Fir Porch Flooring (Mixed grain) – LMG1x4T&G Call For Quote $1.43 Interior/Exterior Flooring 23/32″ x 3-3/8″, 3-1/8″ face View Product Catalog Fir Porch Flooring (Mixed grain) - LMG1x4T&G quantity Add to list Want a discount? Become a member. SKU: LMG1X4T&G Category: Exterior Description Description Tongue and Groove porch flooring 23/32″ x 3-3/8″, 3-1/8″ face LMG1X4T&G – Mixed Grain Fir Available in random lengths.