US Heritage Group accepts returns on standard materials up to 30 days from the date the order shipped with a restocking fee of 20% of the material cost. Saint-Astier® Natural Hydraulic Lime (NHL) is an industry-standard used for historic restoration mortar, stucco, and Plaster with no harmful portland cement present or required. But the metakaolin we have sourced from Poraver for our sub-slab insulation and foundations is a very high quality and consistent pozzolan, fired to a high temperature and well-graded for a very reasonable cost. Shea's Plastering Co Inc. 1449 Harpswell Island Road, Orr's Island, ME 04066 (207) 833-2918. Our Lime Mortar & other binders are made from St. Astier Natural Hydraulic Lime. Our lime mortars are quality tested for ease of use & lasting results. We love our customers, so feel free to visit during normal business hours. When a very thick layer or several layers are applied, the lime can remain soft for weeks Natural Hydraulic Lime (NHL) 3.5, by Roundtower, is a strong mortar option with all the flexibility that comes with natural lime. A pozzolan is a term for a mineral additive which, when mixed with non-hydraulic lime mortars, renders and plasters, brings about a slight hydraulic set, achieving a harder, faster set. This product is a traditional material made from 100% all-natural ingredients, and it is breathable and flexible. The hydraulic lime plaster is not affected by water once it has set, so the plaster can handle driving rains and repeated wettings without erosion, unlike clay plaster. The hydraulic lime plaster is much more suitable for exposed faces than a clay plaster Natural hydraulic lime (NHL) plasters are made from limestone deposits in which a significant amount of pozzolanic material is naturally occurring in the limestone. Better yet, see us in person! Hydraulic lime is distinguished from non-hydraulic lime by its ability to cure in damp/wet conditions. Building With Hemp & Hempcrete Hemp Construction, or Hempcrete, is much like concrete and is used mostly to form insulating walls. Prior Park: The chapel gallery ceiling While the stylistic development of plasterwork through the ages is well documented, the history of pre-Victorian plastering technology is … Historically animal hair or bast (plant) fibers were used depending on what was readily available. Traditional non-hydraulic hydrated lime only sets through carbonatation when the plaster is kept moist and access of CO2 from the air is possible. Sign -Up for our Newsletter to find out when we launch NEW Programs and Workshops! Home made hydraulic lime plasters use the more commonly available hydrated lime available at masonry outlets, to which a pozzolan is added. The hydraulic set happens quite quickly, with the plaster being hard to the touch within 24 hours. powered by WordPress, designed by Chris Gooderham, Sustainable and Natural Building Courses & Workshops, Sustainable Building & Design Certificate. Likewise the increased porosity of NHL stuccoes permits water permeating the coating to readily escape again through the surface. As with the Poraver foundation, we mix the metakaolin and lime in even quantities, and use this binder as the basis for the plaster. This product is ready to use; just add water and mix at the site before applying the stucco. Guide to mixing natural hydraulic lime mortar Hydraulic limes differ from non-hydraulic limes in that they have a chemical set as well as the process of carbonation. Hemp fiber of high grade, processed and cut to appropriate length, is now available from US Heritage Group. Hydraulic lime is available as a bagged powder whereas the non-hydraulic lime is a putty, hence the name fat lime putty. Its use dates back at least 6,000 years, to the Ancient Egyptians who used lime to plaster the pyramids. This is the easiest way to use it, because you don't have to do that whole slaking thing. It is mixed with strands of hemp to produce a lightweight, well insulating material. Lime mortar today is primarily used in the conservation of existing old buildings or the recreation of new ones using traditional methods. For a project like the Circle Organic farm building, where conditions are exposed on the exterior and involve lots of veggie washing and other wet activities inside, home made hydraulic lime plaster is an affordable and quite sustainable plaster that will withstand rugged, wet conditions. Natural Hydraulic Limes are commonly used as a replacement mortar in structures originally built of hot and non-hydraulic lime mortars due to their resilience to harsh conditions and normal weathering. It it suitable for historic masonry that may be exposed to high moisture levels or extreme conditions, and it is also recommended for sustainable new-build projects and strawbale construction that relies on breathable, all-natural construction materials. 215-536-6706 in Circle Organic, Materials and techniques. Mortars made with type S lime have superior unit bonding and seismic resistance. Saint Astier® Natural Hydraulic Lime's hemp construction product is called Batichanvre. Solo lime plaster is durable and highly breathable. Posted on January 5, 2014 A hydraulic lime is made from a limestone that either naturally contains or has artificially introduced some form of amorphous silica in the burning process. Natural Hydraulic Lime (NHL) Saint Astier® pure and natural hydraulic limes (NHL) have been in production for over 150 years. Lime plaster is a type of plaster composed of sand, water, and lime, usually non-hydraulic hydrated lime. This amorphous or “free” silica fuses with some of the quicklime to form a clinker, a cementitious compound. Natural Hydraulic Lime (Domingue) Old World . While clay plasters are safer (lime can burn skin, lungs and eyes) and more environmentally friendly (lime and metakaolin both require high temperature firing), this home made hydraulic lime uses an industrial by-product (Metapor) that is sourced