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1/4" Square Solid Wood Tongue and Grove Tambour Panel, 11/16" thick x 4 5/16"width x 112"long Solid Wood Panels White River Hardwoods Poplar
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1/4" Square Solid Wood Tongue and Grove Tambour Panel, 11/16" thick x 4 5/16"width x 112"long

$69.18 - $177.23
$69.18
$69.18 - $177.23
$69.18
SKU SWP302POP
Made in USA Trade Program Available
Email to Order
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Technical Resources

CAD Files & Product Drawings

File Type Description Download
2D CAD File AutoCAD .dwg — profile cross-section for specification Download
Product Profile PDF spec sheet with dimensions & installation notes Download

CAD files are for specification purposes. Dimensions are nominal — verify with physical sample before final spec. Contact your White River rep for custom profile drawings.

Estimated lead time — 7–10 business days, subject to inventory availability

Special order item — cannot be returned.

Need Help? Call 1-800-558-0119 or email sales@whiteriver.com

Shipping Policy

Harmony Acoustic Panels $25 FedEx within the 48 contiguous United States.
Tambour Panels Shipping charges are 6% of the total sale.
Carvings Free FedEx within the 48 contiguous United States. Trade orders excluded.
Specialty Mouldings Freight calculated by destination. Minimum $45. LTL orders receive a separate emailed quote.
Composition & Plaster Shipping charges are 15% of the total sale. Custom & non-returnable.
Plaster Medallions Shipping charges are 15% of the total sale plus a $75 crate fee. Custom & non-returnable.
Urethane Products Minimum shipping charge of $25.
International Orders Minimum 30% of order total. Customs, duties, and tariffs are the responsibility of the recipient.
Full Shipping Details →

White River Hardwoods · Solid Wood Paneling

1/4″ Square Solid Wood Paneling

SKU SWP302POP · 5 Species · Made to Order

Solid Hardwood · Tongue & Groove · Does Not Flex · Made in the USA


The finest square profile in solid tongue and groove hardwood. At 1/4", the clean geometric pattern creates exceptional surface density — 11/16″ thick, 4 5/16″ wide, 112″ long. Pure geometry in premium North American hardwood.

Proudly Made in the USA from Premium North American Hardwoods

At 1/4", the square profile is the most minimal and most detailed surface in the SWP collection — geometry in solid wood at its finest pitch.

Available Options

Species & SKUs

SKU Species Dimensions Min. Order
SWP302POP Poplar 11/16″ × 4 5/16″ × 112″ 21 Pieces
SWP302MA Maple 11/16″ × 4 5/16″ × 112″ 21 Pieces
SWP302RO Red Oak 11/16″ × 4 5/16″ × 112″ 21 Pieces
SWP302WO White Oak 11/16″ × 4 5/16″ × 112″ 21 Pieces
SWP302WA Walnut 11/16″ × 4 5/16″ × 112″ 21 Pieces

* Pricing is per 112″ length. Minimum order of 21 pieces per species. Made to order — standard lead time 2–3 weeks. Contact White River Hardwoods for larger quantities or project quotes.

Why Solid Wood Paneling

The SWP Difference

▬

1/4″ Square Profile

Flat-topped square planks at the narrowest pitch in our SWP lineup. At 1/4", the pattern creates a densely textured surface that reads as almost continuous grain from a distance and reveals its precision up close.

↔

Pairs with Tambour

Every SWP profile corresponds directly to a Tambour variant. Mixing flat walls with curved surfaces in the same space? Run SWP on the flat sections and Tambour on the curves — same profile, same species, same finish. Seamless.

🌲

5 Species Available

Choose from Poplar, Red Oak, Maple, Walnut, and White Oak — all premium North American hardwoods. Poplar takes paint beautifully and is our most economical species. Oak, Maple, Walnut, and White Oak are ideal for stained applications.

🎨

Finish Your Way

Panels arrive sanded and ready for staining or painting. Pre-finishing the back face before installation is recommended — it equalizes moisture absorption and reduces the risk of cupping over time.

Technical Specifications

Key Facts

Profile

1/4″ Square

Construction

Tongue & Groove

Backing

Solid — No Flex

Thickness

11/16″

Width

4 5/16″

Length

112″

Min. Order

21 Pieces

Lead Time

2–3 Weeks

Use

Interior Only

Before You Install

Storage, Handling & Acclimation

Acclimate First — Always

On receipt, store flat in a controlled interior environment. Allow a minimum of 48 hours to acclimate before finishing or installing. Stack with spacers between planks for air circulation. Solid tongue and groove panels are sensitive to moisture — acclimation ensures dimensional stability and reduces the risk of gapping or cupping after install.

