Quote from: Trainman203 on June 17, 2020, 10:43:52 AM
Can't help it Sid.  I was in the state fire marshal's office for years.  It was our job to worry about fire. We had no fire deaths in the commercial buildings we had jurisdiction over.

At my house I have working smoke detectors/alarms and a couple of residential fire extinguishers.

If I fire starts in the basement we have bigger problems then my trainset so...

Quote from: Len on June 16, 2020, 09:58:05 PM
Not all Liquid Nails products are safe to use on styrofoam. The one specifically intended for use on styrofoam is LN-704, Liquid Nails Interior Projects. Most home improvement stores carry it, or can order it if not in stock.

Len

thank you!

Quote from: WoundedBear on June 16, 2020, 06:50:43 PM
With a caulking gun and a tube of Liquid No Nails or other suitable adhesive. Spread the adhesive evenly with a wide putty knife before joining. Use weight while adhesive cures.

I would avoid spray adhesives for this job.

Sid

thanks! gonna assume you mean liquid nails.

how would one attach a 4x8 sheet of syrofoam to a 4x8 sheet of plywood?