I wanted to share my experience with the Nature’s Sleep Knock Down (KD) Foundation. According to the specs, i is supposed to have 16 wooden slats but if you count the slats in the photo on the website or what you receive in the box, there are indeed only 14. Nature’s Sleep either changed their design and didn’t update their specs or they are being deceiving and counting the two end-slats that are on the BOTTOM of the foundation.
Either way, the 14 2.25" wide slats create a gap that is ~3.75", above the recommended <3" gap for latex mattresses. To fix this, I did some quick math and determined that I needed 2 more slats (what do you know, that’s 16 slats!) to bring the spacing down to 2.8" gaps. So after a trip to the Home Depot for two .67" thick wood slats, cutting them to 57" long, and pilot-hole drilling, I was able to complete the assembly of the foundation. It came with 6 extra screws, the perfect amount for those 2 additional slats.
Not being able to use the nylon straps for spacing any longer, the assembly took longer as I had to measure off each gap as I screwed the slats down. The cover is similar to a fitted sheet, with an elastic band. You cannot really stretch and secure it in place so there is some billowing on the sides.
Comparison to SleepEZ KD foundation, which is made by US Box Spring (USBS): I previously had SleepEZ’s foundation but it was not tall enough for what I wanted. To compare, the USBS cover has velcro tabs on the bottom so it looks a little better than the N.S. Cover. The USBS did squeak a bit when I got into bed, likely due to the wing nuts. The NS is all screws so it has not made any noise thus far. It does take more time to assemble and a power drill is a must since you are screwing in ~66 screws. The USBS foundation did have the proper 16 slats and <3" gap though!! The assembly time for the USBS is quicker due to the wing nuts design and the slats not being screwed down. They roll out onto the frame and have velcro on the ends to hold it in place. When I stood the foundation vertically, the velcro gave way and the slats fell down so just a word of caution there.
BTW, the Nature’s Sleep Foundation is available for $200 (and even 10% off right now, which I didn’t get when I bought it).
Attached picture of the assembled Nature’s Sleep Foundation, without the cover.