I’m pricing out a run of bookshelves for a client and I see Home Depot sells this type of ply. It’s formaldehyde free and interestingly it’s cheaper than the conventionally made sheets. What I would like to know is functionally is this any different than the formaldehyde based ply? Have you used it? Is it better not to use it? Thanks
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Replies
I stopped buying plywood at home depot a long time ago. Every sheet I bought was utter crap. I had sheets that split into separate lamination as I was cutting it. I just won't buy from them again.
Since it's been a while for you, I can pass on that I've been happy with Home Depot's Sandeply plywood. I'm not sure if it's quite the quality for interior cabinets, but I've been quite pleased using it for workshop grade projects such as cabinets for my router table, benchtop mortiser and sharpening station. No significant gaps or defects and it's held up well for at least 3 years. And it is very reasonably priced.
I too have had problems with Pure Bond plywood. I purchased 5 sheets of cabinet grade maple with a sanded poplar core, from a supplier to commercial shops (not Home Depot) and every sheet had sections that were delaminated. I should have returned it, but we had already cut most of it up when we noticed the problem, so we blew PVA glue into the delaminated areas with compressed air, clamped it, and moved on with the job. IMO Pure Bond has quality control issues.
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Formaldehyde outgassing is associated with urea formaldehyde glue. This is used in interior decorative plywood. It does not pass the durability tests required for exterior structural plywood which is made with phenolic adhesives which do not outgas. I've seen phenolic bonded veneer core decorative plywood. It's expensive and high quality, usually limited to industrial distribution. At one time I had to source "formaldehyde free" plywood for the head and seat boards in bay windows. I found lumber core decorative plywood made with catalyzed PVA glue. This is not structural plywood. Code does not allow in in floors or walls. "Formaldehyde free" was a legal rather than a chemical description--an exemption written into the building codes. The PVA glues require a little formaldehyde for shelf stability, but it doesn't enter into the catalyzation.