Serta is a globally recognized mattress brand celebrated for its comfort-first designs and sleep innovations. With over 90 years of experience, Serta continues to deliver quality mattresses that Canadians can trust.
Serta King Split Boxspring - High Profile 9" - Elevate Your Sleep to New Heights
Transform your sleep sanctuary with the Serta King Split Boxspring, a beautifully crafted 9-inch high-profile foundation that seamlessly blends luxury and functionality. Designed to perfectly support all King size Serta mattresses, it features exceptional build quality and thoughtful design elements like safety corner guards, ensuring a secure and restful night's sleep that revitalizes you for the day ahead.
Key Features
9" Elevated Design: This higher profile boxspring provides the ideal support for your mattress, enhancing your bedroom's aesthetic while ensuring stability during use.
Premium Construction: Featuring a solid wood core combined with a semi-flex metal wire frame, this boxspring is built to last, offering reliable support for years to come.
Non-Skid Surface: The expertly designed non-skid top keeps your mattress firmly in place, allowing you to move freely without worrying about unwanted shifts.
Enhanced Safety Features: With integrated corner guards, this foundation not only protects your mattress but also ensures safety for you and your family.
Benefits
Unmatched Comfort: This boxspring enhances your mattress's comfort level, enveloping you in a cozy embrace that promotes peaceful and restorative sleep.
Effortless Setup: The split design facilitates easy transport and assembly in any bedroom, making upgrades uncomplicated.
Ideal For
Perfect for families or couples with a King size mattress, delivering reliable support and added height for convenient access.
Excellent choice for anyone wanting to revamp their bedroom style while ensuring solid foundational support for deeper sleep.
Details
Dimensions: 76″ x 80″ (inches) – 193cm x 203cm (centimeters)
Height: 9" (inches) – 22.8cm (centimeters)
Warranty: Comes with a full manufacturer's warranty for peace of mind in your purchase.
Guarantees: Experience next day delivery on in-stock items and enjoy our price match guarantee!
Indulge in the luxurious comfort of the Serta King Split Boxspring - High Profile 9! Meticulously designed for exceptional durability and ease of use, this foundation elevates your sleep experience. Embrace the harmonious blend of security and softness every night, transforming your bed into a haven of restful bliss.
A boxspring is used to support your mattress and to add height to your bed.
Support – A boxspring will ensure that your mattress is supported properly, and its weight is distributed evenly throughout the bed. Proper support is essential to maintain the integrity and longevity of your mattress. A boxspring can be placed directly on the floor, or used with any supportive bedframe.
Height – Boxsprings also add height to your bed. Whether you like your bed to be lower to the ground, or higher up, you can find various heights of boxpsrings to make your bed just right. Standard size boxsprings are usually used with bedframes as high as 11 inches off the ground. If your bedframe is higher than 11 inches, you may want to consider a low profile boxspring to make it easier to get in and out of bed. These are just guidelines, so we do recommend measuring your existing bedframe and then deciding on the height of the boxspring you require once you have picked out your new mattress. Mattress heights can differ greatly from one model to another.
Did you know: Bedframes with supportive slats which are spaced no more than 2 inches apart, typically do not require a boxspring. However, to add additional support, you may look into a platform foundation which will not raise the overall height of your bed too much (only 2 inches in height) but will add support if you need it.
Matching boxsprings usually have the same colour fabric as your mattress, however mix-match boxsprings are a great option to save some money as they still provide the support your mattress needs, and once you put on bedsheets and a bed skirt you don’t see the colour of the mattress and boxspring anyways.
We offer FREE DELIVERY to all major cities in Ontario and the surrounding area on orders over $199. A delivery surcharge of $45 applies to orders under $199.
Select your delivery date at checkout (if applicable) and add any special instructions in the order comments (e.g., “Ring Buzzer #1234”). If a date isn’t shown or selected at checkout, you’ll receive an email with scheduling options. Day‑of, you’ll get a text and email with a 2‑hour window and live tracking. Estimates apply to in‑stock items; rural or weather‑affected addresses may require extra time.
Barrie • Innisfil • Orillia • Midland • Collingwood • Bradford • Washago and more
1–3 days on average
Northern & Eastern Ontario
Cobourg • Peterborough • Kawartha Lakes • Minden • Haliburton • Port Perry • Bowmanville and more
1–3 days on average
Western Ontario
London • Stratford • Woodstock • Brantford • Grand Bend • Port Elgin • Tobermory and more
Need delivery outside the GTA?
We also ship to all provinces in Canada at competitive rates (territories excluded). Enter your postal code at the top of the website to see what’s available.
Ready to Sleep Better?
Shop online 24/7 or visit any National Mattress location across Ontario. Spend $199+ and relax—your new mattress will arrive quickly and free of charge locally, or ship fast across Canada.
Where does National Mattress offer free local delivery?
We offer FREE local delivery to major cities across Ontario on orders of $199+. Check the region cards above for specific cities.
Do you ship mattresses across Canada?
Yes. We ship select roll‑packed mattresses to all provinces (YT, NT, NU excluded). Transit times range from 1–2 days in ON & QC to 3–4 days in BC and NL after shipping.
Is next‑day delivery available in the GTA?
Yes. FREE next‑day local delivery is available in many GTA and surrounding areas, subject to inventory and cutoff times.
What if my Ontario local order total is under $199?
A $45 delivery surcharge applies to orders under $199.
How do I schedule or change my delivery date?
Select a date at checkout. If a chosen date isn’t available, you’ll receive an email proposing an alternative—simply reply to reschedule. In‑store purchases can be scheduled at the time of sale.
Will I get tracking updates?
Yes. Local deliveries include day‑of text/e‑mail with a 2‑hour window plus live GPS tracking. Canada‑wide shipments include a courier tracking number once picked up.
Do you deliver to Yukon, Nunavut, or the Northwest Territories?
This box spring may be delivered as a full size unit or as an easy to assemble kit that ships in a compact box. Check the shipping details on the product page for information about packaging, assembly requirements, and whether any special delivery services...
What type of protector and sheets do you recommend for this mattress?
For this breathable mattress, we recommend a breathable, moisture-wicking mattress protector and deep-pocket, natural-fiber sheets that won't compress the comfort layers excessively.
Check the product recommendations or accessories section for options...
Is this Serta mattress considered entry-level, mid-range, or premium?
This Serta mattress occupies a specific tier within the Serta lineup based on its materials, construction, and feature set.
You can gauge its positioning by comparing its specifications and price with other Serta models in the same size and category...
Is this mattress considered eco-friendly?
Yes, this mattress is designed with eco-friendly materials and manufacturing practices such as renewable or recycled components and improved production efficiency.
Check the construction, sourcing, and certifications sections on the product page for...
Will this Serta mattress hold its shape over time?
This Serta mattress is constructed with support and comfort materials chosen to help maintain its shape and feel under normal use.
Review the product details for information on the support system, foam densities, and care recommendations to get the ...
Can this box spring be used with a metal frame or a wooden frame?
This box spring is designed to be compatible with standard bed frames that support the edges and, for larger sizes, provide center support. It can be used on most metal or wooden frames that match the size and have proper support points. Always ensure...
Is this box spring a one piece or split design?
This product page specifies whether the box spring is a single piece or a split construction. For queen and king sizes, look for notes such as "split queen" or "split king" if you need the base to come in two pieces for easier delivery...
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