5/4×4 Board
Nominal 5/4×4 boards in 4 species. Actual thickness varies by material, running 1″ and 1 1/16″, with a consistent 3 1/2″ width. Choose a species above to see its exact milled size, or read the board size guide if you are unsure how nominal and actual sizes differ.
We offer free next-day delivery on orders over $300 within a 50-mile radius of any of our stores. For orders less than $300 within our radius, we charge a $65 delivery fee. For delivery sites outside of our 50-mile radius, we charge a $250 delivery fee, regardless of the amount purchased. Please click here to view a map of our delivery radius.
Product details
| Nominal Size | 5/4 X 4 |
|---|---|
| Wood SpeciesWood type classification to identify material characteristics. | Knotty Alder, MDF, Poplar,  Sage (FJ Pine – Primed)Interior‑grade finger‑joint pine with a smooth factory primer. |
| Board Length | 16′, 4″ sample, 8′, Please contact your local store for current inventory |
| Edge ProfileShows whether the board edges are square (sharp) or eased (rounded). |  S2S2E (Smooth 2 Sides, 2 Eased Edges)Smooth face and back with two eased edges.,  S4S (Smooth 4 Sides)Smooth on all four sides with crisp, square edges. |
Description
5/4×4 Board
Our nominal 5/4×4 boards are part of the 5/4x range and are stocked in 4 species: MDF, Knotty Alder, Poplar, and Sage FJP.
Actual size is not the same in every material. All 5/4×4 boards measure 3 1/2″ wide, but thickness runs 1″ and 1 1/16″ depending on which species you pick. The table on this page lists the exact milled size for each one. It is worth checking before you cut, and it matters a great deal if you are butting two materials together in the same run. Our board size guide explains why nominal sizes and actual sizes differ in the first place.
5/4x, said “five quarter”, sits between 1x boards and 2x boards. It gives you more substance than a 1x without the bulk of a 2x, which is why it has long been the traditional choice for stair treads, window stools and shelving that needs to carry weight without sagging.
If this width is not quite right, 5/4×6 boards the next size up.
Sold in 8ft and 16ft lengths, with 4in samples available if you want to see a species in person before committing. Free delivery on orders over $300 within 50 miles of any of our stores, and you can contact us if you need a length we do not list.
Before you buy
Not sure this is the right profile? Each of these takes a minute.
Know your trim
Every part named, so you order the profile you actually mean.
Interior trim anatomySee it in a room
Try profiles on a real room with your wall and floor colors before you order.
Open the room visualizerMeasure your job
Work out linear feet for one room or the whole house in seconds.
Open the calculatorNominal vs actual size
Why a 1x4 is not four inches wide, and what you will really receive.
Board size guide
