Installing Flooring Parallel To Joists

Before starting calculate the width the last row will be.

Installing flooring parallel to joists.

Keep joints that line up at least two rows apart. If the subfloor is stiff enough there is no reason why solid nail down strip flooring can t be run parallel to the joists. If the existing subfloor is 3 4 thick solid and flat with no deflection when walked on you can run the wood flooring parallel with the floor joists to obtain a desired look. If you step on one of those diagonal boards you will see how much it flexes.

I have a client that would like their 3 4 birch flooring to run parallel to the joists. The subfloor is tji joists with 3 4 t g osb glued and screwed. If you have an older house with a shiplap floor the shiplap is perpendicular to the joists so the flooring is parallel to the joists. Is this ok or should another layer of sheathing be put on the floor perpendicular to previous and then install flooring.

Flooring experts recommend installing flooring boards perpendicular to the floor joists in a house with a plywood subfloor. Some houses have the shiplap on a 45. I guess you wouldn t have to lay it parallel but the shiplap has a lot more movement then plywood or osb. This is because it spans as much as 25 30 corner to corner.

The most common way to lay install hardwood flooring is by aligning the planks parallel to the longest wall or run in the installation. Apart from a few exceptions like sagging joists this is the preferred direction to lay wood floors because it provides the best result aesthetically. Installing them parallel creates the possibility that the floor will sag. Join the ends of the boards over a floor joist where possible avoiding joints that form an h.

First renail the existing plywood subfloor so that the old nails are tight and add new nails to achieve a maximum nail spacing of 6 inches. Install hardwood floors perpendicular to the floor joists parallel to the longest wall leaving a inch expansion gap around the perimeter. If you want to install the floor this way you will have to add a layer of 1 2 plywood nailed to the joists on top of the board. I have always installed hardwood flooring perpendicular to the floor joists.