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American Walnut Floors on Chicago's North Shore: How to Specify and Source Them

Writer: Joe Avila
Joe Avila
Nov 2
4 min read

Updated: 2 days ago

Hardwood floor with rich natural wood tones

A specifier's guide to American walnut for Winnetka, Kenilworth and Lake Forest homes: hardness, color change, finishes and the checks that keep it steady through a North Shore winter.

Planning a walnut floor on the North Shore? Call Joe Avila at (908) 232-6600 or book a virtual consultation.

American black walnut is the floor North Shore clients ask for when they want a warmth and depth that oak can't give, from Winnetka and Kenilworth to Lake Forest. It is also softer and more sensitive to light than oak, so the choices made at the specification stage decide how it looks years from now. Here is how we specify and source it, then vet the installer before work starts.

Why Designers Choose Walnut Over Oak

Wood floorboards laid out during installation
Walnut is approved from real board samples, never from a single photo.

Walnut's dark brown heartwood, pale sapwood and soft, flowing grain read richer than oak in a library, dining room or paneled study. Walnut boards also vary more in color and figure from one lot to the next than most oak, so we weigh it against other wood flooring choices and approve real samples before any order is placed.

Hardness, Wear And Where Walnut Belongs

Large hardwood floor in a formal room
Formal rooms and studies suit walnut better than a busy mudroom.

Walnut is noticeably softer than red or white oak on the Janka hardness scale, so it shows dents from heels, chair legs and pets sooner. It suits formal rooms, bedrooms and studies better than a mudroom or a busy kitchen. Where it must run through high-traffic areas, we discuss a low-sheen finish that hides wear and record the trade-off in writing, so normal wear is never mistaken for one of the common hardwood flooring defects.

Color Change, Sunlight And Finish Approval

Finished wood floor showing natural color variation
Finish and color are signed off on a sample board kept on file.

Walnut changes color with light. Unlike cherry, which darkens, walnut tends to lighten and turn warmer over time, and rugs or furniture can leave outlines. Some walnut is steamed to blend the pale sapwood into the heartwood. We settle steamed or unsteamed, how much sapwood is allowed and stained or natural at the sample stage, as part of our custom colors and finishes process.

Choosing between natural and stained walnut? Call (908) 232-6600 or book a virtual consultation.

North Shore Winters, Lake Humidity And Radiant Heat

Hardwood floorboards in a heated home
Indoor humidity is planned with the mechanical engineer, not after the floor is down.

Homes near Lake Michigan see long, dry heating seasons and humid summers, so a walnut floor shrinks and swells more through the year than one in a steady climate. Winter gaps, or cupping after a wet summer, often trace back to moisture rather than the wood. We set a target moisture content for the boards and subfloor before delivery and plan humidity control with the mechanical engineer.

Radiant heat, common in North Shore renovations, adds another variable. We confirm the system has been tested and run before installation, follow the flooring manufacturer's surface temperature limits, and let the flooring acclimate to the conditions it will live in. The same thinking guides our floors for the dry air of Aspen and Vail.

Engineered Or Solid Walnut

Wood floor boards fitted together
Construction is chosen after the site is tested.

Engineered walnut, with a walnut wear layer over a stable core, is usually the steadier choice for wide boards, radiant heat and concrete slabs. Solid walnut can work over a dry plywood subfloor in a well-controlled house and allows more future sandings. We weigh both against the site, the same way we compare rift and quartered oak in Bergen County and European oak in Westchester.

Our Checks Before And During Installation

Wood floor detail checked during installation
Each check is logged so the record exists if questions come up later.

  • Moisture readings of the subfloor and the delivered boards, logged before work starts

  • A pre-installation site inspection of subfloor flatness and fastening

  • Delivered grade, color and dimensions checked against the approved sample

  • Layout and board mixing reviewed so color and sapwood spread evenly

  • Finish coats inspected before furniture and rugs go down

If a problem shows up after the job, an NWFA certified wood inspector can compare the floor against these records and the specification. You can see what that review covers in what a hardwood floor inspection includes.

Specifying walnut for a North Shore project? Call (908) 232-6600 or book a virtual consultation.

Quick Answers

Is walnut too soft for a hardwood floor?

No, but it is softer than oak and shows dents sooner. It works best in formal rooms, bedrooms and studies, with a finish chosen to hide wear.

Does a walnut floor change color?

Yes. Walnut tends to lighten and turn warmer with light, so we approve color and finish on real samples and plan for rugs and window treatments.

Should a North Shore house use engineered or solid walnut?

For wide boards, radiant heat or concrete, engineered is usually the steadier choice. Solid can work over a dry wood subfloor with good humidity control. We decide after testing the site and checking moisture content.

Do you work in Winnetka, Kenilworth and Lake Forest?

Yes. We consult on Chicago's North Shore and nationwide from our Westfield, NJ office, and offer virtual consultations anywhere.

Planning A Walnut Floor On The North Shore?

Large wood floor installation in progress
Every stage is checked against the specification before the next begins.

National Wood Floor Consultants specifies and sources walnut, oak and patterned floors for North Shore architects, designers and owners, then oversees installation. Call (908) 232-6600, book a consultation, or read about our flooring specification services and materials and contractor vetting.

Have a question about your own floor? Call (908) 232-6600, email joe@hugginsflooring.com or book a virtual consultation with Joe Avila, NWFA certified wood flooring inspector.

About The Author

NWFA certified wood flooring inspector logo

Joe Avila is the founder and lead consultant of National Wood Floor Consultants, with 26 years in wood flooring. He is an NWFA Certified Wood Flooring Inspector, installer and sander, and teaches accredited AIA, ASID and IDCEC continuing education for architects and designers. His project experience includes Montclair University, One Wall Street, institutional and landmark buildings, and luxury residences and penthouses, and he pioneered subfloor sound-attenuation systems for New York City apartments. Read Joe's full profile.

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