They add cost in terms of framing time, fire rating material, engineering, and spray foaming.

@Rashad S. Have

We just stayed at a house that I thought the matress was so comfortable, when I checked to see what make it was, it was a memory foam topper(sleep innovations, 2-3" topper, put that on my list for future purchases) Nice soft  sheets, soft blankets, nice pillows for all preferences and have at least 3 per person available.

I want to be sure that if we do use the inserts, the cavities (where the counterbalance weights now move) are air-sealed and filled with some good insulation (probably cellulose or spray foam).  

Over the winter it was just air-sealed with spray foam, but was pretty chilly up there.

Ask about adding helical piers to the newer foundation or perhaps mud- or foam-jacking under it. 

Originally posted by @Jon S.:Have

Science says so. https://www.rd.com/culture/hair-loss-shaved-head-sexy/ 

More photos and more info at:https://medium.com/@rafamvc/before-and-after-of-12...Total investment : 85000Purchase price: 24700Wholesale fee: 12300Roof, siding, cement pointing, soffits and gutters: 13050Drywall attic and middle bedroom ceiling, tiles & trims, back door: 8800Interior Painting: 2900Plumbing: 1600Electric: 3000Appliances: 2100Refinishing hardwood floors: 2700Attic spray foam insulation: 2100Insurance: 750New boiler (oil to gas conversion): 5200Random miscellaneous expenses: 5800Rented for 1300/mo.Taxes 1800/year.

Our experience has lead us to using closed cell spray foam insulation; we find it the easiest and most effective way to insulate and air seal a balloon framed house.