Glue thickness and Purfling/Binding channel allowance

[Andy C]

I'm going to have:
BWB (.04 wide), Zipflex Abalone inlay (.079 wide) , then BWB (.04 wide) then the outside Binding (.062 wide)
Using StewMac Bind-all or similar
.04
.079
.04
.062
______
.221

My Question is :
Should I make the width a little more deep to allow for glue between the purflings and the Binding ???
Thanks in advance,
Abdy

[ken cierp]

Maybe --- ??? Always make a test block to check your combination depths and glue ups. Remember that you want to sand/scrape the sides flush to the bindings not the other way around which would/could result in an inconsistent thickness.

[Kevin in California]

Don't we usually consider about .005" for glue thickness, which means allow that much depth for each surface that will get glue, such as between each layer of purfling, binding, and the inside edge of the channel?

I've got a scheme on the guitar I'm building; binding is .085", maple purfling is .035" and EIR purfling is .022". This totals .142 and I figure a .150" depth on the purfling channel should be just about perfect, as I like to scrape a little bit of the bindings down flush with the sides. I start out with very flat and level sides before cutting the channels.