You have glass bonded to divinicell. It's just a small hole so it's not important to the overall structural integrity but if it were a big panel that would seem to be a questionable practice.
Could you explain what you mean by this? How should this have been done in your opinion? I need to repair some larger holes where the foam core has been weakened and needs a deep repair. Many thanks.
TIAD If possible you want to replace similar materials for similar materials. If you look on the foam on the inside of the board you will see different types of foam used. The technique I have shown works well for small repairs. However for bigger repairs you should look at replacing the high density foam on top. Organ Farm please feel free to add any input, this video aim is to help people out, I am sure others would love to learn from your experience.
GetWindsurfing Many thanks for your reply, much appreciated. I have a couple of holes, about an inch deep both, in a Fanatic Shark HRS board. I've cut away the damaged foam and fibreglass, I can't see that the foam is in different layers, it looks pretty much like any polystyrene foam at first glance. But that is my concern also, that I need to replace the foam with something which won't give too little or too much. Any advice gratefully received.
GetWindsurfing I'm no expert but it is, as you say, good practice to replace all the layers with similar stuff. The inner glass is a tension membrane so it should be lapped and bonded at the edges to the glass layer. The divinycell doesn't work in tension so it doesn't need to be bonded at the edges to make a continuous skin. It just has to be a snug fit at the edges and bonded to the face of the glass. The outer layer (glass or carbon, whatever) is again a tensile layer so it should be lapped and bonded at the edges to the outer layer and to the face of the divinycell under it to make a continuous skin. It seems to be common practice to just grind a broad bevel and treat all three layers as a simple scarf but this provides uncertain layer to layer joints and compromises the structural continuity of the different skins. It is structurally better to build a decent (ie fine but well lapped) bond at both the inner layer and the outer layer. I have never done it so I can give no practical advice.
Organ Farm you usually find with SMALL repairs that if you feather the edges that you have enough surface are for the glass to bond to then the repair will be more than sufficient, However replacing materials as much as you can will give you the best results. For BIG repairs carbon helps add lots of extra stiffness compared to glass. A lot of learning to repair boards comes from experience and lots of trial and error. Be confident its not too hard a skill to learn and also keep in mind what area of the board you are repairing with a mind to the stresses affecting that area. When I started out repairing boards this website link www.boardlady.com was a fantastic reference, and still is. Thanks for the input.
Great video Phil. Any particular kind of spray paint you should use?
Thanks Ash. I try to make sure the spray paint is similar to the board. Gloss for gloss and Matte for matte
Superb!
thx, nice video
nice tutorial man, now how to we fix the climate crises?
You have glass bonded to divinicell. It's just a small hole so it's not important to the overall structural integrity but if it were a big panel that would seem to be a questionable practice.
Could you explain what you mean by this? How should this have been done in your opinion? I need to repair some larger holes where the foam core has been weakened and needs a deep repair. Many thanks.
TIAD If possible you want to replace similar materials for similar materials. If you look on the foam on the inside of the board you will see different types of foam used. The technique I have shown works well for small repairs. However for bigger repairs you should look at replacing the high density foam on top. Organ Farm please feel free to add any input, this video aim is to help people out, I am sure others would love to learn from your experience.
GetWindsurfing Many thanks for your reply, much appreciated. I have a couple of holes, about an inch deep both, in a Fanatic Shark HRS board. I've cut away the damaged foam and fibreglass, I can't see that the foam is in different layers, it looks pretty much like any polystyrene foam at first glance. But that is my concern also, that I need to replace the foam with something which won't give too little or too much. Any advice gratefully received.
GetWindsurfing
I'm no expert but it is, as you say, good practice to replace all the layers with similar stuff. The inner glass is a tension membrane so it should be lapped and bonded at the edges to the glass layer. The divinycell doesn't work in tension so it doesn't need to be bonded at the edges to make a continuous skin. It just has to be a snug fit at the edges and bonded to the face of the glass. The outer layer (glass or carbon, whatever) is again a tensile layer so it should be lapped and bonded at the edges to the outer layer and to the face of the divinycell under it to make a continuous skin.
It seems to be common practice to just grind a broad bevel and treat all three layers as a simple scarf but this provides uncertain layer to layer joints and compromises the structural continuity of the different skins. It is structurally better to build a decent (ie fine but well lapped) bond at both the inner layer and the outer layer. I have never done it so I can give no practical advice.
Organ Farm you usually find with SMALL repairs that if you feather the edges that you have enough surface are for the glass to bond to then the repair will be more than sufficient, However replacing materials as much as you can will give you the best results. For BIG repairs carbon helps add lots of extra stiffness compared to glass.
A lot of learning to repair boards comes from experience and lots of trial and error. Be confident its not too hard a skill to learn and also keep in mind what area of the board you are repairing with a mind to the stresses affecting that area.
When I started out repairing boards this website link www.boardlady.com was a fantastic reference, and still is.
Thanks for the input.