When you invest in a high-quality mattress like the Plank Firm by Brooklyn Bedding, you want it to last for years—and keep your warranty intact. But many people unknowingly make small mistakes that can void their coverage, leaving them without protection if an issue arises.

In this review, we’ll walk you through the essential steps to ensure your mattress stays in top condition while remaining under warranty. From proper support and cleaning tips to common pitfalls that could jeopardize your coverage, we’ll help you avoid costly mistakes. 

Whether you’re a new owner or considering the Plank Firm mattress, understanding these details can save you stress and money in the long run. A little effort in care and maintenance goes a long way in protecting both your sleep quality and your investment. Let’s dive in and make sure your mattress stays firm, comfortable, and covered for years to come.

Key Takeaways

  • The Plank Firm mattress comes with a lifetime warranty covering defects like foam splitting and sagging over 1.5 inches.
  • Using a proper foundation, such as a slatted base with slats no more than 4 inches apart, is essential to maintain warranty coverage.
  • Keeping the mattress clean and free from stains is crucial, as any moisture saturation can void the warranty.
  • Regularly rotating the mattress every three to six months helps prevent uneven wear and extends its lifespan.
  • Avoid placing the mattress directly on the floor or using an old box spring to ensure proper support and maintain warranty validity.
Plank Firm
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Mattress Advisory

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Mattress Reviews

POSTED ON

February 27, 2025

Understand What the Warranty Covers

The Plank Firm mattress comes with a lifetime warranty, which begins on the date of purchase and cannot be transferred. This means the warranty is only valid for the original purchaser. Here’s what it covers:

  • Defects in the foam structure, such as splitting or cracking.
  • Sagging of more than 1.5 inches, provided the mattress has proper support.
  • Material breakdowns despite normal use.

To benefit from these protections, you must follow Brooklyn Bedding’s care guidelines carefully.

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Plank Firm

A flippable all-foam mattress featuring high-density foam layers for superior support and comfort.
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Plank Firm

A flippable all-foam mattress featuring high-density foam layers for superior support and comfort.
Check Price

Use the Proper Foundation

To keep your Plank Firm mattress warranty valid, using the right foundation is crucial. Many people don’t realize that an improper base can void their coverage, leaving them unprotected if an issue arises. Here’s what you need to know:

  •  Use a slatted foundation with slats no more than 4 inches apart.
  • A solid wood or metal platform bed works well.
  • Adjustable bases are allowed and won’t impact your warranty.
  • Avoid using an old or weak box spring, especially if it’s over five years old.
  • Never place your mattress directly on the floor or an unsupported surface.

If you ever need to file a warranty claim, Brooklyn Bedding may request proof of your foundation setup. To be safe, document your bed frame and support system when setting up your mattress. Taking these simple steps can help protect your investment and ensure years of comfortable sleep

 Keep Your Mattress Clean and Stain-Free

Keeping your Plank Firm mattress’ safety in mind means protecting it from stains and spills, which can void your warranty. Even a small mark—whether from sweat, a spill, or everyday use—can make you ineligible for coverage. To keep your mattress in top condition, follow these simple steps:

  •  Use a waterproof mattress protector from day one to shield against spills and accidents.
  • Avoid eating or drinking in bed to reduce the risk of stains.
  •  If a spill does happen, clean it immediately with a mild fabric cleaner and gentle spot treatment.

One of the most important things to remember is that if your mattress becomes moisture-saturated, the warranty is automatically voided. Keeping liquids away is essential for maintaining both its longevity and warranty coverage. By taking these precautions, you’ll protect your investment and ensure your mattress stays clean, comfortable, and covered for years to come.

Rotate the Mattress Regularly

Understanding what to expect in a trial period is important when purchasing a new mattress, but proper maintenance is just as crucial for longevity. While the Plank Firm mattress isn’t flippable, regular rotation helps prevent uneven wear and extends its lifespan.

Brooklyn Bedding does not cover normal body impressions less than 1.5 inches, so taking preventative steps is essential. To keep your mattress in the best shape, rotate it 180 degrees every three to six months. This simple step ensures even weight distribution, reducing the chances of premature sagging. 

Additionally, always place your mattress on a stable, even surface—uneven foundations can lead to dips and void your warranty. Avoid frames with poor support, as they can contribute to long-term wear. By following these guidelines, you’ll not only maintain warranty coverage but also enjoy a firm, supportive sleep surface for years to come. A little upkeep goes a long way!

Never Leave Your Mattress Compressed for Too Long

When purchasing a mattress online, it’s important to understand the unboxing process and potential risks. Based on user complaints and real experiences, leaving the Plank Firm mattress compressed for too long can cause permanent damage, which is not covered under warranty. 

While it arrives conveniently in a box, it should be unboxed within 30 days to ensure proper expansion and performance. Waiting longer—especially beyond 60 days—can lead to foam deterioration, affecting comfort and durability.  Once unboxed, allow the mattress to fully expand before sleeping on it to ensure it reaches its intended firmness and support.

If you need to store it temporarily, avoid keeping it in its compressed state, as this can damage the internal materials. Neglecting these steps may result in long-term issues, voiding your warranty and reducing the lifespan of your investment. Properly handling your mattress from day one ensures a comfortable and supportive sleep experience for years to come.

