It's made with grooves in it so it wouldn't really work.

It was a huge test on my patience, decision making skills and people management abilities.Work Done: Full Vinyl Siding jobFull pex plumbing installationEntire house Sheetrock, paint, carpetElectrical rewiring and updatingPros: House had a brand new shingle roofHuge basement, back yard, and two porchesPrevious owner installed wood tongue and groove throughout the living room and kitchenBrand new 96% efficient NG furnacePlenty of parkingSolid foundationCons: Located on Main StreetOnly has a 100 amp electrical boxVery little insulation in walls and joistsHigh taxesLessons Learned: Stick to your gut when making offers.

The cold down there may be keeping the floors of the first-floor apartment cold, and if those floors are diagonal plank subfloors covered in thousands of pounds of oak tongue-and-groove flooring, as they would typically be in such a structure, that's a lot of thermal mass working against you to keep the first floor cold.You can minimize that from the top by laying down rugs or even carpeting the whole space, but if you can work from below and insulate the cavities between the floor joists with faced fiberglass insulation batts, that should help more.If you are willing to DIY that much insulation work, you can really change the math on the heat equation.

The floors are typically old white or red oak 2 1/4 nail-down tongue-and-groove strip, 3/4 in. thick.

This is one reason why I like good old fashioned tongue and groove pine paneling in rentals. 

This is of course, an opinion from a far...there may be hiccups. 2) Not much...just permit plenty of time and close in the middle of the week...people are already in a groove...closing Friday is a challenge, and people usually need a day to settle into a grove, so no Monday's either. 

Should be at least 3/4 tongue and groove subfloor.

On the other hand, she is more of a partner and a better sounding board than a typical employee might be.You just have to find your groove.

.- We do our best to eliminate carpet and replace it with vinyl click and groove whenever possible.  

We renovated and kept the original beautiful wood doors and tongue and groove ceilings in bedrooms & master bath.So now I'm trying to acquire a bank loan to absorb private loan & rest of Reno.