Lime Plaster Floor

The elevated ph of the lime in the plaster will also act as a fungicide.

Lime plaster floor. Mold will not grow in lime plaster or on nearby wood. So to get a durable floor you may need to cure it for some period of time with controlled moisture levels and avoid letting it dry out completely. Compared to cement plaster lime plaster is less brittle and cracks much less requiring no expansion joints as a result. If it s the original lime plaster it s nearly 130 years old so it may be wiser to take it back to brick start with a blank canvass if you do go back to brick don t forget to wear a respirator mask for the dust jack make sure there s plenty of ventilation also.

This involves absorption of co2 from the air and it happens faster when the lime is damp not soaking wet. The plaster used in this process is simply a mix of type s mason s lime limestone sand and water. A gypsum plaster floor as does a suspected pre0th century date see figure 2. Thickness used in this house it s possible to sculpt outside corners to give a softer look to what will become rock hard walls.

Lime plaster can be made in two ways but it does require a fair amount of time and hard work to make it properly. Concrete s not a pretty project it s sloppy and it made a mess of both a floor and me. Finally after all that it was time to do what i love best the plastering. Be mindful however that gypsum plaster floors may well contain some later cement repairs.

Lime ash is generally no longer available so repairs and reconstruction are usually done using a mixture of lime putty coal ash gypsum class a hemi hydrate fine casting plaster unburnt loamy clay and burnt crushed tile. To this are added retardants such as keratin natural or sodium citrate manufactured. If you add lime to it in the proportions you suggest you will probably only get a 4 5 or 5 where an actual lime masonry floor is a 7 5 to almost 10. Then came the wait.

One more thing to note. Ancient lime plaster often contained horse hair for reinforcement and pozzolan additives to reduce the working time. So think of it this way if a stone floor is a 10 an oak plank floor a 7 to 8 then a cob floor is about a 3 to 4 in the way of hardness. Even in the 1 4 in.

In recent years it has become more popular because it is more environmentally friendly than cement. In 2 addition unlike with concrete or cement the surface of a gypsum plaster floor is scratched easily with a sharp knife and rings when gently tapped. First i slapped up two coats of concrete so there would be a inch seamless base for the lime plaster to build upon. Lime plaster is a type of plaster composed of sand water and lime usually non hydraulic hydrated lime also known as slaked lime high calcium lime or air lime.

Traditional non hydraulic hydrated lime only sets through carbonatation when the plaster is kept moist and access. It is very nearly liquefied rock that is troweled onto the walls. Laying a new floor.