Boat Hull thicknesses

had my boat in for some additional stuff to be added to it. Wanted to know the thickness on the hull sheets.

came back with 5mm transom and 4mm side and what most surprised me was 4mm kewl sheets. I dono if this sounds right to me or if it was even legal to have it this thick?


the boat is. 6.2 plate 7.3loa.  

Swompa's picture

Posts: 3828

Date Joined: 14/10/12

 Can't help but LOL at

Wed, 2019-09-25 12:45

 Can't help but LOL at Kewl...

4mm bottom sounds fine.

It is the best spot to have weight in the form of thicker plate but not necessary unless you plan to sit the boat on rocks.

quadfisher's picture

Posts: 1146

Date Joined: 28/09/10

Too thick?

Thu, 2019-09-26 10:16

 Didnt know it could be too thick , If I was getting a custom ali made around that size , Id ask for 5mm bottom , just great for beachings 

 and low down wieght .


Pressed or Plate

Alloy Boat 152w, 313w" sizes=" 229px) 100vw, 229px" />Construction hasn’t really changed much, with a choice of plate or pressed, although if anything there has been a tendency (accept in Australia) to go for heavier plate. While Quintrex continues to build its hulls in lighter 3mm alloy, which it says is all that is required due to its special construction technique, Kiwi boat builders seem to favour 4mm to 5mm bottom thickness and even one manufacturer goes as far as offering its 5.5m model with 6mm. Side thickness for most 5-6m boats by Kiwi manufacturers is usually 4mm, with a few at 3mm.



Posts: 790

Date Joined: 25/05/12

How do you find out ?  Im

Thu, 2019-09-26 18:50

How do you find out ?  Im interested in finding out for myself 

Swompa's picture

Posts: 3828

Date Joined: 14/10/12

Find a edge or it may be

Fri, 2019-09-27 13:59

Find a edge or it may be printed on the of the plate (on the inside under a deck) or drill a hole...

Posts: 790

Date Joined: 25/05/12

Cheers swampa ,really not

Sat, 2019-10-05 08:13

Cheers swampa ,

really not much to go on other than drilling don’t really wanna do that lol.

one of the same makes recently came up for sale had some info on it  

avatinni's picture

Posts: 141

Date Joined: 06/06/10

 I have just had a 4.6 open

Sat, 2019-10-05 22:32

 I have just had a 4.6 open built and it's got 5mm bottom & 4mm sides on it.