Moisture regulation & secure tile bonding
Lime torching, dialecticaly often called Parging, is particularly valued for its dual benefits: superior moisture regulation and excellent bonding for roof tiles and slates. Unlike impervious more modern materials, lime allows roofs to release internally created moisture to permeate out, facilitating the natural evaporation of moisture. This prevents condensation build-up and decay within the roof structure. Additionally, the lime mortar securely bonds tiles and slates, enhancing the roof's stability and resistance to wind uplift, crucial for the integrity of historic buildings.
Discover the enduring legacy of lime torching, a traditional technique that protected roofs for centuries before modern materials existed. Learn how this vital practice contributes to the longevity and health of period and listed buildings.
Centuries before roofing felt
Long before the advent of modern roofing membranes and synthetic felts were originally devised in the 1920's which were predominantly bituminous based, but often included asbestos strands for added strength (ASBESTOS), lime torching served as the primary method for sealing and protecting roof structures. This ingenious application of lime mortar, rich in free lime content to ensure good capillarity, to the underside of roof tiles or slates provided an essential barrier against the elements. It’s a testament to the wisdom of our ancestors in preserving their homes and structures for generations.
Understanding internal moisture
For anyone seriously involved with period and listed buildings, managing internal moisture is paramount. While lime torching provides an excellent exterior barrier, understanding how moisture behaves within your property is key to its long-term health. Good ventilation and appropriate internal finishes work in harmony with traditional roofing techniques like torching to create a healthy, "breathable" environment.
Explore our resources more, and stop thinking moisture only comes from rain; dont forget that moisture rises too!
Check out our Vid below, and our insulating lime page HERE.