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Greaton, Premium 38mm Split Wood Bunkie Board for King Size Bed - 4-Piece Under Mattress Support Board, Fully Assembled, Fabric Ventilation Cover - Replaces Wooden Slats or Box Spring for Bed Frames

  • Based on 564 reviews
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Availability: In Stock.
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Arrives Sunday, Jan 4
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Color: Grey


Size: King (80x76")


Features

  • STURDY SUPPORT TO PREVENT SAGGING A sagging mattress can ruin your sleep. This firm supportive bed board keeps your mattress flat and even, stopping dips and lumps before they start. Enjoy a comfortable, well-supported bed that helps you wake up feeling rested.
  • EXTENDS MATTRESS LIFE & SAVES YOU MONEY Mattresses arent cheap... and a mattress without support wears down fast. This strong bunky board keeps everything firm and even, preventing premature wear & tear. Protect your mattress, sleep better, and avoid having to replace it too soon.
  • STRONG VENTILATED WOOD FOUNDATION Built from 1.5" thick split wood with a slatted design, these bed boards for under mattress provide a sturdy foundation that supports heavy weight. The stitched fabric cover adds breathability and reinforces durability, perfect for heavier mattresses.
  • 4-PIECE SPLIT DESIGN, FULLY ASSEMBLED - Unlike a single-piece or foldable mattress board support, this bed support board is split into four quarters for easier handling. Arrives fully assembled. Works with slatted beds and single support frames as a low-profile alternative to a box spring.
  • QUIET LOW-PROFILE BOARD FOR BED FRAMES Box springs add too much height, and regular slats can shift loudly and disturb your sleep. If you want a space-saving base that is also silent, this low-profile bunkie board is the perfect fix. Ideal for both platform beds and standard bed frames.

Description

A STURDY FOUNDATION FOR BETTER SLEEP A mattress is only as good as the support beneath it. Without a solid base, it can sag, wear out faster, and leave you waking up sore. This fabric-covered bunkie board creates an evenly firm foundation that extends mattress life, prevents sinking, and makes it feel more comfortable. Designed for both strength and breathability, it features a 1.5-inch thick wood slat frame wrapped in durable stitch-bond fabric for airflow and stability. Unlike bulky box springs or flimsy slats that shift around making noise – this no-sag, split-design bunkie board keeps your mattress supported day and night. Arriving fully assembled for easy transport, it makes setup easy and fits perfectly into your existing bed frame. Whether you need low-profile support or a replacement for loud wooden slats, this bunkie board delivers comfortable stability without the extra weight. PRODUCT SPECIFICATIONS: Usage: Under Mattress Support Thickness: 1.5 inches Material: Solid Wood (Slatted Frame) Covering: Breathable Stitch-Bond Fabric Twin/Twin XL/Full/Queen/King: 2-Piece Split Design Full/Queen/King/Cal King: 4-Piece Split Design FOR TWIN, TWIN XL , FULL, QUEEN AND KING SIZE BEDS 2-piece split design for Twin and Full sizes. Lightweight and easy to maneuver in tight spaces. Perfect for children’s bunk beds, loft beds, and daybeds where a box spring would add too much height. FOR FULL, QUEEN, KING AND CALIFORNIA KING BEDS 4-piece split design for Queen, King, and Cal King sizes. Provides sturdy support for bigger mattresses. It works great for standard bed frames that need extra strength, helping to stop sagging early and keeping your mattress firm and comfortable longer.

