In the video “Why You Shouldn’t Make Furniture from 2x4s,” Colin from WoodWorkWeb explores the challenges associated with using 2x4s, typically construction-grade lumber, for crafting fine furniture.
He starts by showing how 2x4s he recently purchased have significantly warped after just a week in his shop, despite initially being straight and flat.
Colin explains that 2x4s are generally made from a mix of spruce, pine, and fir (SPF), each with different qualities and strengths suitable primarily for construction purposes, not delicate furniture making.
He notes the initial moisture content of the lumber at 18% at the store, which slightly reduced after a week. This content, while suitable for construction, is too high for furniture, as it can lead to further warping and shrinking as the wood dries.
The video addresses three critical topics regarding the use of 2x4s in woodworking: the state of the wood, appropriate joinery techniques, and finishing methods.
Colin highlights that the knots and internal stresses within construction-grade lumber, combined with its moisture content, can cause issues like splitting and warping as the wood dries and adjusts to indoor environments.
For joinery, he discusses why techniques like pocket holes, often used in DIY projects, are not the strongest options for this type of wood.
He suggests alternatives like lap joints for better durability and stability in projects that use 2x4s.
On finishing, Colin cautions against using finishes like polyurethane on moist wood, as it can peel off when the wood dries and contracts.
He recommends allowing the wood to dry properly before applying any finish to prevent finish failure and ensure a longer-lasting piece.
Throughout the video, Colin provides practical advice for woodworkers on managing expectations when using 2x4s for non-construction projects, emphasizing the importance of understanding the material’s properties and limitations.
This video serves as a guide for hobbyists and professionals alike, offering insights into selecting the right materials for their woodworking projects.