Interior Use Only — Does Not Flex

SWP panels are solid hardwood tongue and groove — they will not bend around curves or corners. For curved surfaces, use the corresponding Tambour flexible panel in the same profile. SWP is not suitable for wet or high-humidity environments.

Installation

Step by Step

1

Prep the Surface

Wall or substrate must be clean, flat, dry, and structurally sound. Tongue and groove panels require a solid, even substrate — check for high and low spots before you start.

2

Acclimate — 48 Hours Minimum

Never skip acclimation. Stack planks with spacers in the installation room for at least 48 hours. Check moisture content if a meter is available — target 6–9% MC.

3

Pre-Finish the Back (Recommended)

Apply a sealer coat to the back face before installation. This equalizes moisture absorption on both faces and significantly reduces the risk of cupping — especially important for painted applications.

4

Apply Adhesive & Nail

Use a quality construction adhesive in continuous beads — perimeter first, then horizontal runs every 6″. Supplement with 15- or 16-gauge finish nails or brad nails through the tongue at each framing member.

5

Leave Expansion Gaps

Leave 1/16″ between adjacent planks and a 1/8″ gap at all perimeter edges. Solid wood moves across the grain seasonally — these gaps are not optional.

6

Finish After Install

Fill nail holes, sand lightly across all planks, then apply your chosen stain, paint, or clear finish. Apply in thin, even coats and allow full dry time between coats.

Installer Advice

Pro Tips

Check Your Moisture

High MC at install means shrinkage gaps later. Low MC means potential swelling and buckling. Target 6–9% before you nail anything down — a moisture meter is cheap insurance on a custom hardwood install.

Mix Planks from Multiple Bundles

Natural hardwood varies in color and grain. Pulling from several bundles and mixing planks as you work prevents banding — where one bundle's color is concentrated in one area of the wall.

Combine with Tambour on Curves

SWP on flat surfaces, Tambour on curved or radius surfaces — same profile, same species, same finish. Plan your layout before you start so the two materials meet cleanly at the transition.

Made to Order — Lead Time & Minimums

SWP panels are made to order in your chosen species. Standard lead time is 2–3 weeks from order confirmation. Minimum order is 21 pieces per species. For larger quantities, custom lengths, or project-specific requirements, contact White River Hardwoods for a tailored quote and timeline.

The 1/4″ Square SWP — solid tongue and groove hardwood, 11/16″ × 4 5/16″ × 112″, made in the USA.


Products cannot be returned without prior approval and must have a Return Goods Authorization (RGA) number. Under the following circumstances, products may not be returned for credit:

  1. Are marked on
  2. Are modified in any way
  3. Have been exposed to excessive sun or moisture
  4. Have sheetrock mud, primer, stain, "job site damage"
  5. Returned 60 days after invoice purchase date

Returns are F.O.B. Buyer and are subject to a 20% restocking charge. To receive credit for stock products, product must be received in re-sellable condition. Custom mouldings and custom woodcarvings are not returnable under any circumstances. If returned products are received damaged due to poor repackaging, no credit will be processed. It is imperative that items are not returned in their original packaging without a thorough inspection as more fill may be needed to boxes of carvings or additional wrapping for mouldings may be necessary to prevent return shipment damage. Please call  1-800-558-0119 and speak to our Customer Service Representative to request an RGA.

*Claims for packages marked "delivered" must be filed after 5 days and before 15 days from the date the package was marked "delivered." Claims for packages presumed to be lost (where the status is not "delivered") must be filed after 7 days (20 days for international) and within 30 days from the last checkpoint.

Shipping rates vary by product category — see the rate table on each product page. Residential LTL deliveries require capable help to unload. Inspect all shipments within 15 days and report damage immediately. Customer is responsible for all freight charges, including residential delivery fees and liftgate charges.

Full Shipping Policy →

Monday through Friday, 8:00 a.m. — 5:00 p.m. Central Standard Time

Phone: 800-558-0119

email: sales@whiteriver.com

1197 Happy Hollow Road
Fayetteville, Arkansas 72701 (map)
Toll Free: (800) 558-0119
Phone: (479) 442-6986
Fax: (479) 444-0406

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