Plank Firm

Credits: Plank

Do Not Use the Mattress Handles for Lifting

Many people assume that the side handles on the Plank Firm mattress are meant for lifting, but they’re actually decorative and not designed to support the mattress’s full weight. Using them to carry, move, or adjust your mattress can lead to damage, which is not covered under warranty. To safely move your mattress, always lift it from the bottom with the help of another person. Placing it on a flat, stable surface before moving ensures you don’t strain the foam or cause unnecessary stress to the materials. Avoid dragging or folding the mattress, as this can compromise its structure and reduce its longevity.

Mishandling your mattress may lead to premature wear and void your warranty, leaving you unprotected if issues arise. Taking a little extra care when moving it can make a big difference in maintaining its quality, ensuring you get years of comfortable and supportive sleep.

Avoid Excessive Softening and Impressions

Over time, all mattresses soften slightly, and some impressions may form. However, normal softening is not covered under warranty. The warranty only applies to impressions deeper than 1.5 inches.

To minimize excessive wear:

  • Rotate your mattress every 3 to 6 months to distribute weight evenly.
  • Use a high-quality mattress protector to reduce pressure points.
  • If you notice sagging, check that your foundation is providing proper support.

Preventing deep impressions keeps your mattress in top shape and protects your warranty rights.

Do Not Cut or Alter the Mattress

To keep your Plank Firm mattress in top condition and maintain its warranty, it’s essential to avoid any modifications. Many people don’t realize that even small changes can void their coverage. This means you should never cut into the foam or remove the cover, no matter the reason. Even taking off the law tag—the one that says “Do Not Remove”—can make your warranty invalid. Additionally, while heating pads and electric blankets may seem harmless, they can actually damage the foam layers over time, affecting the mattress’s performance and durability. 

Plank Firm mattress requires that the mattress be used exactly as intended, without alterations. Making any modifications, even unintentionally, could leave you without warranty protection if an issue arises. By following these simple guidelines and keeping your mattress in its original condition, you’ll ensure both its longevity and your peace of mind for years of comfortable sleep.

Plank Firm

Credits: Plank

Always Keep Your Proof of Purchase

Keeping track of your proof of purchase is essential when it comes to protecting your Plank Firm mattress warranty. Brooklyn Bedding requires a valid receipt for any warranty claims, and if you misplace it, they may not honor your request. This is especially important when returning a Plank Firm mattress or seeking a replacement due to defects. To stay prepared, always save your email receipt in a secure folder where you can easily access it. If you purchased your mattress in-store,

It’s a good idea to scan or take a photo of your paper receipt to avoid losing it over time. Additionally, if Brooklyn Bedding offers the option, consider registering your mattress on their website for added security. Having proper documentation ensures that if any issues arise, you can quickly and easily claim repairs or replacements without unnecessary stress. A little organization now can save you a lot of hassle later!

Plank
Check Price

Plank Firm

A flippable all-foam mattress featuring high-density foam layers for superior support and comfort.
Check Price

Plank Firm

A flippable all-foam mattress featuring high-density foam layers for superior support and comfort.
Check Price

Protect Your Investment

Your Plank Firm mattress is designed for durability and support, but maintaining its quality—and keeping your warranty intact—requires a little care. Many people unknowingly make small mistakes that can void their warranty, leaving them unprotected if an issue arises. To ensure your mattress remains covered for years, always use the right foundation, as improper support can lead to premature wear. Keep your mattress clean and stain-free by using a waterproof protector, and rotate it regularly to prevent uneven wear. 

Avoid leaving it compressed for too long, as this can damage the foam, and always keep proof of purchase in case you need to file a warranty claim. By following these simple steps, you’ll protect your investment and continue to enjoy the firm, supportive comfort of your mattress without worry. A little attention to maintenance now can mean years of restful, worry-free sleep.

Frequently Asked Questions

Firm (8 out of 10) and Extra Firm (10 out of 10).

Orders ship within 5-7 business days but your order may experience delays through the carrier. Shipping to Hawaii or Alaska starts at $125 per mattress, $45 for accessories. Shipping to Canada is done via DHL and starts at $250 per mattress, $65 for accessories.

Generally not, as the high firmness level might put too much pressure on the hips and shoulders of most side sleepers, especially if they are not very heavy.

Generally not, as the high firmness level might put too much pressure on the hips and shoulders of most side sleepers, especially if they are not very heavy.

It is considered relatively thin compared to other mattresses, usually around 10 inches in depth.

One side is considered “standard firm” while the other is “ultra-firm,” allowing for customization based on personal preference.

We recommend allowing your mattress to sit between 3-5 hours before laying on it.

The Plank Firm mattress is shipped in a box to your doorstep.

To return a Plank mattress, you must first complete the 30-night adjustment period within the 120-night sleep trial. If unsatisfied, email support@brooklynbedding.com with “Return Request” in the subject line. A $99 return fee applies, and Brooklyn Bedding will coordinate mattress pickup for donation or disposal.

The standard Plank Firm mattress is not classified as organic; it is constructed from foam and quilted fabric.

Published On: February 27th, 2025|Last Updated: March 7th, 2025|Categories: Mattress Education|9.9 min read|Views: 34|

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