Stringer question

[pete44]

Getting ready to "peanut butter" my stringers in...Will the peanut butter bond better to "untreated" wood?...Otherwords can I coat and glass my stringers before installing them to hull?

Thanks,Pete

 

[andgott]

Re: Stringer question

You are asking if thickened resin will stick to treated lumber?

Yes- It will. Make sure the lumber is DRY though- Most of the treated stuff you get at lumber yards is pretty damp. Leave it inside for as long as you can- I like to dry mine for a few months... I stick it in my basement, which is dry and has a dehumidifier.

You can glass the stringers outside the boat and tab them in, or glass them in the boat... I glassed mine in the boat- It saves some time and materials since you can encase them and 'tab' them in at the same time...

 

[Robert4Winns]

Re: Stringer question

By "treated" do you mean coated with resin? If so you can do that before tabbing them in, you just need to sand them so the next coat of resin and glass has a good surface to stick to if the resin has cured.

 

[pete44]

Re: Stringer question

By "treated" do you mean coated with resin? If so you can do that before tabbing them in, you just need to sand them so the next coat of resin and glass has a good surface to stick to if the resin has cured.

Thanks.I would coat wood with resin and glass before mounting them..And it is untreated birch plywood..I purchased my resin at US Composites and it is "unwaxed" therefore it would not require sanding??? (Does that sound right?)

Pete

 

[Robert4Winns]

Re: Stringer question

There is really no reason to fiberglass them before installing them. You want the glass to bridge the joint between the stringer and the hull. I don't use poly resin so I don't know for sure, but I believe that since you are using unwaxed resin it should remain tacky on the stringers and will not need sanding, but that may be a reason not to apply resin first; you will have to be handling them when the resin is not fully cured.

 

[pete44]

Re: Stringer question

There is really no reason to fiberglass them before installing them. You want the glass to bridge the joint between the stringer and the hull. I don't use poly resin so I don't know for sure, but I believe that since you are using unwaxed resin it should remain tacky on the stringers and will not need sanding, but that may be a reason not to apply resin first; you will have to be handling them when the resin is not fully cured.

Agreed..It would be alot easier to prep the wood first out of the boat (especially with a deep v hull) then install...My other concern is moisture penetration on "untreated wood" being installed to hull..I am talking about the bottom edge of stringer...Thoughts?

Thanks,Pete

 

[lrcustom]

Re: Stringer question

Pete,
I also argued this issue myself wound up deciding to resin the bottom edge of the stringers. I set them in PL worked nice was able to fillet the PL after the stringers were set with more PL and a plastic spoon. My thought was that the peanut butter might set up to fast for me as I was working slow. But like you the bottom of the stringer being sealed seemed very important in view of what was removed from the boat. The last thing I want is to redo this work because I didn't do it good the first time.

 

[ghamby]

Re: Stringer question

Whenever possible I like to laminate prior to installation. Takes all of the mystery
out of "Did I get the hidden parts covered"? Remember to allow for the thickness
of the glass and resin. GH