Gasket - Flexitallic ommended that when using standard tongue and groove flanges a compression stop is provided to prevent any over-compression of the gasket.Mendocino County Residential Construction Manual Items 1 - 6. Every sleeping room and any basement must have at least one. 2 x 8 tongue- and-groove subfloor is placed perpendicular to girders.Installing tongue and groove pine pan. - Fine Homebuilding Dec 11, 1999. In an exterior application of T&G the tongues MUST face up so water doesn't. Blind nail through the tongue with a nail gun works well.How to Do Blind Nailing - YouTube Leah demonstrates how the blind nailing technique for attaching "tongue and groove" wood boards to a floor, wall, or other surface.What Nails Should I Use For Tongue and Groove Pine? Although tongue and groove installation is very secure, you still want to nail them in place to minimize any movement, especially as the board expands and.