Dear hvac,
We are sorry to read about your unsatisfactory experience.
These are several reasons an applicator may not obtain the desired theoretical yield from a Foam Kit 15.
1. We do not recommend a Foam Kit 15 for air sealing and insulating a large void such as described. There is not enough control and the dispensing is very dynamic.
2. First time users find it difficult to apply spray foam in a smooth even application. Spray Foam is almost always over applied. This reduces total expansion and square foot coverage. Applying spray foam too thick prevents maximum expansion.
We would ask that in the event that you ever feel that Touch 'n Foam is not dispensing as desired, please call our Technical Service department while you are on the jobsite for immediate support.
Thank you!