preasure treat or encapsulate??

[thehermit]

Greetings,<br /><br />In deep on this project....here is the question.<br /><br />note the deck framing in this pic: the crossmember<br /><br /> http://f2.pg.photos.yahoo.com/ph/thehermitoncc/detail?.dir=/5c81&.dnm=18cf.jpg <br /><br />For the deck framing...Would you all use spruce 2x3s and cover them in epoxy resin or would presure treated lumber be better to create the crossmembers. Any comments/"e"pinions on the deck to framing ahdesive type are also welcome (5200,epoxy putty,resin,nothing). The last one I did was screws and poly adhesive but I dont know if epoxy would be stronger. I am preparing all the deck pieces inside right now as it is still very cold here in the NE and right now this old boat is filled with snow. <br /><br />Cheers<br />thehermit

 

[Craig W]

Re: preasure treat or encapsulate??

thehermit, my epinion on your situation would be to use non-pressure treated wood for the framing/stringers and fully encapsulate them with epoxy. Yes, it may cost more, however, if properly encapsulated it will be better protected (outlast) than the P/T wood.<br /><br />For putting the deck down, I'm personally using 4200 (because I have it, 5200 would be the "ultimate") to adhere the deck down to the stringers. I personally feel that the "little" bit of flexibility with the 4200 or 5200 is an advantage over epoxy putty/thickened epoxy in the flooring situation.<br /><br />However, prior to the deck going down, I will be pre-drilling the holes thru the deck into the stringers, pulling the deck back up and over drilling the holes in the stringers, and slightly on the deck (so the screw does not "engage" the deck). The deck panels will then be fully encapsulated ('cause I'm anal ) and the stringer holes will be filled with thickened epoxy. I will then be putting down the adhesive, laying the deck, re-drilling thru the holes thru the deck into the stringers, screwing the deck down, THEN sheathing the deck with cloth or mat (I haven't decided that yet). (geez I've got alot of work left )

 

[thehermit]

Re: preasure treat or encapsulate??

Craig,<br /><br />I have actually heard about this "back countersinking" before so the screw holds the wood down better. This is definately going the distance I dont know if I am up for this but I will keep it in mind. 5200 seems like it would be a heck of a lot easier than doing epoxy putty . Do you have to rough up the epoxy surface or will 5200 just do the job for you??

 

[Craig W]

Re: preasure treat or encapsulate??

thru experiences I've had with adhesives, you don't need to rough up "shiny" or smooth surfaces, just make sure the surface is clean, grease and dust free surface. I'd also make sure it is free of any blush if the surfaces were epoxy coated.<br /><br />if you haven't seen it yet, here is the 5200 Tech Data sheet

 

[crab bait]

Re: preasure treat or encapsulate??

i'd go with thicken epoxy.. cause everythin' is epoxy anyway/already.. keep in line with what you got... i guess 5200 will bond with epoxy,i guess.. but i do know epoxy will bond with epoxy..<br /><br />also,, why kill yourself.. lay down a good bed of thicken epoxy (handmade putty) an then pour a thin line of thin epoxy down on top of the puttied stringer.. <br /><br />honey on peanut butter..ain't nuthin' like it..<br /><br />lay down floorin'.. bore & countersink an drive home screws..<br /><br />the screw will take along some putty with it's threads an the rest of the putty will seal up everythin' anyway... <br /><br />plus the epoxy way,, you'll have hours to work before 'kick-off'.. no problem,, no hurry..that's worth everythin'..!!<br /><br />a job well done ...<br /><br />i'd go with south american mohogany instead of spruce.. <br /><br />spruce is good for boats in a lite weight situation..other then that,, it's not much advantage for boats..<br /><br />good mohog is everythin' for boats..<br /><br />or at least douglas fir..

 

[JasonJ]

Re: preasure treat or encapsulate??

When I layed my floor, I layed resin saturated strips of mat on top of the stringers (I glassed to the stringer tops when glassing in the stringers but left the tops exposed), then layed the ply. I then ran the stainless screws every six inches along all stringers, then sheathed in the floor. This way after all was said and done there is no exposed wood whatsoever.

 

[santa666]

Re: preasure treat or encapsulate??

TheHermit, <br /><br />Encapaulate, you'll be happier in the long run. <br /><br />Santa666

 

[Rhadley]

Re: preasure treat or encapsulate??

Jason-What does "sheathing" in the floors mean?<br /><br />And, wouldn't it be better to run the glass over the top of the stringers for better strength? You could still use the epoxy to connect the floor.

 

[outonbizniz2]

Re: preasure treat or encapsulate??

Rhadley... I think JasonJ is saying that he covered the entire floor with fiberglass mat/cloth and resin.

 

[thehermit]

Re: preasure treat or encapsulate??

FYI-the stringers are glassed in with (roven woving) heavy glass and I am cleaning and getting ready to re-coat with epoxy and add additional cloth here and there. After all the posts I am leaning twards encapsulate everything with epoxy resin/use 5200 between floor and frame/use 5200 on all crew holes.