Construction guide Field Series Episode 5 Basement water proofing

Construction guide Field Series Episode 5 Basement water proofing

Basement water proofing procedure

Construction Field series Episode 5 – R.C.C Basement water proofing

In this episode our technical staff will explain proceedings after following steps discussed in last episode:
-Starter for layout of retaining walls
-Reinforcement for retaining walls
-Electric conduit
-Shuttering for concrete pouring
-Concrete pouring for retaining walls

Next to be discussed: R.C.C Retaining walls water proofing that will include brief tutorials about:

Joint protection

Since R.C.C basement bed and R.C.C retaining walls are made separately, hence both has a joint which although is protected internally by placing water stopper, but still for more protection externally, joint is protected by using LATEX chemical by any good water proofing company. Before applying LATEX as shown in the video, surface is rubbed and cleaned from any kind of debris and then washed with water. LATEX is mixed by ratios as told by the respective water proofing company and applied in patches of 10 – 15 feet maximum by brush as shown in the video. After applying latex chemical, 1:2:4 concrete is placed throughout the joint.

Filling of concrete honeycombing

Concrete honeycombing is very common phenomenon which emerges due to improper water ratios, no vibration of concrete, not using admixtures. However incase of basement retaining walls, repairing honeycombing patches is very important which is done before applying chemical coating to walls by simply filling the patches with normal plaster mortar.

Chemical coating for water proofing

After repairing honeycombing, basement water proofing for retaining walls is done using chemical coating by any good water proofing company. Coating should always be carried out in two coats. Another method which is more recommended is membrane water proofing in which PVC membrane sheets are pasted throughout the walls. But it is much more costly as compared to normal chemical coating procedure. Economical alternate to chemical coating are Neru plaster or chips plaster. After completing this procedure and before backfill, polythene sheet should be applied along the retaining walls for more protection

Internal brick walls and shuttering works along with extra brick foundations if any.

Internal brickwork for walls of rooms are completed at this stage. If you require steel chogaths that are also fixed during brickwork. After completing brickwork shuttering is done to hold concrete of slab during pouring process. Shuttering can be done in multiple methods such as using wooden planks, steel plates and palai sheets etc.

Incase of residential projects, covered areas of basements are normally lesser as compared to upper floor, hence foundations of those walls of upper floors which are out of basements perimeters, are to be built at this stage. One thing that must be took care of is that if any foundations falls in basement’s extra excavation area, it should be made from complete depth of excavation done for basement.

Reinforcement and Concrete pouring 1:2:4 M15

Reinforcement for slab of basement is done as per the structural drawings provided by structural engineer followed by electrical conduit. M15 concrete pouring is composed of 1 ratio of cement to 2 ratio of sand to 4 ratio of crush aggregate and mixed with 24 to 25 litres water. Concrete should always be vibrated using vibrator so that the mixture blends together. Better blending means more strength. Admixtures can also be used for making concrete more water proof and less honeycombing. After concrete pouring, it should be cured for at least 10 days to gain comprehensive strength.

RCC(Reinforced cement concrete) structure have a higher cost, and basements are constructed in RCC structures. Financially it is out of budget for most of us to afford basements. However it has many benefits e.g. extra living space, controlled temperatures in summers and winters both, safe from outside pollutions such as noise and dust etc. Basements can be designed for complete and partial accommodations. A complete accommodation includes master bedrooms with washrooms along with other divisions such as living area, store, servant room etc., whereas partial accommodation only includes later divisions. Partial accommodations are recommended more since it does not have wet areas such as washrooms & kitchens hence not requiring installation and maintenance of septic/liquid waste disposal systems.

Field series Episode 5 basement water proofing

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About The Author

Mohsin Munir
Holding a degree in BS EE (Electrical engineering) and astounding knowledge of house construction business since 2010, wide experience and relevant expertise in the construction business. Believe in research based strategy while holding a distinguished position in the construction market. Started at a small scale in 2010 and recognised among the top builders and contractors in Pakistan now, especially among the expatriates and overseas Pakistanis who always trusted in our commitment and services.


  • maqsood on September 4, 2022

    Can you please advise any specific company when it comes to chemical waterproofing products? Have you guys used ressichem products for example? which would be better option, chemical waterproofing or bituminous sheets?

    • Mohsin Munir on September 4, 2022

      Both chemical and membran are more superior to bitumen coatings for basement water proofings. In Pakistan , ultra and Sika brands are commonly available only. Although due to recent import restrictions both these brands costs have gone up and availability is also and issue.

  • Muhammad Asif on March 20, 2018

    We would like to take this opportunity to introduce our company and some of our products.

    Founded in 2008, Abroh is an international company that deals in broad range of chemicals and other interior and exterior décor products being utilized at both household and industrial level. With a wide range of products, Abroh serves its clients with latest innovative products and services while maintaining a commitment to quality, safety and sustainability. Therefore, Abroh has secured leading position in many end markets such as food & beverages, transportation, building & construction etc. Abroh is headquartered in Lahore, Pakistan with regional offices in different cities of Pakistan and abroad.

    we have range of products that can not only add value to your products but also can save hefty costs at different levels. Majorly we can serve you in following;

    Water Proofing ( Chemical water proofing, Bitumen water proofing, Membrane water proofing & High grip, Irani, Roof grip membrane,Tile mud, etc )
    Heat Proofing (Shelter Ac-22)
    Integrated Pest Control Management ( Fumigation,termite Control,etc)
    Interior & exterior (wallpapers,Wooden & Vinyl Flooring, False Ceiling, PVC Wall Paneling, Glass Papers, Rock Wall, etc)
    All type of Paints

    We are looking forward to have long term good business relations with you.

  • Shahram on February 21, 2018

    Really amazing work you guys are doing.You introduced new techniques.You are the first preference for me and will suggest everyone.

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