wrap can bond. Early morning works well.
• Do north-facing windows first. These receive no direct sunlight and lose the most heat in winter. They're also where the fuzzy view bothers you least.
• Work from inside the house. You're installing from the interior side of the glass, not outside.
• Label your pieces. If you're doing multiple windows, roll each piece loosely, write the window location on a sticky note attached to it, and store them somewhere dry. Next winter, installation really does take 5 minutes because you've already done the cutting.

Dealing With Odd-Shaped Windows

Arched windows, porthole windows, and other non-rectangular panes require a bit more effort. The trick is to make a paper template first — newspaper works well. Cut the template to fit the glass, then use it to trace and cut your bubble wrap to the right shape. The installation process is the same once you have the right shape cut.

How Long Does It Last?

One season, typically — sometimes two if you're careful when removing and storing it. The material itself lasts longer than one winter, but it gradually gets a bit crumpled and the bond weakens after repeated application and removal.

If a piece is still looking clean and flat after being stored through summer, it's fine to reuse. If it's crumpled and won't lie flat against the glass anymore, recycle it.

Wondering how much heat you're actually saving? Check the bubble wrap effectiveness guide → for R-value data and annual energy saving calculations.

How to Remove It

Peel from one corner. It comes away cleanly. No residue on the glass, no scraping required.

If any small water marks are left on the glass, they wipe off in seconds with a dry cloth.

Roll the removed bubble wrap loosely (don't fold it flat — that damages the bubbles), store in a cool dry place, and it'll be ready for next winter.

Also works the same way in summer — for more on that see bubble wrap on windows in summer → where we cover how to use it for cooling instead of heating.

This article is part of the complete bubble wrap window insulation guide → Browse the full series: Does it work? · Best bubble size · Summer use · Effectiveness data · vs plastic film · Best types to buy

Frequently Asked Questions

Which side of bubble wrap faces the glass?

The bubbly side always faces the glass. The bubbles grip the wet glass surface to create the adhesive bond. Installing with the flat side against the glass results in poor adhesion and the bubble wrap falling off.

Do you need tape to stick bubble wrap to windows?

No tape is needed. A thin film of water sprayed onto the glass creates sufficient surface tension to hold the bubble wrap firmly for an entire heating season. The bond actually strengthens slightly as the water dries and the plastic conforms to the glass.

How long does bubble wrap stay on windows?

With a proper water installation, bubble wrap stays on windows for the entire heating season — typically 4 to 6 months — without falling off. The same pieces can be stored and reused for 1 to 3 seasons.