Here are some important questions that the correct reply will have to evaluate & be based on.
Where in the country, NYC is 3 times the rates in Mississippi so where is really a concern
What type of T&G flooring, Finished Hardwood, Laminate, sub floors etc..
How big is the job. Every tradesman has a minimum just for showing up. That might work out to $50 a foot in a bathroom or $2 per foot for a new house.
What kind of trim level will the installer be responsible for? Laying floors is one price, doing it with complete base & quarter round & door facings will be another.
The sub floor is also critical, & will it be glue down or nail.
The average labor cost depends entirely on the company or person doing the work. The company or individual will need to do an estimate.
yes you can, as long as its treated timber. tongue-in-groove can be used on floors, ceilings, walls or fences. anywhere really.
It wouldn't be recommended. It would be better to cut away the plaster or drywall in the area of the tongue and groove install and put in horizontal framing members to which the tongue and groove can be nailed.
how to water proof tongue and groove
If you install a tongue&groove bamboo flooring, the cost will be about USD8.00/sqm. If you install a click lock bamboo flooring, the cost will be about USD5.00/sqm. The best way is choose click lock bamboo flooring.
The woodworking form "tongue and groove" (also tongue-in-groove) connects separate strips of wood, such as flooring, by having a milled extruding projection or ridge (tongue) on one side, that perfectly matches and fits into a milled concave recessed slot (groove) along the side of the adjacent board.
There are lots of kinds of click-in, tongue and groove flooring available. All you'll need is a hammer and a power saw to install most of the brands out there.
no! no!
A tongue and groove specialist.
wood work
There are many different ways to install hardwood flooring. The easiest do-it-yourself method would be to use those with the tongue and groove joints.
If the face of your tongue and groove is smooth then you don't need drywall. I have one whole room covered in T&G cedar and it looks great.
You will bust off the TOP half of the grooved side. ( because there is nothing under it to support it while driving in the nail. Once the nail begins to hit the bottom edge it wont break because its supported and resting against the floor) Dont nail the Tongue side with nothing under the tongue either because you'll bust off the tongue too. Always connect tongue and groove together so its a solid piece of wood before nailing, or fill in the gap so either end (tongue or groove) is supported from the floor up to where you're nailing.