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External Walls Repair

The external walls face the direct brunt of rain and other changes in weather. Therefore, it is not enough to just decorate the building, but also waterproof it.

Recommended Solution

Use Dr. Fixit Raincoat exterior acrylic coating that offers waterproofing as well as superior sheen.

  • Twice as thick as normal paint
  • Resistant to algae and fungus
  • Available in more than 700 shades
  • Free preview and site trials  

Conventional Method

External walls are painted at regular intervals with normal acrylic paints for a decorative finish only which have a film thickness of just 5060 microns, and so do not resist the formation of cracks which result in leakages.


Q. Why is there a need for waterproofing

External walls are built with masonry to fill the spaces in the RCC frame containing slabs, beams and columns. This lends itself to seepage of rain from the external walls to the interiors. Cracks in plasters lead to water seepage. What is required is a high performance waterproof coating that would prevent seepage of water from the external walls to the interiors of the building.  

Q. There are cracks on the external walls through which rain water is seeping inside the house and ruining my interior décor. How do I resolve it and stop seepage?

If the cracks are small and there is no problem with the structure, use a flexible crackfilling compound, Dr. Fixit CrackX for filling the cracks. This is a ready to use water based acrylic crack filler that seals the crack up to 5 mm. If the cracks are more than 5 mm, use nonshrink crack filler Dr. Fixit CrackX Shrinkfree. Painting is possible after 24 hours. Unlike cement that permits seepage, Dr. Fixit CrackX is waterproof and is ideal for small cracks.

Q. Our building situated in Mumbai, is over 10 years old. The external plaster has deteriorated and needs to be removed. Advise us the correct system of replastering which will give waterproofing and enhanced durability?

Plastered surfaces develop cracks due to deterioration of plaster arising out of bad construction practices, inadequate curing, aggressive climatic conditions, etc. You need a mortar, which is dense, cohesive and has waterproofing properties. To get good bonding between new & old plaster surface, use Dr. Fixit Pidicrete MPB, an acrylic bonding agent. While making plaster, add Dr. Fixit Pidiproof LW+ to impart waterproofing to the plaster. It also reduces the rebounding loss which results in saving time and material.

Q. The chajja and balcony of our society have developed cracks on the surface. How do we repair it?

The chajja and balcony are one of the most prominent areas from where rainwater seeps inside the house ruining the interior décor. The chajja and balcony are to be repaired with Dr. Fixit Pidicrete URP, a polymer modified mortar.

Q. How can I protect the external stone cladding from rainwater seepage and decolouration and moss patches?

 Use, Dr. Fixit Repellin WR, a silicone based liquid which reacts with the silica in the stone or concrete surfaces to protect the stone cladding from seepage and decoluration. In case of maintenance, you can scrape off the salts appearing on the surface, and reapply the Dr. Fixit Repellin WR in that place only. This is true for all silicone based water repellents

Q. Generally, the exterior paints are decorative in nature, but does not protect it from rainwater and thus gets damaged in 23 years. Do you have waterproof exterior paint?

Exterior paints available in the markets provide decoration only and has only 5060 microns of thickness, which is not enough to withstand the rain water pressure. So, the paint film ruptures easily and rainwater seeps inside the wall.You need an elastomeric waterproof coating, Dr. Fixit Raincoat which builds 110120 micron thick film which resists rain water. It is a UV resistant coating and does not attract dirt. It&rsquos high sheen makes it look new for years to come. The coating is available in 700+ attractive shades to add beauty to building exteriors.

Q.Even after the proper plastering of the internal surface there are still many hairline cracks which have developed on the internal walls?

You can use Dr. Fixit CrackX Shrinkfree for sealing plaster cracks up to 10 mm. It is a nonshrink crack filler and is easily paintable over to match the shades of the wall.

Q. What is the impact of leakages on the health of an individual and is waterproofing a must or I can skip it?

Persistent dampness inside the house promotes the bacterial & fungal growth posing threat to the health of the residents. It can lead to respiratory disorders like asthama and frequent cold and cough. Damp walls can also generate a foul stench which makes living impossible in the house.