If foam alone is good enough for walls..

[eaglesdare]

I can't remember how many gallons I used. But I know I used 5 or more. I also used more full strength glue than others. My initial canvas on glue is using full strength, not watered down glue. On top of the canvas I used watered down. I also think I used 2parts glue to 1 part water.

[GPW]

Eagle , you were just “making sure” !!!
I used a gallon and a half of T2 for my whole trailer , but thinned it ~ 50/50 and only used it to adhere the canvas to the foam , and was all paint from there on ..

[swampjeep]

How many gallons of titebond have some of you had to use for your whole tear? I used 1.5 gallons just for the bottom.

I believe you are the only one putting the TB and canvas over wood, the wood is probably absorbing a lot of your glue

[GPW]

Just FYI , I used the black Nasty stuff on the bottom of mine ... It’s pretty Thrifty...

[Irving]

Just FYI , I used the black Nasty stuff on the bottom of mine ... It’s pretty Thrifty...

What product is that? Some kind of Henrys? I've canvased the bottom and I'm about to spray rustoleum truck bed liner rattle cans over the canvas.

[GPW]

Irv , I can’t remember what brand it was but it was purchased at the HD and was Inexpensive... As I remember it was a green label ... Kind of messy to apply , but sure works good ...

[atahoekid]

As an alternative to the thick black goo, there is a fence post "paint" that they sell at Tractor Supply and Hardware. It goes on pretty much like a paint but it seems to have the appearance of a thinned asphalt. It is water clean up but I'd wear gloves anyway and wear something you don't mind ruining. I put that on the underside of my trailer and 1 gallon was enough to do a double coat of the entire underside of a 7' x 11' floor and wheel wells and I still have some left. I did a scrap piece and it actually penetrates the wood a bit and leaves a solid coat on top. Not too messy! I like the results.

[Irving]

What is the best glue to use for joining foam to foam and for joining foam to wood? Gorilla glue work well? Any other good options? Does titebond work for foam to wood?

[KCStudly]

GG works great once you learn the right ratio of glue and moisture. Even though the GG will expand, tight fitting joints are still important for good strength. I've been using plastic coated freezer paper (Reynolds brand from the kitchen section at Wallie World) as a release film to keep the GG from sticking where I don't want it to. For the most part it peels right off cleanly (I did have some trouble with it sticking early on when I was using too much water).

I did an experiment with TB2 and foam face to face and it worked quite well, but that was a small test sample and I did not try it with larger panels or butt joints.

Wood to wood I am using TB2 with good results.

[GPW]

Just FYI ... our test with the Glidden Gripper as an adhesive worked well , even on butt joints ... Like the TB2 , it’s not gap filling like the Gorilla Glue of spray foam ...both of which are messy , but workable ... Depends what you need ...if you take the time to make every part fit perfectly (like KC does ) then you don’t need a gap filling glue ... But if you’re like the rest of us and not so talented or careful , then the gap filling glues makes everything OK... TB2 seems fine for joining foam to wood . For quick joining small pieces , a hot glue gun works well , if the temp is set to only SLIGHTLY melt the foam ...too cold and it won’t stick , too Hot and you melt more than you want to ..
Actually , although not recommended , you could use library paste , knox gelatin , boiled fish skins, double stick tape .... whatever, because as someone mentioned , the Outer skin/sock ultimately holds everything together as a unit ...

[KCStudly]

...if you take the time to make every part fit perfectly (like KC does )

ROFLMAO

...then you don’t need a gap filling glue

Thanks for the great, tho slightly delusional complement, Geep-dub. If only it were true! I spend the time where I need to, and try to do good everywhere else, but there have been many times where I have relied on the GG to (sometimes) fill in slight gaps. It doesn't always kick as hard as you might want it to (sometimes leaving small void areas... at least when the climate has been dry) so it is still better to have a good fit over most of non-critical joints. Where I did not get full extrusion or had some void areas I just didn't worry about it too much because I figure 90/ct of the part in question was solid and, if you plan it well, the strength comes from the sum of the structure.

By restricting the expansion (tight fit and good clamping and/or weight) the bubbles in the GG foam stay tight and close together, providing much more structure to the joint. If you have some gaps, lay it on a little thicker and really give it a good spritz of water, it will really kick and expand out, but each bubble will be bigger and there will be less structure in the joint.

More smaller cell walls closer together = stronger joint.
Fewer cell walls farther apart = weaker joint.

For larger jobs that need a true filling foam I would probably suggest Great-shh-stuff. I haven't found a need for it yet, but may fill some of the gaps in my foam filler panels in my doors and bulkhead wall.

[GPW]

Delusional ... perhaps ? ... The wooden trailer folks have been thinking that about me since I first proposed an all foam trailer ... so I can accept that !!!

But it seems to me your trailer has been the most “engineered" so far , with an attention to detail not seen anywhere else ... JMHO ... FWIW ...

[bonnie]

LAR (Looks about right) wins again.

[KCStudly]

Perhaps I was too harsh in my attempt at humor while trying to show some humility.

I meant to say, "thank you for the most gracious of compliments, sir".

I am happy with the way TPCE is turning out, but it does have its warts, and I have had to apply "wart remover" here and there a few times to fix some things. Not everything is 100/ct all of the time, but it takes a lot of time and effort trying to get close, even 95/ct of the time.

Thanks again for the exaltation.

[bonnie]

You made me laugh with that one.