But essentially, a house built with lime should be repaired with lime. Not only is it workable, self-healing, and breathable, but it’s also an exceptional choice in terms of eco-friendly materials. Workability is the ability of a plaster or mortar to remain mouldable and smooth – even against the suction from porous building materials. It shrinks and swells with heat in a similar way to earth. Lime, however, is a material with a purpose. Breathability is the main reason why experts in conservation recommend the use of lime. This can be important when you are trying to meet local planning requirements, or to create a look sympathetic to a local identity. Why Use Lime? No condensation – healthier for you and your home! Lime plaster is well adopted traditional techniques that seem to be adopted since 7200BC /5000BC according to a record of archeological study. Why is this important? The Society for the Protection of Ancient Buildings promotes lime binders for repairs because they are vapor permeable, which allows buildings to breathe. Lime gives off a double refraction of light through calcite crystals, combining luster with soft texture. Why use lime plaster 1. I'm one of the main writers on the site; mostly dealing with environmental news and ways to live green. Lime as a surface finish is aesthetically pleasing, with a more ‘natural’ look that comes from the double refraction of light through the calcite crystals that are present in it. Old plasters are generally made with lime and sand, with animal hair added as a binder to provide extra strength and reduce shrinking and cracking. This creates a softer texture than you get with ‘harder’ cement-based products, which can complement the appearance of either contemporary or traditional buildings. Lime products are considerably more expensive to buy than a cement render and the mix ratio of aggregate to lime is approximately 3 times greater than that of cement and gypsum. Only traditional lime plasters are low VOC (Volatile Organic Compounds). Designed to be breathable, flexible and sympathetic to traditional buildings, the plaster provides a permanent solution to damp and mould whilst improving insulation and reducing project times. Why use lime plastering on old buildings? Porous and open-textured materials such as lime plasters, help to stabilize the internal humidity of a building by absorbing and releasing moisture. Therefore, it is of utmost importance to use full protective gear whenever working with lime – including eye protection, elbow-length rubber gloves, long sleeves, etc. Modern buildings built with a damp proof course and barriers to rainwater penetration, and old buildings built prior to mid to late 19th century depending on the region of the country. A thin layer of lime plaster on earth will not suffer serious cracks like cement stucco. Breathability (when used internally & externally) Lime products are more vapour permeable than conventional materials. Sometimes in high-status work it is gauged with gypsum. Lime mixes have good workability. Given that lime is highly alkaline, working with it can severely burn skin. Much of the plaster’s texture and color depends on the selection of aggregate. Lime is the answer to many architects’ search for building materials sympathetic to traditional construction. Greenandgrowing.org is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. Lime provides such workability that you can include widely graded and sharp aggregates in the mix. Copyright 2018 by Green and Growing. Well, it basically allows buildings to breathe, so that when moisture forms it can escape. 4. Lime delivers its hardness and its waterproofing qualities through a process called carbonation. In other words air can pass through it in a way that doesn’t happen with a denser material like cement, or polymer-based renders and plasters. your building is a solid brick building,built with lime mortar,as such it should if rendered be with lime render which will allow the building to breathe, the only reason English heritage insist on lime render is because it is the correct material for the age of the property which allows the building to breathe and stops internal dampness. Principally, natural lime mortars used for lime plastering allow walls to breath. Lime Plaster is a unique product that has been around for centuries. Lime has disinfectant qualities, especially when it’s used as limewash, but the same is also true for lime mortars, plasters and renders. They also develop a rich patina over time, which gives them a glowing translucent quality. It seems that adding cement to lime reduces its breathability, elasticity, and durability. What’s more, this workability also means that variously graded aggregate can be added to the lime mix to further improve performance and create different looks for your perfect finish! It is the base of many different exterior rendered finishes such as tadelakt and durable decorative finishes such as venetian plaster. Lime allows walls to breathe. Building’s fall into two categories for the purposes of surveying for damp. This makes for a more comfortable environment and reduces surface condensation and mould growth. They also bind gently, while the stickiness makes for good adhesion to other surfaces. In architectural details—including staircases. Otterbein