My husband just put in a new tile bathroom floor and we have carpet in the hallway. He put in a threshold piece of marble. We need to know how to butt the carpet up to it so it lays flat and does not have a hump, but we can't put a piece of metal or wood down because it does not match....how do we fix this?

 

If the marble is higher then the carpet, you may have to fold the carpet back, and ramp to the threshold, to raise the carpet.

A low pin tackstrip or taking layers of duct tape on top of the tackstrip to lessen the pin length so it doesn't poke your bare feet(low pile or wore out carpet) is suggested. Tackstrip back off the threshold just the thickness of the carpet, so you have a gap to tuck the cut edge. Stretch the carpet up on the pins(if you don't stretch it it will create a bubble) trim the excess if there is any(you want it about a ¼" longer to tuck in) Before you tuck it, squirt some latex seam sealer into the gully/gap between the tackstrip and the threshold, and tuck the carpet, for a lasting secured hold.