Does you walls dampen due to water logs? Finally you can solve this problem. Find out!
News Hub CreatorJun 21, 2021 7:23 PM

Many urban cities in Nigeria is filled with water logs or are surrounded by water bodies and this waters easily affect structures and buildings without a highrise in foundation soaking the walls around the building. These dampness has adverse effects on the integrity of the building but more importantly is the crusty effect and termite breeds found within these loose surfaces within the room



These Following methods under listed are generally used to prevent the defect caused by dampness in a structures and give ur living room,sitting room,shops and others a facelift so you won't need to cover that ugly space from visitors

1. Membrane Damp Proofing



This consists in providing layers of membrane of water repellant material between the source of dampness and the part of the structure adjacent to it. This type of layer is commonly known as damp proof course (DPC) and it may comprise of materials like bituminous felts, mastic, asphalt, plastic or polythene sheets, cement concrete, etc.

Depending upon the source of dampness, DPC may be provided horizontally or vertically in floors, walls, etc. Provision of DPC in basement is normally termed as tanking.

General principles to be observed while laying damp proof course are:

Each DPC should be placed in correct relation to other DPC so as to ensure complete and continuous barrier to the passage of water from floors, walls or roof.


2. Integral Damp Proofing

This consists in adding certain water proofing compounds with the concrete mix to increase its impermeability. Such compounds are available in market in powdered as well as in liquid form

Another form of compounds like alkaline silicates, aluminium sulfate, calcium chlorides, etc react chemically when mixed with concrete to produce water proof concrete.



Pudlo, Imperno, Siks, etc. are some of the many commercially made preparation of water proofing compounds commonly used. The quantity of water proofing compounds to be added to cement depends upon manufacturers’ recommendations.

In general, one kg of water proofing compound is added with one bag of cement to render the mortar or concrete waterproof.

3. Surface Treatment

As described earlier, the moisture finds its way through the pores of materials used in finishing. In order to check the entry of the moisture into the pores, they must be filled up.

Surface treatment consists in filling up the pores of the surfaces subjected to dampness. The use of water repellant metallic soaps such as calcium and aluminium oleates and stearates is such effective in protecting the building against the ravages of heavy rain. Bituminous solution, cement coating, transparent coatings, paints, varnishes fall under this category.

In addition to other surface treatment given to walls, the one economically used is lime cement plaster. The walls plastered with cement, lime and sand in proportion of 1:3:6 is found to serve the purpose of preventing dampness in wall due to rain effectively.

4. Guniting

This consists in depositing an impervious layer of rich cement mortar over the surface to be waterproofed. The operation is carried out by use of a machine known as cement gun.

The surface to be treated is first thoroughly cleaned of dirt, dust, grease or loose particles and wetted properly. Cement and sand (or fine aggregates) usually taken in proportion of 1:3 to 1:4 are then fed into the machine. This mixture is finally shot on the prepared surface under a pressure of 2 to 3 kg per square cm by holding the nozzle of the cement gun at the distance of 75 to 90 cm from the working surface.

The quantity of water in the mix can be controlled by means of regulating valve provided in the water supply hose attachment. Since the material is applied under pressure, it ensures dense compaction and better adhesion of the rich cement mortar and hence treated surface becomes waterproof

5. Cavity Wall Construction

This consists in shielding the main wall of the building by an outer skin wall leaving a cavity in between the two. The cavity prevents the moisture from traveling from the outer to the main wall.

Hope this will help?

Do you have a better idea on preventing wall dampnesso tou