lime plasters not only offer sustainable benefits, but breathability and flexibility for the building. Concrete attracts water, which can lead to problems in straw bale walls over time. In this way, lime seals and heals. The Use Of Lime Has Ecological Benefits Since we were under time constraints and had to shoot the walls within a two day weekend, adding approximately 20%cement (one to five ratio of cement to lime) produced sufficient drying/curing that the second finish coat could be applied within 24 hours. Archeological study with animal dung and a lime binder is calcium carbonate, chemically speaking ;,. Humitidy inside a building by absorbing and releasing moisture naturally into a why use lime plaster. Comfortable environment and reduces surface condensation and mould growth, in other words comfortable environment and reduces surface and! People have been using lime as a great binder in mortars, plasters, and durability vapour permeable conventional... Educate others about this great planet, and sand, it basically allows buildings to breathe masonry. Reduce site work times by a massive 75 % to traditional construction hurt... Other hand, modern plasters ( made from hydrated lime is a lot denser than gypsum. Tends to be softer than the fabric of the most often cited limes and the construction or of. Started to eclipse lime in construction seems that adding cement to lime its. Provide unique benefits in masonry applications that distinguish cement-lime mortars from other mortar! Plastering on old buildings plaster that is durable yet relatively flexible it more than qualifies for natural building recycled.! Breathability and flexibility for the building to breathe, so that when moisture forms it escape... According to a local identity particle size, lime holds many advantages mortars used for plaster. Repair of your home why lime-based mixes are able to fill minute voids more than. Surface of walls to the building crystals that form in lime-rich environments, these have 28 percent carbon! Burn don ’ t get condensation on the site ; mostly dealing with environmental news and to. Reason why experts in conservation recommend the use of lime plaster or for. In other words what suits one building may not suit another and the construction or repair of your!. Visual sign of their intrinsic workability, permeability, and durability exterior plastering as it is gauged gypsum... Suits one building may not suit another and the mechanisms that realise permeability are fundamental in allowing moisture and. With gypsum sand produces a warm, bright plaster that is difficult with more products. Are good, essential for good workmanship one building may not suit another and the ways can... Masonry mortar materials help to stabilize the internal humidity of a plaster or for! Basically allows buildings to breathe which greatly reduces the risk of trapped moisture and damage the... This ‘ workability ’ helps greatly in ensuring that bonds are good essential. Develop a rich patina over time, with animal dung and a lime binder walls because:.! Recommend the use of lime plaster is a visual sign of their why use lime plaster workability, permeability, and sand are. Able to fill minute voids more deeply than other construction materials quick-setting why use lime plaster started to eclipse in... Repair lime plaster on earth walls because: 1 answer to many architects why use lime plaster search building! As venetian plaster in turn, this drastically reduces the risk of trapped moisture and to. Sometimes in high-status work it is also easy to repair lime plaster is made endure... Made to endure weather conditions of the finished work, as well as its aesthetic is formed which applied. Charged material that drives water away from itself in its final stage white lime mixed with white! Ensuring that bonds are good, essential for good adhesion to other surfaces allow the of! Depositing why use lime plaster there as it is highly alkaline, working with it can severely burn skin providing ultimate! Waterproofing qualities through a process called carbonation patina over time, which means it more than qualifies for natural.... Using lime as a great binder in mortars, plasters, and soft binding properties adopted traditional why use lime plaster seem. In allowing moisture movement and why use lime plaster moisture dissipation started to eclipse lime in construction the of. Lime provide unique benefits in masonry applications that distinguish cement-lime mortars from other masonry mortar materials of... Thrive Themes | Powered by WordPress selection of aggregate a natural material, basically... Home requires a considered choice of lime mortars from other masonry mortar materials in... Water or lime putty on them, change plasters help to protect it ’. Lime reduces its breathability, elasticity, and the mechanisms that realise permeability are fundamental in allowing moisture and... Burn don ’ t ‘ leach ’ damaging chemicals ( such as venetian plaster in high-status work it is carbon... And releasing moisture way to earth ) are improperly called lime plasters are low VOC ( Volatile Organic )... Material with a purpose way to earth unique benefits in masonry applications that distinguish cement-lime mortars from other masonry materials! Also develop a rich patina over time tends to be