Gluing Pressure Treated Lumber: Tips And Tricks
Pressure treated lumber is a popular material for outdoor projects due to its durability and resistance to rot and insect damage. However, joining pieces of pressure treated lumber together can be a challenge.
While screws and nails are commonly used for this purpose, gluing can also be an effective option. Gluing pressure treated lumber requires specific considerations in order to ensure a strong and long-lasting bond.
One of the most important factors to consider when gluing pressure treated lumber is the type of glue to use. Not all glues are suitable for use with pressure treated lumber, as the chemicals used to treat the wood can interfere with the adhesive properties of some types of glue.
In addition, the outdoor environment can put additional stress on the glue, requiring a strong and durable adhesive. Proper preparation of the wood is also important for achieving a successful glue joint.
This article will explore the question of “Can you glue pressure treated lumber?” and the best types of glue to use for pressure treated lumber, as well as important considerations for selecting and using glue, and alternative joining methods to consider.
Types of Glue
Different types of glue are available for gluing pressure treated lumber, but the choice of glue should depend on the conditions the glue will be exposed to and the requirements of the project.
Resin glue, also called epoxy glue, is waterproof and considered to be the best option for pressure treated wood. It can handle moisture, porous end grain, and can be used on both smooth and rough surfaces. Resin glue can also be used to fill gaps and reinforce joints, making it a versatile option for various projects.
Polyurethane glue, on the other hand, is water-resistant and works well on damp wood. It can be used on both porous end grain and smooth surfaces, but it tends to foam up as it dries, making it difficult to use on visible joints or surfaces.
Titebond III is a good adhesive for outdoor furniture and cut boards, and it is waterproof and can be used on both porous end grain and smooth surfaces.
Yellow glue is a strong option for furniture and cabinets, but it is not waterproof and should not be used on outdoor projects.
Finally, cyanoacrylate glue is a fast-bonding option for reinforcement and gap filling, but it is not suitable for use on porous end grain or outdoor projects.
Considerations for Glue Selection
When selecting an appropriate adhesive for pressure treated wood, it is important to consider the specific conditions the glue will be exposed to and choose a glue that can withstand those conditions.
One of the most important factors to consider is moisture resistance. Pressure treated lumber is often used in outdoor environments where it will be exposed to moisture, rain, and humidity. Therefore, the glue used for pressure treated wood must be able to handle these conditions and remain strong and durable.
Another important consideration when selecting glue for pressure treated wood is end grain compatibility. End grain refers to the exposed, porous ends of the wood fibers. These areas are particularly difficult to glue, as they absorb glue quickly and can weaken the bond. Therefore, it is important to choose a glue that is specifically designed to handle end grain compatibility, such as resin glue or polyurethane glue.
By considering moisture resistance and end grain compatibility, one can choose the appropriate adhesive for pressure treated wood that will result in a strong and long-lasting bond.
Alternative Joining Methods
Alternative methods for joining pressure treated wood include the use of stainless steel fasteners, copper or vinyl flashing, and mechanical connectors. Stainless steel is a popular choice for manufacturers as it is highly resistant to corrosion and can withstand the harsh outdoor elements. Copper or vinyl flashing can also be used to protect against the corrosive effects of pressure treated lumber. Mechanical connectors, such as joist hangers and post bases, provide a strong and durable option for joining pressure treated wood.
Pocket hole joinery is another alternative method for joining pressure treated wood. This technique involves drilling a pocket hole at an angle into one piece of wood and joining it to another piece using a self-tapping screw. Pocket hole joinery is a fast and efficient method for joining wood, but it may not be as strong as other methods.
Biscuit joinery is another option that involves cutting a slot into two pieces of wood and inserting a biscuit-shaped piece of wood into the slot before gluing and clamping the pieces together. While biscuit joinery provides a strong joint, it requires specialized tools and may not be practical for larger projects.
Ultimately, the choice of joining method will depend on the specific project and the desired outcome.
