How to add a trailing slash when joining paths

Im making a webapp and I'm trying to write views/layouts/*.html
using two vars but filepath.Join only gives views/layouts instead of views/layouts/

var (
	LayoutDir string = filepath.Join("views","layouts")
	TemplateExt string = "*.html"
)

then calling

f, err:= filepath.Glob(LayoutDir + TemplateExt)

And so f contains views/layouts*.html instead of views/layouts/*.html
How should I solve this and is it a good practice to use filepath.Join in this case?

f, err:= filepath.Glob(filepath.Join(LayoutDir, TemplateExt)) should do the trick

or

LayoutDir string = filepath.Join("views", "layouts") + string(filepath.Separator)

or

LayoutDir string = filepath.Join("views", "layouts") + string(os.PathSeparator)

I don't have enough rep to comment - maybe a mod will move my 'answer' to a comment. One quick thing to beware of is this code will produce views/layouts\ on windows machines... I'd just use / instead of filepath.Separator or os.PathSeparator.