Aventura 33 Review

[axiomoixa]

Originally Posted by 44'cruisingcat

Because it's the cheapest.

Vinylester isn't much more expensive and has far better properties. IMO a builder using polyester instead of vinylester would have to be considered questionable as regards quality of product. Particularly in a multihull where strength of secondary bonds is very important, and polyester performs so poorly.

Do you happen to know who uses Vinylester?
As far as I know, all most of the mainstream brands like Lagoon and FP use polyester.

[axiomoixa]

When they say "monolithic polyester", is that automatically polyester resin with glass fiber? Or is that literally just polyester?

[mark_morwood]

Originally Posted by axiomoixa

When they say "monolithic polyester", is that automatically polyester resin with glass fiber? Or is that literally just polyester?

Polyester doesn't work for boats without some form of reinforcement, the most common being glass fibre. Roughly speaking, the polyester resin is just there to support and bind the fiberglass strands which provide the strength (at least in tension). I suspect in this case "monolithic" = "uncored". So it is probably solid glass polyester laminate below the waterline and PVC foam cored polyester glass laminate above the waterline.

[yeloya]

Just to make simplier, it goes from the cheapest to the more expensive with the rank;
monophatalic polyesters, isophatalic poliesters, vinylesters, epoxy.
As you go from left to right, the prices goes up, the density goes down while the strength increases and the risk for osmosis decreases.
Vinylester is used on boats like Outremer, Catana, etc. All other production boats are isophatalic polyester. FP has for a while used orthophatalic and faced with huge osmosis problems. As far as I know this one is not used by any brand anymore.






Cheers


Yeloya