[Question] Getting ready to lay down balsa floors but have a few ?
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Getting ready to lay down balsa floors but have a few ?

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    Default Getting ready to lay down balsa floors but have a few ?

    I am almost ready to lay down the balsa on my southwind bottom. I have purchased baltek 3/8 end grain balsa with scrim backing. I have been trimming the pieces to fit with the scrim side up, like I was told by the dealer. Only issue I have is that the scrim will be visible? How much cloth should I be covering the balsa with after it is bonded to the hull?
    Thanks in advance for any help and or advice!

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    First the Scrim can be sanded off after you have applied it to the hull , second - what type of resin are you going to be using because your choice of resin depends of the type of fabric you should use , third - what look are you trying to acheive , and are you planning on doing any flow coating if you can ?

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    I am using us composites thin epoxy resin with filler additive to bond the balsa to the hull along with a layer of mat. Then on top I will be using west systems ultra clear 105/207 resin.

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    Quote Originally Posted by bbfsouthwind View Post
    I am using us composites thin epoxy resin with filler additive to bond the balsa to the hull along with a layer of mat. Then on top I will be using west systems ultra clear 105/207 resin.
    When you say mat do you mean CSM ( chop strand mat ) and do you know that West system Ultra Clear will yellow over a period of time considering that West system recomends using a UV-filtering varnish on top of the 207 to help provide a longer lasting finish .

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    Quote Originally Posted by bbfsouthwind View Post
    Then on top I will be using west systems ultra clear 105/207 resin.
    No fabric ?

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    Yes I planned to use a finishing cloth, and sanding the floors after the final resin application and then will apply clear coat for the uv protection.

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    And yes I meant chopped strand mat, is there a better alternative?

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    Quote Originally Posted by bbfsouthwind View Post
    And yes I meant chopped strand mat, is there a better alternative?
    Chopped Strand Mat , is not Recommended ( compatible ) To be used with epoxy resins because these mat's have a binder designed for polyester resins that are often used with epoxy resins with satisfactory results ,although the binder can ,and may cause clouding and prevent thorough wet out. bb , your call .

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    Oh ok, I have experienced that. What should I use between the balsa and hull?

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    Should i use a core mat between the balsa and hull or just resin with some west systems adhesive filler?

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    Quote Originally Posted by bbfsouthwind View Post
    Should i use a core mat between the balsa and hull or just resin with some west systems adhesive filler?
    Please do not use Core mat and without being rude my next question is .....where are you getting your information from , and what materials you should be using ,and could you please post up some pics to give all a better idea on just where you are at , and how much core have you laid down using CSM because not only is that a bad choice on what to use it takes twice the resin to wet out because once again it is designed for Polyester resins . Just curious what other fabrics do you possibly have avaliabile and to tell you the truth if i was you....... i would go with 17 oz Bi -Ax -( two layer's ) which is somewhat old school , and something (old habit ) that i have done for years now because i have always believed in a little more beef .........which is always better , and just my opinion or 2 cent's .
    Last edited by OFFSHORE GINGER; 03-06-2013 at 05:09 PM.

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    I have not laid down any core using csm, I'm not getting info from anywhere that's why I am asking here. Never done this before, I have the hull nice and flat and straight right now. I am just waiting for some advice before I continue with this.
    Thanks

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    First off this is a practice and something that was done When i worked at Skater and for me an old habit to break because Beef ( fabric ) is......... and always will be a concern ,and when ever i replace core these are the steps i take provideing your surface is already Prepped ( excample - large areas ) lay down two layers of fabric ( glass) depending on the size of the repair let cure and prep , mix a putty using Cabosil and resin ( mayonnaise -consistency ) spreading it over the back side of the core which will help bond the core to the hull filling all voids and gaps , apply the core to the hull pressing it firmly into postion , and hopefully trying to get everything ( core ) flat as possible with the scrim side up removeing excess putty that may squeeze out around the joints or gaps ( very inportant ) before it cures . Just a quick mention and that is if you decide to get material or fabric to do this repair make sure it is free of any CSM chop strand mat such as 1708 considering you are going to be using Epoxy , and once again might i suggest using DB #170-17 oz Biaxial-no mat - scroll down seeing that you are already using Specialty Fabrics or materials from us composites , and if by chance you decide you do not want to put down two layers of cloth or fabric at least lay one . Good luck , and i hope this might be of some help .
    Last edited by OFFSHORE GINGER; 03-07-2013 at 07:22 AM.

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    Yes you have been a great help. I will go ahead and calculate my area and get some biaxial ordered without the mat backing. I will chime back in if I have anymore questions, thanks!

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