I very highly recommend Frank Haverkate and his indoor environmental assessment. I was having multiple allergy symptoms, made worse in my own home, so I hired Frank Haverkate to do a complete environmental assessment of my home. Frank was extremely professional, accurate, and thorough in his evaluations, and in his remediation recommendations. Frank found I had a severe mould spore problem in my old home. Once the remediator did EVERYTHING that Frank recommended to resolve the mould, my home air re-tested as healthy and clean. My health improved dramatically, and chronic allergies are now gone. I highly recommend Frank Haverkate and associates.