1/8" vs. 1/4" v-notch trowel

hello, i'm installing bruce 3/8 x 3" hardwood on concrete sub, and I have to glue it. I'm butting it up to existing floor (same type) and I wanted to know if I can use a 1/8" v-notch trowel
because the height of the seam between the 2 floors is the same with the new flooring just sitting on subfloor. Will the 1/8 give me enough adhesion? By the way, the older floor had a peel and stick application, and my in laws didnt specify when ordering, so now i gotta glue it. Anyway, if this isn't completely confusing, let me know what You guys think. This will be my first glue down floor, I've done several floating. Thanks!

 

First off you need to flatten the substrate to within 1/8" in 6 feet, or your going to have hollow areas.

Then use the recommended 3/16 notch trowel. The adhesive will squish down, just stand on the board after placement.

Don't even think about using a carpet glue 1/8" trowel!!!!!!!!!!

 

thanks, dude.....i got the right trowel and the floor turned out great!