Why Would You Need Tanking

Why Would You Need Tanking

Why Would You Need Tanking?


Why would you need tanking? This is a topic we have covered before but we thought we would go over it again as we are still helping lots of customers across London & Berkshire with tanking their basements or cellars.


DH Damp Proofing & Plastering have been helping customers achieve a damp free sub-floor level living space for years now. Many period properties were not built for modern living and were also less likely to be built with a damp proof course that would still be functioning correctly today.


As time has gone on more and more of us have begun to utilize basements and cellars for living spaces instead of storage areas. Either during or quickly after converting these areas it becomes apparent that damp is present and will lead to further problems.


It is at this stage that we are asked to come and take a look to find out what is going on and more importantly how to fix it.


The reason that these areas are damp is because there has not been any damp proofing method used previously or that one that has been installed has either failed or been do so incorrectly. Due to the lack of sufficient damp proofing in this area, moisture is able to ingress and start to cause problems.


Sometimes the cause of the damp is due to down spouts and gutters not being fitted for the purpose of avoiding water flowing in the direction of the basement or cellar. Sometimes flooding can cause moisture to ingress along with heavy rainfall flowing towards the property.


General moisture that lays in the surrounding grounds can also be a factor in causing damp to enter into the basement or cellar.


Once the basement or cellar is exposed to prolonged moisture it can lead to damp problems on the exterior. Damp patches on walls or floors, dangerous black mould growth, musty smells, timber can fall victim to wet or dry rot and timber infestations can occur. Wall and floor coverings are also likely to be damp, wallpapers peel, paint bubbles and peels and floor coverings can become significantly damaged.


So how do we fix it? We use a method called tanking to damp proof basements and cellars.

We use two different methods to do this, one being the slurry tanking method and one being the cavity drainage system however sometimes there may be a need to integrate both methods for the best results.


The slurry tanking method we use involves Safeguards K11 slurry. The slurry is a cementitious compound which is resistant to the salts that are left behind when external moisture gets into the interior of a property. The slurry is applied to walls and floors to create a waterproof barrier, stopping moisture being able to ingress. The slurry bonds to the walls and floors and block the moisture from getting in, once dry it forms an impermeable barrier which keeps the moisture out.


The cavity drainage system that we use for tanking involves using membrane which are dimpled to allow moisture to drain away behind them. The membranes are made from a polythene material and are of a high density making them perfect for use in tanking. We use fixings, plugs and waterproof finishing’s to ensure the surface is water proof and impermeable to moisture.


A sump pump is installed to drain away the moisture behind the tanking membranes. When you have a sump-pump installed it is important to have this serviced annually to ensure it keeps functioning correctly.


Both tanking methods mentioned above are excellent methods to waterproof sub-floor living spaces. Once the tanking has been completed using a method deemed suitable for your particular property and the plaster and/or coatings have been allowed to dry you will have a damp free living space. You may wish to renovate a basement or cellar to allow yourself more room or you may wish to rent the area out and make extra income.


We hope that we have answered the question of why would you need tanking however if you are unsure or would like us to come and have a look at your basement or cellar drop us an email on info@dhdamplondon.co.uk or call us on 0203 627 9798.

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