locally to create a plaster that has all the weather resistance of cement-based plasters without relying on cement. As a result lime heritage stucco plaster is flexible and extremely breathable. It is moderately hydraulic, recommended when moderate strengths and better freeze-thaw resistance are … Heritage Hydraulic Lime Stucco-Plaster NHL 3.5 – Datasheet.pdf, Heritage Lime Putty-Plaster – Type L – Datasheet.pdf, Concrete, Terra Cotta and Stone Repair Mortars, Heritage Hydraulic Lime Stucco-Plaster – NHL 3.5 – SDS.pdf, Heritage Hydraulic Lime Stucco – Guide Specifications.pdf, Heritage Lime Putty-Plaster – Type L – SDS.pdf, Bedding, Pointing and Tuckpointing Mortars. Any custom materials and materials with pre-blended color cannot be returned. Carmeuse Type S Miracle Morta-Lok Masons Hydrated Lime, when mixed with portland cement, sand, and water is the key ingredient in the mixing of highly plastic workable mortar needed for durable, water-resistant masonry. by Chris Magwood We recommend this product for historic structures built with harder brick or stone. Remember the mortar must be softer than the brick or stone it is matched with! Lime stucco/plaster also recommended for sustainable new-build projects and strawbale construction that rely on breathable, all-natural construction materials. These products are traditional materials made without any gypsum, synthetic additives or acrylic polymers. Lime Mortar Building | Traditional building using brick and Natural hydraulic lime mortar (NHL 3.5). One of the most exciting elements of the Circle Organic farm project is the home-made hydraulic lime plaster we successfully used on the interior and exterior walls of the building. Contact Us. Hydraulic lime is distinguished from non-hydraulic lime by its ability to cure in damp/wet conditions. Brown and scratch coat fibers require fiber reinforcement to resist cracking in tension. Blue Circle Hydralime is a hydrated lime used for increased plasticity & cohesiveness in cement, mortars & renders Fine, white, dry powder which lightens and brightens mortars A high calcium, non hydraulic, hydrated lime Makes floating renders and pointing mortars easier Application of lime plaster: This plaster is used foror the plain side of a brick wall, 13 mm thick plaster is provided and for the rough side of a brick wall, 16 mm thick plaster is suggested. A version of the hydraulic lime plaster with no chopped straw is used to plaster the Durisol block wall. Solo can be applied directly onto plasterboard, wood fibre board or a lime base coat of Duro or Ultra. Lime and gauging (gypsum) finish plasters were commonly used during the early to mid twentieth century. Ancient lime plaster often contained horse hair for reinforcement and pozzolan additives to reduce the working time. Please download our handy, informational GuideSpecs for Repointing Mortars, Sandstone Repair, Injection Grout and Stone Repair. The lime is heated, then mixed with an aggregate material like sand or stone. This product is a traditional material made from 100% all-natural ingredients, and it is breathable and flexible. This product is ready to use; just add water and mix at the site before applying the stucco. Lime mortar is a combination of lime (hydraulic or non-hydraulic), aggregate (sand, grit etc) and water. Plaster Cornice Moulding. The use of a pre-mixed lime render that can cope with walls prone to salt contamination maybe required. Natural Hydraulic Lime mortar consists of two building materials, lime and sand. It contains hydrated lime and plasticiser making it highly workable and cohesive. Hydraulic lime (HL) is a general term for varieties of lime (calcium oxide), which set through hydration.This contrasts with varieties of air lime slaked lime (calcium hydroxide), used to make lime mortar, the other common types of lime mortar, which set through carbonation (re-absorbing carbon dioxide (CO 2) from the air).. The product is applied in three coats: a scratch coat, a brown coat and a skim coat. The home made hydraulic lime plaster is a very straw-rich mix, Tags: natural plaster, straw bale building, sustainable building. It sets with water (rather than with air as with lime putty) hence the term ‘hydraulic’. Weather resistant and durable, this mortar is ideal for most brick and block applications and is formulated to provide a general purpose mix of cement, lime and specially graded sand. This coat is applied by hand until it has been built up to the right thickness, and then smoothed out with a magnesium or wood float. E.I.F.S. Lime Green Solo is a preblended lime plaster made with natural hydraulic lime that only requires the addition of water. How to apply lime render plaster lath and cob repairs in conservation home made hydraulic lime plaster endeavour sustainable build naturally blog lime over clay when is that ok is lime plaster safe to use the facts and tips you need know. Meanwhile we encourage you to contact us for project-specific technical advice, product selection or to place an order. You can also buy lime putty in tubs or bags, depending on where you live. Hydraulic hydrated lime may be used in the scratch or brown coat of plaster, stucco, mortar, or in Portland-cement concrete either as blend, amendment, or admixture. Saint-Astier® NHL is pure and natural, free of additives, and has been in use throughout the world for over 150 years. While convenient and strong, gypsum does not expand and contract to the same degree as pure lime causing failures that make it incompatible with pure lime base plasters. Technical Datasheets are coming soon! Lime mortar is composed of lime (hydraulic, or non hydraulic), water and an aggregate such as sand. Hydraulic lime plaster is simple to use and faster setting; best suited for vertical areas of masonry. The flexibility of natural hydraulic lime as a binder in mortar and stucco mixes reduce cracking, allowing wall assemblies often to bend rather than break when