Based on key financial metrics such as the price-to-sales ratio, shareholder yield and the price-earnings ratio, the following 3 stocks made the list for top value stocks in the Building Products industry. Those looking for value stocks to add to their portfolio may want to use this list as a starting point for further investment research.

Why Focus on Undervalued Building Products Stocks?

Value investors seek to buy stocks at a discount to their intrinsic value. Long-term returns show that such strategies are advantageous. Value stocks, as a group, tend to outperform growth stocks over extended periods of time. Typically, value investors perform financial analysis of numerous metrics, don’t follow the herd and are long-term investors.

AAII’s A+ Investor Value Grade is derived from a stock’s Value Score. The Value Score is the percentile rank of the average of the percentile ranks of the price-to-sales ratio, price-earnings ratio, enterprise-value-to-EBITDA (EV/EBITDA) ratio, shareholder yield, price-to-book-value ratio and price-to-free-cash-flow ratio. The score is variable, meaning it can consider all six ratios or, should any of the six ratios not be valid, the remaining ratios that are valid. To be assigned a Value Score, stocks must have a valid (non-null) ratio and corresponding ranking for at least two of the six valuation ratios.

What Goes Into AAII’s Value Grade?

Stock evaluation requires access to huge amounts of data as well as the knowledge and time to sift through it all, make sense of financial ratios, read income statements and analyze recent stock movement. AAII created A+ Investor, a robust data suite that condenses data research in an actionable and customizable way suitable for investors of all knowledge levels, to help investors with that task.

AAII’s proprietary stock grades come with A+ Investor. These offer intuitive A–F grades for more than just value. It is possible for a stock to appear cheap based on one valuation metric but appear expensive on another. It is also possible for one valuation ratio to be associated with outperforming stocks during certain periods of time but not others. Some stocks may even have null values for certain metrics like the price-earnings ratio or the price-to-book ratio but not others. An example of this would be a company with losses instead of profits or a negative book value because of heavy borrowing. Negative earnings or book value result in non-meaningful ratios that are left blank or null.

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3 Undervalued Building Products Stocks

Of course, there are countless value stocks that are worth mentioning, but this is a concise list of the top 3 undervalued stocks in the Building Products industry for Tuesday, December 09, 2025. Let’s take a closer look at their individual scores to see how they measure up against each other and the Building Products industry median.

The Value Grade is assigned based on how each stock’s composite valuation compares to all other stocks.

The process for assigning grades starts with each variable for a given stock. The percentile rankings for all valid ratios that a stock has are calculated. So, for instance, a stock could have a price-to-book ranking in the 43rd percentile, a price-earnings ranking in the 67th percentile, a price-to-sales ranking in the 23rd percentile, etc. Then, those rankings are averaged for each stock. (A minimum of two valid variables are required, though all six will be used if available.)

Once the average of the individual variables is calculated, that average is ranked against all stocks. Put another way, each stock’s composite valuation is compared to all other stocks. These ranks are then sorted into quintiles from the cheapest 20% (a grade of A) to the most expensive 20% (a grade of F).

As always, we recommend that you conduct proper due diligence and research before investing in any security. We also suggest that investors utilize numerous grades, not just value, when it comes to deciding whether a company is a good fit for their allocation needs.

Builders FirstSource, Inc.’s Value Grade

Value Grade:

Builders FirstSource, Inc., together with its subsidiaries, manufactures and supplies building materials, manufactured components, and construction services to professional homebuilders, sub-contractors, remodelers, and consumers in the United States. It offers manufactured products, such as wood floor and roof trusses, floor trusses, wall panels, stairs, and engineered wood products under the Ready-Frame brand name; windows and doors comprising interior and exterior door units; millwork includes interior trim and custom features, such as intricate mouldings, stair parts, and columns under the Synboard brand name. The company also provides specialty building products and services, including vinyl, composite and wood siding, exterior trims, metal studs, cement, roofing, insulation, wallboards, ceilings, cabinets, and hardware products; turn-key framing, shell construction, design assistance, and professional installation services; and lumber and lumber sheet goods comprising dimensional lumber, plywood, and oriented strand board products that are used in on-site house framing. In addition, it offers software products, such as drafting, estimating, quoting, and virtual home design services, which provide software solutions to retailers, distributors, manufacturers, and homebuilders. It serves its products to production builders and small custom homebuilders, as well as multi-family builders, repair and remodeling contractors, and light commercial contractors. The company was formerly known as BSL Holdings, Inc. and changed its name to Builders FirstSource, Inc. in October 1999. Builders FirstSource, Inc. was incorporated in 1998 and is based in Irving, Texas.

