Re: cannot build decks / foundations in sims 4
There isn't a foundation slider anymore. They've made a new foundation tool as of November 2018.
You get up and down arrows now when clicking on a room. Like shown in the photo below. The foundation tool is outlined.
What I do is select a room to bring up the tool, highlight it, place the mouse pointer over it while holding the left mouse button down and drag it up.
See this for more details: https://sims4.crinrict.com/en/2018/11/foundation-sliders-have-gone-missing/
