Why Does My Fly Screen Keep Blowing Off in Windy Conditions?

A fly screen blowing off in wind is almost always a fixing problem. The screen has lost its grip on the frame or recess, and wind pressure takes care of the rest. It happens through general wear, UV degradation of rubber or plastic components, or poor fitting from the start. You can sort it yourself.

What You’ll Need

Tools

• Flathead screwdriver or plastic pry tool
• Tape measure
• Damp cloth or soft brush

Materials / Replacement Parts

• Replacement tension pegs or friction pins (match to your screen brand and size)
• Replacement magnetic strip or magnetic tape (for magnetic-fit screens)
• Replacement corner clips or retaining brackets (for framed screens)
• Double-sided weatherstrip tape (optional, for extra grip on push-fit screens)
• Replacement screen panel (if the mesh has stretched or distorted)

How to Fix It: Step-by-Step

Step 1: Work Out What’s Failed

Before ordering anything, find the actual failure point. Different screen types give up in different ways.

• Remove the screen and lay it flat. Look along the edges for broken, flattened, or missing tension pegs
• On magnetic screens, run a hand along the strip. Weak sections or areas that have lifted away from the frame mean the magnet has gone
• On framed screens, check every corner clip and mid-point fixing for cracks or missing parts
• Look at the recess itself. Timber moves over time, and if the opening has shifted even slightly, the screen may no longer sit snug enough to resist wind

Step 2: Clean the Recess

A dirty recess is an underrated cause of blow-offs. Grit and debris stop the screen seating properly, creating small gaps that wind gets into.

• Wipe down the inside of the recess with a damp cloth, paying attention to the corners
• Remove any old adhesive residue left by previous magnetic strips or tape
• Check the screen frame for bent edges. A slightly bent aluminium frame can usually be straightened by hand or with a soft mallet
• Let everything dry before refitting

Step 3: Replace the Worn Fixings

Match your replacement parts to your screen type. Using the wrong parts is why screens blow off again two weeks after repair.

• Tension peg screens: pull out the old pegs and press new ones into the pre-drilled holes along the frame edge. They should click in firmly and spring back when compressed
• Magnetic screens: peel off the old strip and apply new magnetic tape along the full perimeter. Press firmly for 30 seconds per section. Fold corners neatly rather than cutting close to the edge
• Clip-fit or bracket screens: unscrew old clips and fit replacements in the same positions. If the screw holes have stripped, move the clip 10-15mm and use a fresh fixing point
• If your location gets persistent strong wind, add a secondary fixing at the mid-point of each long edge

Step 4: Refit and Test It Properly

A loose refit is how screens end up on the floor again a week later. Take an extra minute here.

• Press the screen firmly into the recess. Start at the top corners and work down
• On tension peg screens, compress each peg fully before releasing. You should feel it grip
• On magnetic screens, run a palm along every edge to confirm full contact with no lifted sections
• Open a window or door nearby to create some airflow, then check the screen holds without bowing or lifting at any point
• If it still moves at a specific spot, add a short strip of weatherstrip foam tape behind that section of frame for extra friction