1x4 Douglas Fir Tongue & Groove Flooring - C & Better Grade

Prices are Listed Per Linear Foot (lf).

Have questions about this product?
Call us at 800-299-8981.

1x4 Douglas Fir – C Grade Flooring Features & Benefits:
• Beautiful clear, vertical grain with an exceptional strength-to-weight ratio
• Perfect for interior and covered exterior floors and ceilings
• Suitable for paint and stain finishes
• Fortified by Sierra TRU-CORE® Preservative and protected by a lifetime warranty against damage from termites and fungal decay
• Sourcing certified by Sustainable Forestry Initiative (SFI)

1x4 Douglas Fir – C Grade Flooring Specifications:
Width: 3 1/8”
Thickness: 3/4”
Available Lengths: 7’, 8’, 9’, 10’, 11’, 12’ – Specified piece counts are available depending on current stock at time of order.
Grade: WWPA C & Better Clear Vertical Grain (CVG)
Drying Type: Kiln-Dried
Profile: Flat surface, milled smooth with square edges
Installation Type: Stainless Steel Nail or Screw
Cutting Waste: Recommended approximately 5%-10%
Typical Weight per linear foot: 3/4 lb./lf
Manufacturer: Sierra Pacific Industries

Coverage Calculations:
You can calculate the coverage for tongue and groove using our Tips Page, How Do I Determine How Much Lumber I Need? Please call us if you would like a free takeoff on your project as well.

Sierra TRU-CORE® Details:
• TRU-CORE® Millwork Preservative Concentrate protects against damage caused by termites and fungal decay.
• It is a clear, penetrating, paintable water repellent preservative for wood that protects against decay fungi (such as brown or white rot), staining fungi (such as blue stain), surface mold (such as black, brown, or other colored mildew), and dimensional change.
• Sierra Pacific Industries provides a Lifetime Limited Warranty for residential use. The warranty applies to the original owner of the residential structure for as long as he or she continues to occupy the residence. The warranty in not transferable.  
• Sierra Pacific Industries provides a 30 Year Limited Warranty for commercial use. The warranty is offered to the original owner of the commercial structure for as long as he or she continues to maintain title to the structure. The warranty is not transferable.
• Safely dispose of unused materials in a manner that complies with national, state, regional, and local requirements. Do not use for cooking, heating, animal bedding, garden mulch, or enclosed bathing areas.  
• Incineration may be acceptable in commercial or industrial facilities. Otherwise, dispose of in an approved landfill.

Product Guides:
Douglas Fir Species Information
Sierra Pacific TRU-CORE Warranty
TRU-CORE Millwork Preservative Concentrate Data Sheet
TRU-CORE ICC-ES Evaluation Report

Preparation Information:
Our Kiln Dried 1x4 Douglas Fir Tongue and Groove Flooring is ready for installation once received on your jobsite. However, wood will shrink and swell with any changes in moisture content and weather. According to WWPA, to minimize dimensional change after installation, install tongue and groove at a moisture content that matches the local climate as closely as possible. If the climate in a particular region causes wood to maintain 8% to 13% moisture content annually, then the most ideal tongue and groove would be installed at a moisture content within that range, and the material would be stored, stickered and protected for a week to ten days prior to application.

With any unfinished interior wood, applying a quality finish to all surfaces (including the ends) is recommended. An interior finish protects the wood from moisture absorption and UV degradation, and helps prevent any finger stains caused by touching the unfinished wood. On occasion, the tongue and groove may have a mill glaze that is produced when the material is manufactured through the planer. When mill glaze occurs, it is recommended to remove it by sanding prior to staining or clear-coating the wood. Sanding is not recommended as a first option unless every piece is sanded. We offer a wide selection of Water Based Interior Finishes that we can recommend based on the final sheen level and look that is desired. Most interior finishes do not have to be re-coated or reapplied depending on the UV exposure to your home. You can find all the interior stains and finish products that we carry at our Interior Stains page.

Storage Prior To Application:
Prior to installation, all tongue and groove needs protection from direct sunlight, water saturation, snow, ice, dirt, and other elements. Ideally, the tongue and groove should be stored in an enclosed building such as a garage prior to use. It is best to store the tongue and groove flat and off the ground with a vapor barrier so that moisture is not absorbed through the bottom boards of the stack. If stored outside, the siding should be protected with a waterproof covering elevated in the center so that water does not pool on the cover. We also recommend that you do not completely seal the bundle, as good air circulation is required to prevent any blue stain or molding.

More Information
BrandSierra Pacific
End-MatchingSquared End
SpeciesDouglas Fir
Profile Dimensions1x4
Edge Profile Square-Edge Tongue & Groove