California King Split Box Springs & Foundations

By Alwyn Home

California King

Upgrade your sleep setup with this heavy-duty metal box spring designed for strong, stable mattress support. Featuring reinforced steel slats, noise-free construction, and a clean fabric cover, this 9-inch foundation offers lasting durability with easy assembly and reliable everyday comfort.

Best box spring I've ever had. Easy setup!. Stacey King. Bronx, NY. Tue Jun 23 2026

By White Noise

California King

The bunkie board split bunkie board provides a surface foundation for any platform beds, bunks, and daybeds. It adds support to the mattress and will keep the mattress stay in good shape thus extending the life of your mattress. It will give firm bottom support for the mattress and raise the mattress by about. When a mattress is placed directly on slats or metal springs, the mattress will tend to rip or sink. These can be avoided with the use of a bunkie board. Using a bunkie board doubles the mattress' life expectancy. This bunkie board is a good alternative instead of a box spring that may be too high for day beds. It will give the bed a lift without adding much height. This bunkie board is strong enough to be used directly on the bed frame instead of a box spring. It will give the mattress a lift which is quite low but will hold up the mattress. It is wrapped in a stitch-bonded nonwoven fabric. It meets federal standards 1632 and 1633 fire codes. This bunkie board will give you enduring comfort and durability for excellent sleep. The split design will give you convenience and easy mobility since the 2 piece varieties are very lightweight utilizing 2 smaller pieces making them easier to carry and manoeuvre through the cramped quarters of an apartment house. Continuously aims to be the most reliable direct mattress manufacturer in the industry. With our prominent name and superior service, we satisfy customers all over. All of our products are made in the country to ensure that you get only the best. We take great pride in the quality of our products and the quick service we provide. Our customers are our best advertisement. Customers and business partners alike have experienced the company's commitment to the unbeatable service we provide for their high-quality products.

This was perfect to add a little height and support for my new mattress.. Susan. Deerfield Beach, FL. Mon Jun 29 2026

By Alwyn Home

California King, Low Profile (4")

We are a proud manufacturer of the finest quality box Springs, with the highest standards in durability, quality, comfort, & beauty. All of our products are made in the USA to ensure that you get only the best! This item is part of our Hollywood collection, it has the following features: this box spring is uniquely designed to give you the kind of undisturbed sleep nature intended. Wood foundation, Continental box meets federal standards 1632 and 1633 fire code.

I was a little worried that these were the wrong size for the queen bed, but it’s just the frame opening that’s a bit large - our new queen mattress fit perfectly on top of this base. So pleased with the new accessible height for our bed - our in-laws are coming and I wasn’t sure they could get in the bed before! The split design made getting it into our over-garage guest room up narrow stairs super simple. Quick delivery. Couldn’t be happier.. Susanne. Wilton, CT. Wed Jun 24 2026

By Alwyn Home

California King, Low Profile (4")

Welcome to the Alwyn Home! Here we offer you the best prices for the best quality. Come have a look at our latest Split Fully Assembled Box Spring for Mattress from our Alwyn Home collection. This design is handcrafted so that you forget back pains and discomfort forever. Lay down your favourite mattress on our box spring to enjoy the beautiful sleep you always wanted. The equally distant slats and wood frame does not let the frame loosen up and is strong enough to handle various kinds of duress. You don’t need to worry about a squeaky bed frame ever again. The excellent packaging and design of the box spring are pre-assembled, just the perfect fit for your bedroom. The product is lightweight even as a traditional box spring and lets you have these benefits in assorted sizes namely: Twin, Twin-XL, Full, Full XL, Queen, King, and California King. We have twin profiles of the product in 4” and 8” thicknesses crafted just for your needs.

Easy to transport with it folded!. Andrea. Peachtree City, GA. Sat Jun 20 2026

By Alwyn Home

California King, Low Profile (5")

Discover the perfect foundation for your bedroom with our box spring, designed to combine elegance and durability. Handcrafted with care, the slats are strategically arranged to support your mattress, ensuring lasting stability for years of restful sleep. Featuring Kara-Guard padding, this box spring replaces ordinary cardboard, offering a quiet, noise-free experience that enhances your peace and tranquillity. Choose this expertly crafted box spring and elevate your bed to a true sanctuary of serene sleep.

Very lightweight and easy to maneuver. Made the bed height and comfort level so much better.. Marsha. Midlothian, VA. Fri May 29 2026

By Alwyn Home

Standard Profile (9"), California King

Discover the foundational piece your bedroom with our mattress foundation, a testament to understated elegance and robust support. Handcrafted with precision, the slats are arranged to cradle your mattress, ensuring stability that lasts through years of restful slumbers. The unique combination of Kara-Guard padding, in place of ordinary cardboard, offers a silent guardian against noise, so your peace is never disturbed. Whether you choose the stately 9” regular profile or the sleek 5” low profile, this box spring is a canvas for comfort in any bedroom. Opt for this crafted foundation and transform your bed into a bastion of serene sleep.

It’s a boxspring and certainly does what it does what it needs to! Happy to have easy delivery and set up. Now just waiting for the mattress.. Christine. Wales, WI. Thu Apr 23 2026

By Alwyn Home

California King

Bring added comfort and more restful sleep to your life when you choose to add our two-inch split box spring mattress foundation to your bed. Featuring a slat support system made from North American timber, it has three layers of multi-needle quilting in a white knit fabric with fire-safety stitching.

Solidly constructed. Packaging a bit frustrating.. Wenshuo. NJ. Sat Nov 30 2024

By White Noise

The Galipeau Wood Box Spring is proudly manufactured to ensure the finest quality and the highest standards in durability, quality, comfort, and beauty. This Galipeau Wood Box Spring is uniquely designed to give you the kind of undisturbed sleep nature intended.

This box spring is exactly what was needed in order to lower the bed so that it's now easier to get into bed after surgery. Jennifer K.. Valley City, OH. Fri Aug 18 2023