subject to typical settling over time. Lime Based Plasters Viero is the Italian distinction of textured decorative finishes and plasters, specifically designed for the world of architecture, interior decoration and contract projects world-wide and for all those who appreciate and value made in Italy and innovation without limits in colour, texture, thickness and individuality. Hydraulic lime is a type of lime, or calciumcarbonate, which is used to make mortarand plaster products. The hydraulic hydrated lime shall conform to the chemical composition requirements for calcium oxide, magnesium oxide, silica, iron oxide, aluminum oxide, and carbon dioxide. The characteristics of the raw materials are unique and consist of an undisturbed layer of calcareous rock infiltrated mainly by silica with only traces of other minerals. Shipping fees are not refundable. These limes come from large deposits in France, and to a lesser degree, Portugal. These limes can be purchased in North America, but are very expensive and it is carbon-intensive to ship heavy materials from overseas. This makes working with hydraulic lime much easier for most builders as it's practically the same as working with cement. The metakaolin/lime/sand mix can be used as a plaster on smoother substrates without the use of chopped straw. The product is applied in three coats: a scratch coat, a brown coat and a skim coat. The techniques employed in the application of hydraulic lime plasters should be to ensure a correct bonding with the background while striving to minimise shrinkage and rapid drying. This “push-in” mix is made quite thin and wet, and is used to quickly push into the straw bales by hand or trowel because it adheres very well to the straw. We first mix up a batch that is 1 part metakaolin, 1 part hydrated lime and 3.5-4 parts sand. Tweet. Heritage Natural Hydraulic Lime Stucco/Plaster is a dry material with aggregate preblended into the product. Whats people lookup in this blog: Exterior Lime Plaster Recipe; Share. We have attempted to mix our own pozzolans with lime in the past, with mixed and mostly disappointing results. Heritage Natural Hydraulic Lime Stucco/Plaster is a dry material with aggregate preblended into the product. Lime putty is fabulicious, and you can use it in plaster, as a lime wash, or in lime mortars. The limestones from which hydraulic limes are formed naturally contain a varied range of minerals of which silica and alumina are the main ones for creating hydraulic lime. Natural hydraulic lime (or NHL) comes from limestone that has natural impurities of clay and other minerals, the amount of impurities within it determines how hard it will set. Once this mixture is blended with water to form mortar, it can be used in … It will not set when submersed in water. We then immediately cover this with a mix that is 5 parts metakaolin, 6 parts hydrated lime, 13 parts sand and 15 parts chopped straw. Hydraulic Lime Plaster (Base Coat) Base coat has a coarser texture, it is applied directly to masonry as the first and second layer of the traditional three coat lime plaster system. Natural hydraulic lime (NHL) plasters are made from limestone deposits in which a significant amount of pozzolanic material is naturally occurring in the limestone. The recipe for the push-in and the body coat are enshrined on some scrap wood! Non-hydraulic lime is softer and sets much more slowly. With this new recipe, we are able to make a plaster with locally sourced materials that has a quick hydraulic set and is not affected by erosion or wear due to rain, as can happen with clay plasters. This is slower than cement-based plasters, leaving more working time and being more forgiving, but much faster than clay plasters which must dry out, often over several days or weeks. Due to the introduction of Portland Cement in the 19th Century, the use of lime declined. LaFarge NHL contains over 42% free lime, aiding in the workability and breathability of mortars and plasters made with it. Our product formulation, based on historic plaster research and material analysis, offers outstanding skim coat plaster performance for fine interior finish work over traditional lime plasters. Solo Lime Plaster. Ian Constantinides examines the use of traditional lime plaster and explodes some popular myths and misconceptions. Compared to cement plaster, plaster made from hydrated lime is less brittle and less prone to cracking, requiring no expansion joints. Heritage Hydraulic Lime Stucco/Plaster. They can be used for a variety of applications for laying brickwork, bedding tiles, rendering and plastering. These limes come from large deposits in France, and to a lesser degree, Portugal. Hydrated lime can be mixed with portland cement and other ingredients to make mortar mix and base coat stucco Complies with ASTM C2078 Complies with ASTM C926 Such a mix could be used over a wide variety of wall types, and also used as a final finish coat over the chopped straw mix. For Most US installations we recommend NHL (Natural Hydraulic Lime) 3.5. This provides a smooth surface that can suffice as a final finish, but also leaves a slightly textured surface in case a final, thin finish coat is desired. We plastered the Durisol block walls on the project with this type of plaster. Natural hydraulic lime powders come in … Non-hydraulic lime plaster requires moisture to set and prevents it from drying for several days. The material properties of hemp fiber made it an excellent fiber for plaster reinforcement as documented in reference material from the period. Heritage Lime Stucco/Plaster products are ideal for building durable and beautiful exterior or interior finishes on historic masonry. Home made hydraulic lime plaster has several advantages over our typical clay plasters. QUIKRETE Hydrated Lime type S is suitable for use in building construction. Techniques of Hydraulic Lime Plastering. 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