By Adalheid Voigt. Modern. At Friday, January 11th 2019, 19:23:25 PM.
Remember that there is a difference between re-covering and reupholstering. Re-covering involves just replacing the fabric, and it is more of a cosmetic procedure. Reupholstering could involve replacing the padding and springs, mending the frame or re-staining any wood. As you can see a complete re-upholstery job involves a lot of labor and replacement of material, and is more structural in nature.
If you plan to use it as the primary sleeping surface for yourself, look into the type of mattress that comes with it. As you are no doubt aware, sleepers come with many different types of mattresses, some using specialty materials, some come with inner-springs and others are air beds. Try and find one with a mattress type you are happy using. Also look for a mechanism that opens and closes easily.
Measuring is not just to get the sofa inside, but also to make sure it is the correct fit for the room. Whether you are placing it against a wall or sitting it in an open space, it needs to fit that space. You also want it to be the same scale as your other furniture and the room as a whole.