Sheathing - Fiberglass, Biaxial, Carbon & Kevlar

[YNOT]

What sheathing do you use for a 25' Strip-Planked hull?

Fiberglass, Dynel, Kevlar, Kevlar Twill, Biaxial & Carbon Fiber?

With all the choices nowadays for sheathing Strip-Planked hulls, which one do you use?

Do you use Kevlar on the outside and Biaxal on the inside?

I would like to hear your views.

Thanks

[G. Schollmeier]

First choice is what the plans call for. I don't think kevlar or carbon fiber would ever be called for. More help requires more information, type of boat, how it will be used, some stripped plank construction needs no sheathing other then paint.

[JimConlin]

Beyond commonplace small boats, it's probably wise to start with a scantling rule, such as those in Dave Gerr's The Elements of Boat Strength.

Miraculously, I just found it on Google Books (http://books.google.com/books?id=y2GT5JyVrzAC&dq=gerr+boat+strength&printsec=frontcover&source=bl&ots=wvKQKZw7ny&sig=fLzI9NnLxnkGOQtsUlJPh4fVCvI&hl=en&ei=WLXCSZiaLaCImQfnvLDYCw&sa=X&oi=book_result&resnum=1&ct=result#PPP1,M1)

Depending on the requirements (and budget), kevlar and carbon could be quite useful. The hull of BBY's Lena was mostly cedar strips and carbon uni.

[Gary E]

What sheathing do you use for a 25' Strip-Planked hull?

Fiberglass, Dynel, Kevlar, Kevlar Twill, Biaxial & Carbon Fiber?

With all the choices nowadays for sheathing Strip-Planked hulls, which one do you use?

Do you use Kevlar on the outside and Biaxal on the inside?

I would like to hear your views.

Thanks

I think you need to narrow your selection to a specific design, and then look into the North Carolina Builders that actually build this way.

http://www.yachtworld.com/byp/categories/BoatBuildersManufacturers/BoatBuilders_NC.html.en

[John Meachen]

Under no circumstances would I have a kevlar laminate on the outside of a sheathed hull.It degrades badly in sunlight and loses a lot of strength.It also goes very fuzzy if you sand it.The puncture resistance may be impressive,but for my part it would be better with a glass laminate over it to remove it from the possibility of breaking through during finishing.Carbon is expensive,even in these challenging times,and it makes a mess when you sand it.It also has very limited drape formability.Biaxial glass is great for strength if you can obtain it in a weight that makes sense for your boat.Otherwise you are at risk of building a form for a glass boat.My preference would be a glass cloth,perhaps a twill weave.