Whitewashing with Lime

Lime has been used for centuries in construction and building maintenance. One of its popular uses is in whitewashing, which is the process of applying a lime-based mixture to walls to give them a fresh, clean appearance. Here's what you need to know about using lime for whitewashing:

Types of Lime

There are three main types of lime that can be used in whitewashing:

1. Quick lime: Also known as burnt lime, this type of lime is produced by heating limestone in a kiln until it becomes calcium oxide. It is highly reactive and should be handled with care.

2. Fat lime: This type of lime is made by slaking quick lime with water. It is softer and more workable than quick lime, making it easier to apply to walls.

3. Hydraulic lime: This type of lime contains impurities that give it the ability to set underwater. It is commonly used in damp environments, such as basements, and may not be suitable for whitewashing.

The Best Lime for Whitewashing

Of the three types of lime, fat lime is the most commonly used for whitewashing. It is easy to work with, produces a smooth finish, and has a long-lasting effect. Fat lime can be mixed with water and applied directly to walls, or it can be mixed with other ingredients, such as salt and casein, to improve its adhesive properties.

In summary, the commonly used lime in whitewashing is fat lime. It is soft, workable, and produces a smooth finish that can last for years. While quick lime and hydraulic lime have their uses in construction, they may not be the best choice for whitewashing.