Stocks with a Value Score from 81 to 100 are considered deep value, those with a score between 61 and 80 are value and so on.

Builders FirstSource, Inc. has a Value Score of 61, which is considered to be undervalued.

When you look at Builders FirstSource, Inc.’s price-to-sales ratio at 0.78 compared to the industry median at 1.55, this company has a lower price relative to revenue compared to its peers. This could make Builders FirstSource, Inc.’s stock more attractive for value investors.

Builders FirstSource, Inc.’s price-earnings ratio is 20.40 compared to the industry median at 18.60. This means it has a higher share price relative to earnings compared to its peers. This could make Builders FirstSource, Inc. less attractive for value investors.

Now, let’s assess Builders FirstSource, Inc.’s EV/EBITDA ratio, also known as enterprise multiple. At 16.2, when compared to the industry median of 14.0, the company may be considered overvalued in relation to its peers. Value investors could use the enterprise multiple to identify stocks that are considered overvalued or undervalued relative to their industry.

Shareholder yield is the sum of a stock’s dividend yield (paid over previous 12 months minus special dividends) and the percentage of net share buybacks over the previous 12 months. Builders FirstSource, Inc.’s shareholder yield is higher than its industry median ratio of 2.20%. Value investors may look for an attractive shareholder yield because it can be a powerful tool for identifying if the company has a good management team.

As one of the most common value metrics, the price-to-book ratio evaluates a company’s current market price relative to its book value. Builders FirstSource, Inc.’s price-to-book ratio is higher than its industry median ratio of 2.63. This could make Builders FirstSource, Inc. less attractive to investors looking for a new addition to their portfolio.

Lastly, let’s take a look at Builders FirstSource, Inc.’s price-to-free-cash-flow ratio (P/FCF), which can indicate a company’s market value relative to its operating cash flow. Builders FirstSource, Inc.’s price-to-free-cash-flow ratio is lower than its industry median ratio of 24.20. This could make Builders FirstSource, Inc. more attractive because the lower P/FCF ratio indicates that Builders FirstSource, Inc. is undervalued. The P/FCF ratio metric can also be viewed over a long-term time frame to see if the company's cash flow to share price value is generally improving or worsening.

Insteel Industries Inc.’s Value Grade

Value Grade:

Insteel Industries Inc., together with its subsidiaries, manufactures and markets steel wire reinforcing products for concrete construction applications. The company offers prestressed concrete strand (PC strand) and welded wire reinforcement (WWR) products. Its PC strand, a seven-wire strand that is used to impart compression forces into precast concrete elements and structures providing reinforcement for bridges, parking decks, buildings, and other concrete structures. The company’s WWR engineered reinforcing product is used in nonresidential and residential construction. It produces a range of WWR products, such as engineered structural mesh, an engineered made-to-order product that is used as the primary reinforcement for concrete elements or structures serving as a reinforcing solution for hot-rolled rebar; concrete pipe reinforcement, an engineered made-to-order product, which is used as the primary reinforcement in concrete pipe, box culverts, and precast manholes for drainage and sewage systems, water treatment facilities, and other related applications; and standard welded wire reinforcement, a secondary reinforcing product for crack control applications in residential and light nonresidential construction, including driveways, sidewalks, and various slab-on-grade applications. It sells its products through sales representatives to the manufacturers of concrete products, rebar fabricators, distributors, and contractors. Insteel Industries Inc. was founded in 1953 and is headquartered in Mount Airy, North Carolina.

Stocks with a Value Score from 81 to 100 are considered deep value, those with a score between 61 and 80 are value and so on.

Insteel Industries Inc. has a Value Score of 68, which is considered to be undervalued.

Insteel Industries Inc.’s price-earnings ratio is 15.0 compared to the industry median at 18.6. This means that it has a lower price relative to its earnings compared to its peers. This makes Insteel Industries Inc. more attractive for value investors.

Insteel Industries Inc.’s price-to-book ratio is higher than its peers. This could make Insteel Industries Inc. less attractive for value investors when compared to the industry median at 2.63.

You can read more about Insteel Industries Inc.’s key financial metrics like shareholder yield, price-to-free-cash-flow and EV/EBITDA ratio, or learn more about its Momentum and Growth Grades, by subscribing to A+ Investor.

