First off the old carpet must be thoroughly cleaned.
Can you lay carpet over old carpet pad.
This goes for all carpet over carpet projects the old carpet underneath can transfer mold dirt and other debris into your new carpet.
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.
Most residential applications consist of a carpet stretched over an underpad and secured around the perimeter of the room with tackless nail strips.
Reasons not lay carpet over carpet.
After putting the layer of plywood over your existing carpet you can proceed to glue the pieces of carpet tiles according to your design or chosen pattern.
Carpet tiles can be laid over old carpet with a bit of effort.
New carpeting can pick up a stain from an old cushion when the cushion has retained some of the liquid and it wicks up into the new carpeting installation.
First ensure that you have properly measured and calculated for carpeting based on the width of the carpet you have selected usually either 12 or 15 feet.
If it is a light weight cushion that has been in for a number of years it may not serve you to retain it.
A completely clean carpet is necessary before proceeding.
Even if it s an unconventional idea there are many advantages at first glance to installing a new carpet over an old one.
Carpet cushion can retain spills and odors from the previous usage.
It will need time to dry and you don t want to disturb it.
Next determine the type of installation.
If you layer one carpet over another you won t have to spend time and money ripping out and throwing away the carpet that s already in place.
It s a good idea to start from the inside out if you re using adhesive.