HOW West Fraser Timber (TSX:WFG) and Stella-Jones (TSX:SJ) Connect Forest Products to Housing and Infrastructure in the S&P/TSX Composite Materials Sector

Two Ways to Sell a Tree

Both companies sit in the materials sector of the S&P/TSX Composite Index, and both start with the same raw material: North American softwood. What they do with it, and who buys it, is where they part ways.

West Fraser (TSX:WFG) is one of the world's largest wood products manufacturers, with more than 50 facilities across Canada, the United States, the United Kingdom and Europe. It makes lumber, oriented strand board (OSB, the engineered sheathing panel nailed to the frame of most new houses), plywood, engineered wood and pulp. Its customers are builders, dealers and home-improvement retailers, so its Earnings track US housing starts and renovation spending closely.

Stella-Jones (TSX:SJ) buys wood and pressure-treats it with preservatives so it can survive decades outdoors. Its biggest products are Utility poles and railway ties, sold under long-term relationships to electricity utilities and railways. It also sells treated residential lumber for decks and fences. In short, West Fraser is a housing play; Stella-Jones is mostly an infrastructure maintenance play with a housing side business.

West Fraser: Waiting for the Housing Cycle to Turn

The housing link shows up plainly in West Fraser's (TSX:WFG) recent numbers. In the second quarter of 2026 the company reported sales of US$1.43 billion and a net loss of US$61 million, or US$0.78 per diluted share. Adjusted EBITDA (earnings before interest, taxes, Depreciation and amortisation, a common measure of operating cash generation) was US$59 million, just 4% of sales, although that was a clear improvement on the negative US$66 million recorded in the first quarter.

The lumber segment contributed US$41 million of adjusted EBITDA, but industry publication Wood Central noted that US$13 million of that came from a favourable adjustment to US duties, meaning the underlying lumber Business earned closer to US$28 million. Chief executive Sean McLaren said Demand for lumber is expected to remain stable in 2026, "reflecting ongoing housing affordability challenges", while pointing to an ongoing US housing Supply Deficit as the long-term support. US housing starts ran at a seasonally adjusted annual rate of 1.43 million units in June 2026, according to the company's release.

Prices have not helped. Lumber futures traded at about US$537 per thousand board feet on 23 September 2026, down roughly 8% from a year earlier, according to Trading Economics.

West Fraser has kept its 2026 guidance intact, including North American OSB shipments of 5.9 billion to 6.3 billion square feet and Capital spending of US$300 million to US$350 million. It finished the wind-down of its High Level, Alberta OSB mill in the second quarter and ramped up its rebuilt Henderson, Texas sawmill. Cash stood at US$74 million at 3 July 2026, down from US$202 million at the end of 2025, with US$55 million drawn on a US$1 billion Credit facility. It kept paying its quarterly Dividend of US$0.32 per share but made no Buybacks under its 2026 normal course issuer bid in the first half.

Tariffs: The Cross-Border Complication

Because much of West Fraser's Canadian lumber is sold into the US, trade policy matters enormously. West Fraser's company-specific combined anti-dumping and countervailing duty rate was set at 26.47% in September 2025, lower than the 35.16% "all others" rate, and a separate 10% Section 232 Tariff on imported softwood lumber has applied since 14 October 2025. A further 50% US tariff on certain Canadian wood panels took effect on 19 August 2026. Lumber and OSB are excluded, but West Fraser estimates it touches roughly 3% of its plywood and 20% of its laminated veneer lumber shipments to US customers. Its large US sawmill and OSB footprint softens the blow, since those mills pay no Import duties.

Stella-Jones: Poles, Ties and the Grid Build-Out

Stella-Jones' (TSX:SJ) second quarter shows the steadier profile of infrastructure demand, even in a softer patch. Sales were C$1.04 billion, roughly flat on a year earlier. Utility products, its largest category, rose to C$510 million from C$476 million, and management expects mid-single-digit Volume growth in wood poles for 2026 as utilities replace ageing poles and harden networks. Railway tie sales slipped to C$235 million as Class 1 railway volumes weakened, and residential lumber fell to C$234 million.

Profitability was squeezed. Adjusted EBITDA fell to C$167 million, a 16.0% margin, from C$189 million (18.3%) a year earlier, on higher environmental, maintenance and fuel costs. Net Income was C$61 million, or C$1.12 per share, after C$32 million of restructuring charges for a railway tie network optimisation that management says should save C$10 million to C$15 million a year. The company expects its full-year 2026 Margin to come in below its 17.5% to 18.5% target range, and the shares fell more than 7% after the release.

The Balance Sheet remains sound: Operating Cash Flow reached C$192 million in the quarter, net Debt was 2.5 times adjusted EBITDA, and Liquidity was C$759 million. Stella-Jones pays a quarterly dividend of C$0.34 per share and bought back C$15 million of stock in the first half. It is also expanding into steel transmission structures through its 2025 Acquisition of Locweld, doubling capacity at its Candiac, Quebec plant to 20,000 tons by the third quarter of 2026, with a new Tennessee Facility due to commission in late 2027.

Side by Side

The Bottom Line

West Fraser and Stella-Jones connect Canadian forests to two very different parts of the economy. West Fraser offers direct exposure to lumber and panel prices and to a US housing recovery, which gives it considerable upside if Mortgage rates fall and building picks up, but it is currently earning thin margins and faces an unusually heavy stack of US duties and tariffs. Its conservative balance sheet and large US mill base help it wait out the cycle.

Stella-Jones trades that cyclical upside for steadier demand driven by utility grid spending and railway maintenance, and in the second quarter earned an adjusted EBITDA margin four times higher than West Fraser's. Its risks are different: cost inflation, weaker railway volumes, execution on its steel expansion and a 2026 margin that is running below target. Investors comparing the two are really choosing between a bet on the housing cycle and a bet on the slow, necessary replacement of North America's infrastructure.