18th Aug 2021

Exterior walls, exposed to the elements, become damaged over time if they are not treated with protective substances by professional painters and decorators. Brick, concrete or stone walls are exposed to the summer heat, while enduring hail, ice, rain, sleet and snow throughout winter. These environmental factors may damage the structural integrity of outside walls.

Professional painters and decorators, possessing the necessary experience and qualifications, can prevent damage to new walls as well as clean existing structures that have been exposed to the elements. Protecting, treating and maintaining exterior walls can extend their lives by several years and reduce the need for expensive repairs.

Damaged Walls

Water, present in the atmosphere throughout the year, will be absorbed by porous building materials that are used to construct exterior walls and which have not been protected by a waterproof sealant. Block, brick and sedimentary rock such as limestone or sandstone are often used to build outside walls and are all susceptible to absorbing environmental moisture that can cause them to crack and crumble over time. Water absorption damages the crystalline structure of porous building materials erodes exposed surfaces and causes fissures to appear when absorbed water expands or contracts in accordance with temperature fluctuations. Invasive lifeforms, such as lichen and moss, thrive on external walls that have not been treated with a protective sealant.

Treating Exterior Walls

Wall sealer, applied by professional painters and decorators, creates a waterproof layer that protects exterior structures from rain and airborne moisture. The best wall sealers permeate the materials from which outdoor structures are made, offering protection at deeper levels while allowing the walls to breathe.

Groundwater, a major cause of foundation erosion, is a problem in some areas and appropriate measures should be taken to protect exterior walls from its damaging effects. Proper drainage of land, as well as the installation of protective barriers, is the most effective method of guarding buildings against groundwater but waterproof coatings can be applied to foundations in order to reduce the risk of subsurface water damage.

Professional painters and decorators, when working outside, prefer to treat and protect exterior walls when it is neither cold nor wet. Paint and wall sealer, especially that which is water-based, takes longer to dry when the temperature is low and the moisture levels are high while warm and dry conditions are ideal for evaporating the liquid in the protective substance. It is important to remove algae, lichen or moss from wall surfaces before painting and decorating. Checking the weather forecast allows the protective coating to be applied to exterior surfaces when outdoor conditions are advantageous, different sizes and types of brushes should be used for different portions of walls while masking tape and ground sheeting protects against spills and other accidents.

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