AMBTRA, Inc. David Groff

Professional wallcovering installer for 23 years. Author of The Encyclopedia of Wallpapering and The Complete Guide to Wallpapering. Author of original NGPP National Certification Examination. David has been the International Belbien Technical Consultant for Belbien since 1990 for CI Kasei. David was hired by AMBTRA as the Belbien Director and the Vice President of Operations in 1995.