Making a Workbench – Part 3: PVA Glue
In the third part of this workbench build I get around to gluing up the leg frames. I thought I’d take a moment to mention a couple of details about this phase of the project. Throughout this build I’ve been using bog standard PVA (polyvinyl acetate) wood glue. I’ve always gotten along really well with PVA glue, I know it’s limits, know the timbers that don’t react to well to it and can’t really recall any problems worth mentioning. For a softwood bench build I don’t think I’d use anything else. I’m sure that most woodworkers would have similar experiences.
In recent years animal based glues have been getting more attention thanks to both what seems a revival of traditional methods combined with the far reaching influence of the internet. I personally think that’s a great thing. I’ve been experimenting with hot animal glue recently and I have a small bottle of ready-made hide glue to try. Results have been good and I can imagine using animal glue much more.
However, for a bench build like mine I still prefer PVA. I generally use waterproof PVA on everything. I think that is because we make a lot of external joinery, windows, doors and the like in our workshop. Having non-waterproof PVA hanging about could lead to trouble and creates the opportunity to use internal grade glue externally. By all means, you could use hide glue on your bench build, but personally I’ll “stick” with PVA…
The next thing is squareness! When gluing up the leg frames getting them nice and square is really important. Squareness is something I’m pretty fussy about since so much of what we make in our workshop are doors or windows fitting into frames. One element being out of square causes a big problem for the entire build. The solution to this problem is easy.
Number one, I don’t allow the use of a tape measure for checking squareness. They are floppy and prone to error for this task. I also don’t allow the use of a ruler. The ruler has the same problem as a tape, not the floppy issue, but it’s possible to read a measurement wrong. My favorite method is a screw in a batten. It is so simple to check diagonals this way, simply aligning the screw into the corner of the frame and applying a pencil tick allows a simple and very accurate way of verifying the squareness. I highly recommend it! Hope you enjoy Part 3.
— Graham Haydon
Do you have questions about workbench building? Check out Workbenches Revised Edition: From Design & Theory to Construction & Use by Christopher Schwarz.