This page contains a price guide for a new patio. It clearly indicates how easy the Point Master makes this previously highly difficult job. Mortar Thickness: The thickness of mortar is varied as per the work and load on work. Left unrepaired, water can seep in between the cracked, loose mortar and cause interior wall damage. Rubble stone masonry was explicitly mentioned, as in PSP 101-51 (1951) which ranks the use of â natural stone of irregular shapeâ in categories 3 and 4, depending on mortar type. If not purchasing a pre-mixed mortar then next select the correct sands for texture and colour. Replies. The mortar should be very well mixed -balling must be avoided. end mix will be needed for the following areas of exposure: • Chimneys • Parapets • Copings • Splash areas at base of walls • Below DPC The following points need highlighting for all mortar work: 1. We suggest our pre-mixed lime mortar for internal and external lime pointing applications. 4.60 MB. To replace large stones that have fallen from the wall, lay down a thick bed of mortar and set the stone in place. Hope this helps. If your house is older than that, it almost certainly was built with lime mortar or with a mix that incorporated some cement with lime and sand. Gauging . X. Lime is also a natural fungicide, so the wall will remain looking better for longer. Ian's approach involves two separate steps - tamp pointing and then finish pointing. I'm redoing the stove room from the inside. It should be hard, durable and free from contaminates such as soluble salts. 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. Whether your house is constructed from brick or stone, mortar can make up as much as 15% of its overall surface area — so it isn’t hard to see what a huge impact repointing brickwork can have not only on the stability and performance of your home, but also on its final appearance. Cement doesn't breath at all so the walls will breath a lot easier through a lime based joint. Instead of mortar, the use of adhesive is also a choice. The process of fixing crumbling mortar in a stone wall is quite tedious, but it’s also pretty simple. 4 to 1 mix is far too strong. Mortar mix for stone foundation. in your case i would go for 6 sand, 1 cement, 1 lime. Exposed walls may need a more durable mortar than a sheltered area of a building. Older mortar made with lime and sand gives way rather nicely with a hammer and chisel. Wall having inner or outer face is plastered with 12mm to 20 or even some case 25mm Plastering. Pointing is a necessary and important part of finishing construction on a brick wall. but your wall would be better re-furbished with a decent mortar (as said earlier), a proper pointing trowel and a soft brickies brush. Stone walls need to breath and they mostly do that through the joints. The soft and permeable qualities of lime mortar allow for any movement in the structure and ensure moisture in the walls can freely evaporate. a short demo of mixing traditional lime mortar for pointing stone walls and bricks,showing you tools ratios and techniques. For bedding under the slabs use 5 parts sharp sand, 1 part soft sand and 1 cement. Is there a "correct" mortar for repointing old stone walls in a house? rlrefalo | Posted in Construction Techniques on January 24, 2008 06:30am Hey Guys, I need to repoint the stone foundation in some spots. Traditionally stone and brick buildings were built and repointed using lime mortar. 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