How to Keep Sandwich Board Inserts From Buckling, Fading, or Slipping

Sandwich board inserts are a popular and effective way to capture attention outside shops, at events, or along busy streets. However, if the inserts buckle, fade, or slip inside the frame, your message is lost and your business does not look professional. The good news is that you can prevent these issues with the right choices for size, material, and installation. This guide explains how to keep sandwich board inserts looking sharp, plus practical ordering tips for custom printed signs from Legit Fast Printing.

What Are Sandwich Board Inserts?

Sandwich board inserts are rigid panels that fit into A-frame (sandwich board) sign holders. They are often used outdoors to promote store specials, parking instructions, or event details. The most common size for sandwich board inserts is 24 x 36 inches. Legit Fast Printing offers custom-printed coroplast inserts designed specifically to fit standard A-frame sign holders.

Direct Solutions to Prevent Buckling, Fading, and Slipping

To keep your custom sandwich board inserts professional and effective:

• Use the correct insert thickness and material. Corrugated plastic (coroplast) at 4mm thickness resists weather and holds its shape outdoors.
• Order the size to fit your A-frame holder precisely. Standard boards use 24x36 inch inserts. Measuring before ordering is key.
• Choose professional UV-resistant printing so your message stays bright instead of fading in sunlight.
• Install and store inserts properly to avoid warping or accidental slipping.
• Keep backup inserts on hand in case of wear or damage.

Following these steps ensures your message will stay visible and your sign will last.

Choosing the Best Insert Material and Thickness

The material and thickness of the insert make the biggest difference in preventing buckling and fading. Most businesses and event organizers choose coroplast for a balance of weight, strength, and weather resistance.

• Coroplast (corrugated plastic) is waterproof and stands up to sun, rain, and humidity. It’s also cost-effective for high-traffic locations.
• 4mm thick coroplast is the standard for durability. Thinner materials can flex, buckle, or be pushed out of the frame by wind.
• Cardboard and foam board are not recommended for outdoor use. They absorb moisture and warp, especially after rain.

Legit Fast Printing uses premium 4mm rigid coroplast for our Custom 24x36" A Frame Insert for Sandwich Board Signs, making them ideal for long-term outdoor sidewalk advertising.

How to Keep Inserts Flat: Sizing and Frame Fit

Correct sizing and a good fit can prevent buckling and slipping:

• Measure your A-frame’s insert space (visible area) before ordering. Most are 24 x 36 inches but always check.
• Do not trim inserts larger than needed. A tiny bit of clearance (about 1/16 inch on each side) gives room for the panel to expand and contract with temperature changes.
• Insert panels all the way to the bottom stop. If your frame has top or side channels, make sure inserts are slid in all the way.

Frames with loose or worn retention tabs can let inserts slip or tilt. Use clear tape tabs or a narrow shim of coroplast if you need the insert held tighter, but check the frame can still close properly.

Preventing Buckling (Warps and Waves)

Buckling usually comes from heat, moisture, or poor storage. Simple habits can stop these issues:

• Avoid dark-colored frames in direct sun, as they get hotter and may cause the plastic insert to flex.
• Never use bare cardboard backing for outdoor panels. If you use a backing layer, choose waterproof options like extra coroplast or PVC board.
• Keep water from collecting inside the A-frame by draining rain after storms.
• Store inserts flat (on a table, not leaning against a wall) and away from heat when not in use.

If an insert buckles, remove it and store flat under a light, even weight. Some minor warping may flatten out. Permanent bends usually mean it’s time to replace your panel.

Protecting Colors From Fading

Sun can quickly fade printed signage, but using the right processes from the start helps maintain clear, visible messages:

• Order UV-resistant prints from a sign professional. Legit Fast Printing uses outdoor-grade inks for every sandwich board insert.
• High contrast colors (such as black or blue on white) stay readable longer than pale pastel shades.
• On bright days, try to rotate your board or bring it inside after hours. This slows fading for messaging you want to last the season.
• Clean gently using only mild soap, water, and a soft cloth—never harsh chemicals or rough scrubbers. These can make signs look dull even if they aren’t faded by the sun.

Preventing Inserts From Slipping or Blowing Out

Inserts sometimes slip or tilt inside the A-frame, especially if the sign holder is bumped or handled roughly. Here are simple fixes:

• Check the insert is the right size for your board. Too narrow or short panels will slide down or rattle.
• Use retention tabs, internal clips, or a strip of clear, thin tape inside the frame channel if needed.
• For breezy locations, make sure your A-frame is weighted according to manufacturer instructions. Add a sandbag or use built-in ballast wells if provided.
• A foam spacer or Velcro square behind the insert can help prevent movement in older frames.

Installation Tips

• Inspect your A-frame before each install—no cracked or protruding parts inside the channel.
• Hold inserts at the edges and slide smoothly to avoid flexing or scraping the print.
• Do not force inserts into place. If you feel resistance, check for obstructions and try again.

How Many Inserts Do You Need?

We recommend ordering extra inserts for easy swaps, seasonal promotions, or damage. A practical approach for most storefronts is:

• Two matching inserts for daily use (one for each side of your sandwich board)
• Two backup inserts for quick replacements or alternate sales messages
• Multi-location businesses often order multi-packs (such as 6 or 10) for multiple stores or departments

This way, you never have to wait if a sign gets damaged or if you want to quickly change messages for a new sale or event. Legit Fast Printing offers single, two-pack, four-pack, six-pack, and ten-pack quantities on sandwich board inserts.

Best Practices for Custom Yard Signs and Sandwich Board Inserts

• Choose a trusted print partner like Legit Fast Printing for professional results.
• Always measure your board frame before ordering, especially if using older or non-standard displays.
• Stick with sturdy 4mm coroplast for outdoor use—it lasts far longer than basic poster board or cardboard.
• Use legible fonts and strong colors for high visibility, just like with custom yard signs.
• Read our related guide on sandwich board insert materials for rain, sun, and daily sidewalk use to dive deeper into material selection and weatherproofing.

When to Replace Your Sandwich Board Inserts

No sign material lasts forever when used outdoors every day. Watch for these signs that it’s time to reorder:

• Fading or discoloration compared to your branding
• Permanent warping or buckling that will not straighten out
• Corners or edges that are bent, chipped, or cracked

For high-traffic sidewalk A-frames in sun-prone locations, most businesses freshen their inserts every 6 to 12 months. For part-time or sheltered use, your signs may last up to 24 months before needing updates.

Frequently Asked Questions (FAQ) About Sandwich Board Inserts

Summary and Next Steps

Keeping sandwich board inserts from buckling, fading, or slipping is all about making a smart choice in material, sizing, and care. Coroplast inserts at 4mm thickness, sized to fit your frame, are the most practical solution. Install carefully and store flat for the longest life. For backup inserts or new campaign messages, always have extras ready so you do not miss out on sidewalk traffic.

When you are ready to order customized A-frame inserts or want advice on the best signs for your storefront or event, our team at Legit Fast Printing is here to help. We specialize in durable custom yard signs and printed signage so your message gets seen.