WETT-Certified Inspections & 5-Year Written Guarantees Proudly serving Peterborough, Muskoka and the Kawartha Lakes areas for over 75 years, R.L. Johnston Masonry Inc. is now in our fifth generation of expert masons. Specializing in residential and commercial stone and concrete masonry work, we are Wood Energy Technology Transfer Inc. (WETT) certified inspectors offering five-year written guarantees on all workmanship. Entrust Us with All Your Chimney Maintenance Needs Whether you need your chimney cleaned or repaired, you can entrust the job to a reputable local company featuring a knowledgeable staff who is not only experienced in cleaning and maintaining chimneys, but who have designed and built them as well. We also provide repairs on leaky foundations at competitive prices and install drainage systems. We can even help process insurance claims for your convenience.