On the face of it installing new carpet over the old carpet does have some advantages.
Installing carpet over concrete stairs.
It saves on the cost and labor of pulling up and disposing of the existing carpet keeping carpet waste materials out of the landfill.
For the tread start as mentioned above by fastening the carpet to the floor under the nosing and bring the carpet straight over the lip and across the tread.
If you have pie shaped or curved stairs install the carpet on the riser in the same way as mentioned above.
Before you install the carpet make sure to check the concrete for any moisture issues that need to be addressed.
Installing a carpet over concrete will do you a lot of good.
And if the existing carpet was glued down not tacked it can be a huge time saver to lay the new carpet over the old.
Nail the tack strips to the wooden subfloor or if installing carpet over concrete use masonry tacks or an epoxy adhesive attach the strips to the floor.
For starters carpeting provides an affordable quick and impertinent way to turn a flat and uninspiring place into a somewhat inventing and warm place.
You then have two options depending on your circumstances.
To install carpet tile draw the sections that you want to carpet on a piece of paper and arrange the tiles in a design or style that you like before you get started laying down the tiles.
For below grade slabs assume that the concrete floor will get damp at some point.
Any kind of persistent moisture will allow mold to get a foothold and soon ruin carpet or wood flooring.
To install carpet on concrete choose a carpet that is constructed of synthetic products only as natural fibers are often too absorbent.
Then lay tack strips around the perimeter of the room and install your strips of padding.
The only main difference is that there will be a lot more excess to trim.
Spread the indoor outdoor carpet adhesive on the treads and molded edges of the concrete steps using a notched spreader.
And both of the options use the same layers of 1 2 in.
Tack strips are sometimes called tackless strips because they eliminate the need for using individual carpet tacks to hold carpeting to the floor.
Next section off the room into four quadrants and lay the tiles down starting in the center and working your way out.