Size: King (80x76")


Color: Grey


Brand: Greaton


Assembly Required: No


Number of Pieces: 4


Manufacturer: ‎Greaton


UPC: ‎015706300446


Assembly Instructions Description: ‎No assembly required


Item Weight: ‎41 pounds


Product Dimensions: ‎80 x 76 x 1.5 inches


Item model number: ‎BBFOLDgv-6/6


Date First Available: September 11, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Jan 4

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Perfect for a low profile queen size bed!
Color: Black Size: Queen (79x59")
Great quality. Fits well on our guest queen size bed. They are just the right thickness and height for this low profile bed. Very easy to assemble, just unfold and place in the frame. I believe they were very well priced. These make the mattress more stable and nothing moves. Perfect!
Reviewed in the United States on July 23, 2025 by A. M. Marcello

  • The best i've tried
Color: Black Size: Twin (75x37.5")
The best bunkie board i've tried bar none. I've tried the fabric covered accordian style wood slats, and i've tried other wood platform bunkie boards from other manufacturers before and none of them felt as sturdy or stable as these. I'm heavy, and there was a noticeable improvement in the support and quality of sleep after putting this on the bed. I will most likely end up getting a queen sized one too! ... show more
Reviewed in the United States on October 14, 2025 by Mikeisgettinupset

  • Easy and it does the job
This was perfect for my son’s conversion bed. It was the kind that starts as a crib, then converts to a toddler bed, then a full bed. We just needed this plus a mattress and we were good to go!
Reviewed in the United States on October 31, 2025 by Christine Chandler

  • No more saggy bed corners!
Color: Black Size: Queen (79x59")
Had wooden slats that kept sliding and making my mattress sag on the corners. Probably sagging everywhere but very noticeable in the corners. Got tired of constantly adjusting the slats and looked for a solution: hello bunkie board. Who knew! Easy installation: came with 2 sets of boards, each set was 2 boards connected by 2 hinges in the middle. Literally opened them up and popped them on the bed frame. Only (hopefully) minor issue was they fit along the top of my frame, not on the inner part of the frame where the original boards were. You can see what I mean in the pictures. Very sturdy so far, no saggy corners or shifting! ... show more
Reviewed in the United States on August 12, 2025 by Beth Beth

  • Not "Solid" Wood
The "solid wood" description is misleading. The frames of the Bunkie board sections are wooden, with one or two wooden cross members, the surfaces are composed of just the heavy duty fabric not a wooden platform. This was likely a misinterpretation on my part; however, I'd rather not have someone else make the same assumption. Additionally, the fabric material is not grey. The underside is solid black and the top is an off white. With all this being said, the product seems to be functional and I'm satisfied with the purchase. ... show more
Reviewed in the United States on February 16, 2019 by Michael B A Holdsworth

  • love these
Color: Grey Size: King (80x76")
easy to put on and perfect hieght for my bed. Didnt need much....My second one to purchase.
Reviewed in the United States on November 9, 2025 by Dogmom328

  • Strong and Quiet
Color: Black Size: Queen (79x59")
I have a large leather bed that I was using the ruin visiting but was crazy high. Although I’m on the tall side, the height was pretty ridiculous when anyone else wanted to get into bed. I didn’t know this product existed, but happy I found it. They arrive as two hinged pieces that set side-by-side inside your frame and once the mattress is put on top, it’s absolutely quiet and you can feel a better supportive difference versus a normal boxspring My Saatva mattress is less than a year old and is amazing but it just got a little better. The other perk was just sliding the box in the door from UPS. You could smell the fresh cut wood, which is never a bad thing. ... show more
Reviewed in the United States on August 14, 2025 by Strengthguy

  • Read the Fine Print - 11” Gaps (King Size)
The purpose of bunkie boards is to eliminate large gaps. Mattress companies recommend for slats to be no more than 5” maximum distance to ensure the mattress is sufficiently supported and does not dip when slept on. Without seeing the wood bars, you will just assume everything is okay. Flipping our brand new mattress every 1-2 months seemed excessive, and we uncovered the reason. 11” gaps. We essentially had the same problem as our bed frame. Pointless purchase. Glad we bought a new bed frame and no longer require these. Unfortunately, they’ll be better repurposed as fire wood than handed down. ... show more
Reviewed in the United States on June 5, 2024 by Chelsea R Daigle

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