It has taken years to build up the courage to face our basement wall. Lime mortar is still popular for use on older Victorian style or brick homes that were made many years ago. As for the mortar the lime content should not be important for the lifetime, but you can add a bit for better workability. To reiterate, cement and soft stone/brick do not mix!. Many old buildings were layed using what they called "Lime Mortar" - it contained little if any cement. The mix, to begin with, should appear rather dry but as mixing time increases the mortar will become much 'fattier'. When I first looked into the world of lime mortar I was somewhat put off. Lime mortar is a type of mortar mix that was very popular with skilled artisans and masons during the late 1800s and 1900s. Generally there should be no or very little lime in a stone wall. The beauty of lime mortar is that it allows the stones to “breathe” and “flex”. It's true that when a wall is hosed down or wetted beforethe lime mortar sets (maybe 24 hours or so), white streaks will run down the wall. Use appropriate lime mortar, which should be matched to the old pointing if possible. It also did not weather well. Lime mortars for lime pointing are generally softer and more porous compared to mixes using cement therefore allowing moisture to evaporate from the joints more freely. You guys do realize that mortar is a mix of lime, Portland Cement and sand. We take out the crumbling rotting mortar and put new in. Available in 12 stock colors and 3 different grades: Coarse(G) to be used for joints over 3/8″ Fine (F) to be used for joints between 1/4”-3/8” Hot mixed mortar is best, especially in damp walls, but be careful of health and safety. Hydraulic Lime for Mortar for Stone Brick and Block Masonry. Ecologic™ Mortar Product Description: Mix and Go lime mortar based on NHL 3.5 pre-blended with sand (contains no Ordinary Portland Cement (OPC)) to be used for repointing and laying stone and brick. If you’ve ever seen a brick wall where the faces of many of the bricks are blown clear-off, you’ll understand the effect. The new mortar should consist of 1 part of portland cement and 2-3 parts of sand. The process of fixing crumbling mortar in a stone wall is quite tedious, but it’s also pretty simple. We determine this by what type of stone the wall is made of and the condition the stone is in. The type of mortar used to repair the crumbling joints is the most important factor. Press the mix well into the joints, knock back and then tend the mortar as it goes off. Bricks of the 19th century through to even the 1950’s are more porous than today’s bricks. Published by Donhead ISBN 1873394640. Finish with an open texture, set back from the face and not covering the masonry units. Stones are naturally porous as well. The O and K type mortars have a higher amount of lime in the mix … Years of sweeping up dust and bits of stone as the wall sheds. Lime mortar takes much longer to cure than does portland cement. Years of research on how to make quicklime into lime putty and what ratio of lime putty to mix with sand to form the appropriate mortar for a row house built in 1832. But a weak acid wash, immediately followed by clean water after the mortar has set will easily clean it up. This can help to lower moisture levels in the wall and reduce the build up of soluble salts in the stone face, therefore reducing potential damage or ‘spalling’ of the masonry. In fact, many people still consider lime mortar to be superior to many types of modern mortar mixes. Before, In Progress, and After South Wall: The “Lost” World of Lime Mortar. On older Victorian style or brick homes that were made many years ago repair the rotting. 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