Owens Corning’s Value Grade

Value Grade:

Owens Corning provides residential and commercial building products in the United States, Europe, the Asia Pacific, and internationally. It operates through four segments: Roofing, Insulation, Doors, and Composites. The company offers laminate and strip asphalt roofing shingles, roofing components, and oxidized asphalt. It also provides high, mid, and low temperature products; thermal and acoustical batts, loosefill insulation, spray foam, and foam sheathing and accessories under the Owens Corning PINK, Next Gen, and FIBERGLAS Insulation brands; and glass fiber pipe insulation, energy efficient flexible duct media, bonded and granulated stone wool insulation, and cellular glass insulation and foam insulation under the FOAMULAR, FOAMGLAS, and Paroc brand names. In addition, the company offers residential interior and exterior doors; aluminum framed glass doors and window solutions; and door components, such as frames, sills, weather-stripping, and hinges and locks. Further, it manufactures, fabricates, and sells glass reinforcements in the form of fiber and mats. The company distributes its products to distributors, home centers and lumberyards, installers, retailers, homebuilders, contractors, dealers, parts molders, and fabricators. Owens Corning was incorporated in 1938 and is headquartered in Toledo, Ohio.

Stocks with a Value Score from 81 to 100 are considered deep value, those with a score between 61 and 80 are value and so on.

Owens Corning has a Value Score of 86, which is considered to be undervalued.

Owens Corning’s price-to-book ratio is higher than its peers. This could make Owens Corning less attractive for value investors when compared to the industry median at 2.63.

You can read more about Owens Corning’s key financial metrics like shareholder yield, price-to-free-cash-flow and EV/EBITDA ratio, or learn more about its Momentum and Growth Grades, by subscribing to A+ Investor.

Other Building Products Stock Grades

Value is just one of the five Stock Grades included in our A+ Investor service. AAII members can see the top-graded stocks—those with grades of A or B for value, growth, momentum, earnings estimate revisions and quality—on the A+ Stock Grades Screener.

Also, if you want full access to all of AAII’s premium services, you can subscribe to one convenient bundled plan called AAII Platinum where you can try out A+ Investor, AAII Dividend Investing, the Stock Superstars Report, Growth Investing and VMQ Stocks. With the other premium services, you can dive deep into additional metrics, portfolios, commentary and information about Building Products stocks as well as other industrys.

Choosing Which of the 3 Best Building Products Stocks Is Right for You

Choosing which value stocks to invest in will ultimately depend on your individual goals and allocation; however, comparing similar value stocks in the same industry can help you analyze which might be better investments for you in the long run. So, let’s take a look at the Value Grade for all of our stocks.

• Builders FirstSource, Inc. stock has a Value Grade of B.
• Insteel Industries Inc. stock has a Value Grade of B.
• Owens Corning stock has a Value Grade of A.

Now that you have a bit more background about each of the 3 undervalued stocks in the Building Products industry as well as their overall grades, it’s time for you to conduct additional research to see if these could fit your portfolio needs based on your goals and risk tolerance. AAII can help you figure out both and identify which investments align with what works best for you.

We do so through a program of education that teaches you to invest for yourself and become an effective manager of your own wealth—no more relying on others for your financial independence. You can rely on AAII for timeless articles on financial planning and stock-picking, unbiased research and actionable analysis that makes you a better investor.

A+ Investor adds to that qualitative teaching by giving you a powerful data suite that helps you whittle down investment decisions to find stocks, exchange-traded funds (ETFs) or mutual funds that meet your needs.

Additional Resources About Building Products Stocks

Want to learn more about Building Products stocks to see if they could be the right investment for you? Check out some additional resources and articles to help you on your financial journey.

• 3 Undervalued Building Products Stocks for Tuesday, December 09
• 3 Undervalued Building Products Stocks for Monday, December 08
• Why Modine Manufacturing Company’s (MOD) Stock Is Down 5.57%
• Why CEA Industries Inc.’s (BNC) Stock Is Up 5.95%

AAII Disclaimer

We make no representations or warranties that any investor will, or is likely to, achieve profits similar to those shown, because past, hypothetical or simulated performance is not necessarily indicative of future results. Before making an investment decision, you should consider your circumstances and whether the information on our content is applicable to your situation. This information was prepared in good faith and we accept no liability for any errors or omissions. The full disclaimer can be read here.