Re: F-hole re-enforcement
IMO, gauze is not required before during or after cutting the f-holes. When (not if) someone cracks the top by grabbing the mandolin with the thumb on the wing of the f-hole, the repair is much easier and better if there is no gauze there it hinder alignment, cleaning, gluing, clamping or any other procedure required to repair the crack.
If you search the term "gauze" and/or "gauzing" you can read some old threads on the topic.
(OK, so some mandolins manage to avoid the f-hole crack for many years, but the potential is always there.)
Re: F-hole re-enforcement
Thanks, I thought there might be something said on the topic but wasn't looking in the right place.
Re: F-hole re-enforcement
what is the best way to fix a FF hole crack? Do you glue a cleat in from the outside?
Re: F-hole re-enforcement
Quote:
Originally Posted by
kjbllc
what is the best way to fix a FF hole crack? Do you glue a cleat in from the outside?
Only of necessary. If it is a new crack that is tight and with good alignment, it can be glued with no cleat, either with CA or with hot hide glue. If it is an old, dirty, open and/or misaligned crack a cleat may have to be used. Yes, glued in and clamped from the outside working through the f-hole.
That is why I do not like gauze inside of the f-hole. It makes misalignment of the crack more likely and more difficult to correct and it makes gluing a cleat securely to the inside nearly impossible.
Re: F-hole re-enforcement
If you really feelthe need to add the reinforcement do it with gauze and hide glue. That can be removed relatively easily with warm water. I once repaired Gibson F-9 and it had a piece of cloth attached with ton of Titebond. I carved it away with thumbplane - one pass removed just the cloth, the second pass removed much of the glue underneath...
Re: F-hole re-enforcement
The gauzing on f-holes on the original F5s, H5s, and L5s - as well as on violin-family instruments - was not about strengthening the f-holes but instead to add stiffness to the edges of the wood around the f-holes to reduce the propensity for he unsupported wood to damp (i.e., wick off energy). Very similar reason for the use of ebony fretboard extenders rather than using maple or mahogany ones.
RR
Re: F-hole re-enforcement
I have used gauze with Titebond from my very first, following Siminoffs' guide.. With my second build, I sanded most of the glue and gauze off after reading about how unnecessary the reinforcement was.. I thus got my only failure, with a split from the F hole on the treble side all the way down to the binding.. That taught me how to replace a top very early on... In over 50 builds, I've reinforced every one without one problem.. It does add a lot of extra steps. but so does the scroll on an F style as apposed to the A style....... Keith
Re: F-hole re-enforcement
Re: F-hole re-enforcement
Great responses from some great builders. Thank you everyone
Re: F-hole re-enforcement
I agree do it with Hide Glue. I have made only mandolins without gauze around the F holes. I have never had a crack develop.