King Split Box Springs
Box springs and mattress foundations from NM, Springwall, Serta, Sealy, Beautyrest, Stearns & Foster, and Tempur-Pedic at National Mattress — available in Single/Twin, Twin XL, Double/Full, Queen, and King sizes from $50 to $520. Choose from three profile heights: standard (7–9"), low-profile (4–5"), or platform (2") to match your bed frame and mattress thickness. Split box springs are available in Queen and King for easy delivery through narrow staircases. All foundations feature solid wood frames with non-skid tops, 10-year warranty coverage, and free shipping across Canada on orders over $199.
How to Choose the Right Box Spring Profile Height
The most important decision when buying a box spring is selecting the correct profile height for your bed setup. A standard-profile box spring (7–9″) pairs with a metal bed frame to bring your sleep surface to a traditional 24–26″ height — ideal if you don’t use a headboard or footboard. A low-profile box spring (4–5″) is designed for thicker mattresses (12″+) or platform-style bed frames where you need to keep overall height in check. For the lowest possible profile, NM® platform foundations stand just 2″ tall and work well inside panel beds or with extra-thick pillow-top mattresses.
All box springs at National Mattress use solid wood frames built from kiln-dried spruce, pine, or fir (SPF) lumber with steel wire support grids and non-skid top fabric to prevent mattress shifting. Split box springs are available in Queen and King sizes from every brand — essential when a one-piece foundation won’t fit up narrow staircases or around tight corners. Every box spring ships with a 10-year manufacturer’s warranty, and NM® and Springwall models are manufactured in Canadian factories.
Three Profile Heights
Standard (7–9″), low-profile (4–5″), and platform (2″) options to match any bed frame and mattress thickness.
Solid Wood Construction
Kiln-dried SPF lumber frames with steel wire grids and corner guards provide stable, even support across the full mattress surface.
Split Box Springs Available
Queen and King split foundations for easy delivery through narrow hallways, doorways, and staircases.
Canadian-Made Options
NM® and Springwall box springs are manufactured in Canada with free delivery nationwide.
Frequently Asked Questions About Box Springs
What size box spring do I need for my mattress?
Do I need a box spring, or can I use a platform bed instead?
What is the difference between a standard and low-profile box spring?
Does my box spring need a bed frame?
What brands of box springs does National Mattress carry?
Do box springs from National Mattress ship free across Canada?
Not Sure Which Box Spring You Need?
Our non-commissioned sleep experts can help you find the right profile height and brand match for your mattress — no sales pressure, just honest advice.
Upgrade your sleep at National Mattress
Discover a mattress that transforms your sleep into a truly rejuvenating experience. We offer a wide variety of options to suit every sleep style and preference, ensuring a better night's sleep.
Why Choose Us?
- Variety: From plush to firm, we have options for every body type and sleep style.
- Quality: Trusted brands and top-notch materials for long-lasting comfort.
- Sleep Trials & Warranties: Enjoy peace of mind with flexible trials and warranties.
- Expert Advice: Get personalized recommendations from our sleep specialists.
Mattress Selection Includes
- Memory Foam: Contours to your body for personalized comfort and pressure relief.
- Hybrid: Combines responsive springs with foam for balanced support and comfort.
- Innerspring: Provides firm support, bounce, and cooling airflow.
- Latex: Hypoallergenic, eco-friendly, and exceptionally comfortable.
- Adjustable Beds: Customize your sleep position for optimal comfort.
