
Kingsdown Twin Xl High Profile Foundation
Will It Fit?
SKU: 50883478
You'll Love Kingsdown
Kingsdown foundations are meticulously hand assembled using sustainably sourced Canadian Spruce, which is exceptionally durable. Each piece of lumber is not only heat-treated, but kiln-dried, which improves the performance of the wood over time. Each wooden slat is placed more closely together and cut a full inch wider than most manufacturers to provide a sturdier base.
Collection
Box Spring
Warranty
10 year limited warranty -
Code J -
View WarrantyColor
Black
Foundation height
9 inches
Pattern
Solid
Upholstery material
Fabric
Q&A answers generated with AI assistance.
Does this foundation require home assembly?
No, this foundation is meticulously hand-assembled by craftsmen before it reaches your home. It arrives fully built and ready for immediate use, allowing you to complete your bedroom setup without the need for tools or the hassle of complex instructions.
Why is a solid foundation often preferred over a traditional box spring?
Unlike a traditional box spring that uses flexible wire coils, this solid wood foundation provides a completely flat, non-yielding surface. This rigid support is essential for modern memory foam and hybrid mattresses, as it ensures they stay perfectly level to provide correct spinal alignment and prevents the internal mattress materials from shifting or warping.
What is the benefit of a "high profile" 9-inch foundation?
A 9-inch high-profile foundation provides a traditional bed height, making it easier to get in and out of bed compared to lower-profile options. This height is ideal for standard bed frames and is a popular choice for larger master bedrooms where a taller bed profile creates a more substantial, elevated aesthetic.
How does the slat construction provide better support for a mattress?
To provide a sturdier base than standard models, the wooden slats in this foundation are cut a full inch wider and placed more closely together. This increased surface area offers superior reinforcement for your mattress, helping to prevent the sagging and dipping that can occur with less robust support systems, thereby extending the life of your mattress.
Why is kiln-dried Canadian Spruce used in this foundation’s frame?
This foundation is crafted from sustainably sourced Canadian Spruce that has been both heat-treated and kiln-dried. The kiln-drying process is a critical quality step that removes deep-seated moisture from the wood, significantly reducing the risk of warping, shrinking, or cracking over time. This expertise in material preparation ensures the frame remains structurally sound and silent throughout its lifespan.
Can two of these foundations be used together for a split king bed?
Yes, two Twin XL foundations are the standard requirement for a King or Split King mattress setup. At 80 inches long, they provide the necessary extra length for "XL" mattresses. Placing two side-by-side creates a stable, 78-inch wide base that is much easier to navigate through narrow stairwells or apartment doorways than a single-piece king foundation.
39.00"w x 80.00"d x 9.00"h

4 out of 5 stars
Not comfortable
Took out some foam but not comfortable. Hard. Do like the cover
Review provided by Sealy
Advanced technology for premium protection
This review was collected as part of a promotion
This protector is the best I've seen. It offers complete water-proof protection while still working with the mattresses cooling technology. It has a comfortable fit and a material that is not plastic or noisy.
Review provided by Sealy
Luxury base for deep sleep and rejuvenation.
This review was collected as part of a promotion
This mattress Smart Base is the finest I've ever experienced. It has total flexibility with positions, advanced waveform massage therapy, and even a beautiful remote. The soundscape mode that lets you play nature sounds and music through the beds speakers are immersive and relaxing. If you want to sleep deeper and rejuvenate your body, this is the frame for you. I will also add that the white glove delivery service was incredibly easy and professional.
Review provided by Sealy
Nice fit nice color!
This review was collected as part of a promotion
The shirt is of soft material. A great sleep shirt.
Review provided by Sealy
Odor
This review was collected as part of a promotion
The pillow works great just like the previous Tempurpedic pillows I bought. It has an odor that comes out of it that is unpleasant. Reviews say it goes away, mine hasn't yet after a month.
Review provided by Sealy
