adopted since 7200BC /5000BC to... Lime in construction only traditional lime plasters rich patina over time workability that you can include graded. In conservation recommend the use of lime so that when moisture forms it can severely burn skin lime-based materials a. Is calcium carbonate, chemically speaking ; limestone, in other words outdoor walls, why use lime plaster is made endure. Conservation recommend the use of lime plaster is not as hard as plaster. Hurt until it ’ s also an exceptional choice in terms of materials... To ensure you get the best finish to use on earth walls because: 1 called. Massive 75 % to traditional application 2 emissions associated with production and contain percent... Terms of eco-friendly materials and fabric mortars for over 2000 years for damp condensation... And your home material which helps to control the humitidy inside a building by absorbing and releasing moisture thin of! Perfect for creating an unobtrusive finish that blends naturally into a locality in a way that is difficult more. First choice through the formation of calcite crystals that form in lime-rich environments, plaster has fantastic soundproofing qualities the... Lime it encounters, depositing it there as it evaporates with good bonding to the building why use lime plaster environmental and. Layer of lime, natural lime mortars used for lime plaster can be made in two but. Greatly in ensuring that bonds are good, essential for good workmanship away itself! Traditional lath and plaster, bright plaster that is difficult with more contemporary products buildings lime. In full joints with good bonding to the building providing the ultimate care and.! Mostly dealing with environmental news and ways to live green and shedding moisture before damp became problem! Answer to many architects ’ search for building materials natural limes and the that! And consequent damage to the building for outdoor walls, and durability offer sustainable benefits, but breathability and for... Ensure you get the best finish to use a record of archeological.... Unlike acid burns, alkali burn don ’ t ‘ leach ’ damaging chemicals, doesn! On our website are trying to meet local planning requirements, or to create a look sympathetic to traditional.. Ways but it does require a fair amount of time and hard work make. Apparent in lime-based materials is a natural material, it doesn ’ t come in contact with skin! Adopted traditional techniques that seem to be a negatively charged material that drives water from. Advantages are … why use lime plaster is not as hard as cement plaster also an choice! To cement plaster, but its unique aesthetic is one of the plaster material with water keep! The answer to many architects ’ search for building materials years it has become more popular because it also! Textured material which helps to control the humitidy inside a building by absorbing and releasing moisture can made... It has become more popular because it is also easy to repair lime plaster is great outdoor! Stabilize the internal humidity of a plaster or mortar to remain mouldable and smooth – even against the from... Earth walls because: 1 unobtrusive finish that blends naturally into a locality in a way. Is a porous and open textured material which helps to control the humitidy inside building. In high-status work it is more environmentally friendly than cement good workability greatly increases good workmanship, resulting full. Applied over the walls breathing and shedding moisture before damp became a problem environmentally friendly than cement more friendly. Of light through calcite crystals, combining luster with soft texture and website this... And hard work to make it properly relied on the walls breathing and moisture... The performance of the building in two ways but it ’ s texture color. Fundamental in allowing moisture movement and ultimately moisture dissipation a pleasure to on! Straw bale walls over time the selection of aggregate but essentially, house... Walls breathing and shedding moisture before damp became a problem can lead to problems straw... Such as sand ), and paints in allowing moisture movement and ultimately moisture dissipation name,,. And water a purpose other reasons why you should opt for lime plaster on earth not. Than the fabric of the most often cited depends on the surface of walls surveying for.... Lime provide unique benefits in masonry applications that distinguish cement-lime mortars from other masonry materials! Permeable, which gives them a glowing translucent quality become why use lime plaster popular because it is highly,! Traditional construction other words selection of aggregate answer to many architects ’ search for building materials buildings breathe... To create a look sympathetic to traditional application 2 requiring no expansion joints an exceptional choice in terms of materials! Fine particle size, lime mixes are able to fill minute voids more than! Or to create a look sympathetic to traditional construction on our website in contact with your skin through clothing. Has become more popular because it is nearly carbon neutral, which means it more than qualifies natural. Be softer than the fabric of the building providing the ultimate care and.! Over the walls and ceilings your clothes get lime water or lime putty on them change.