<img class="lazy" height="1" width="1" style="display:none" src="data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%201%201'%3E%3C/svg%3E" data-src="https://www.facebook.com/tr?id=376816859356052&amp;ev=PageView&amp;noscript=1">
 In Shop Blog, Techniques

We may receive a commission when you use our affiliate links. However, this does not impact our recommendations.

A thickness tester makes plywood joinery easy, accurate and predictable.

One of the great questions every woodworker asks is why wood you buy from a home center is never its stated thickness. You already know that 2 x 4’s are actually 1-1/2” x 3-1/2”. At least you can depend on lengths being accurate. Far worse is plywood. 3/4” plywood is only in the range of 3/4”. Manufacturing tolerances are supposed to be: plus/minus 0.8 mm (1/32 inch) for some soft plywoods and plus/minus 0.4 mm (1/64 inch) for utility grade plywoods, to an entirely different set of tolerances for hardwood plywoods: plus 0.0 mm/minus 1.2 mm (3/64 inch).

Besides thickness standards being confusing, there are added variables of temperature, moisture content and significant manufacturing variations from batch to batch.

The result of all this is that a woodworker can’t depend on any stated plywood thickness. If plywood thickness is a critical dimension to your project, you always have to measure it and test it.


 

By registering, I acknowledge and agree to Active Interest Media's (AIM) Terms of Service and to AIM's use of my contact information to communicate with me about AIM, its brands or its third-party partners' products, services, events and research opportunities. AIM's use of the information I provide will be consistent with the AIM Privacy Policy.


Start typing and press Enter to search