Waterproofing An Existing Cellar

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Waterproofing an existing cellar

As with many Victorian properties in Cambridge, converting the damp cellar into a usable waterproof room is a great way to increase the habitable space within a property. Within this post, we’ll go through what APP did to solve our client’s basement waterproofing problem

Cellar Waterproofing From The Experts

APP was asked to conduct an inspection to provide an estimate for a suitable waterproofing solution.

APP specified and installed a cavity drain membrane system with a sump pump.

The system uses extruded HDPE membrane with 8mm studs for wall application and 20mm over the floor, which allows water and vapour to move in all directions across the whole of the wall and floor surfaces, thereby achieving damp pressure equalisation.

Drainage channels set within the floor collect any water ingress where it is directed to the sump station and removed to the external drainage.

Finishing The Waterproofing

APP’s carpentry team screwed treated timber battens to the walls, followed by plasterboard and laid a floating timber floor, new skirting boards were then fixed to the walls.

APP also installed insulation between the ceiling joists and a plasterboard ceiling.

The cellar is now a much-improved space and asset to the property which the client was very pleased with.

Cellar Waterproofing Summary

  • APP was asked to inspect a property and provide an estimate for a suitable waterproofing solution.
  • APP specified and installed a cavity drain membrane system with a sump pump.
  • The system uses extruded HDPE membrane with 8mm studs for wall application and 20mm over the floor, which allows water and vapour to move in all directions across the whole of the wall and floor surfaces, thereby achieving damp pressure equalisation.
  • Drainage channels set within the floor collect any water ingress where it is directed to the sump station and removed to the external drainage.
Cellar Waterproofing

What waterproofing options are available for an existing cellar 

Waterproofing your cellar is a great way to prevent water damage and mould growth in your home. There are a few different options available, depending on the extent of the waterproofing needed. For minor waterproofing, you can apply a waterproof sealant to the walls and floor of the cellar. This will create a barrier against water, but it won’t necessarily stop water from getting in. 

For more extensive waterproofing, you can install a drainage system or sump pump. This will help to redirect water away from the cellar and keep it dry. Finally, you can also waterproof the outside of the cellar by excavating around the perimeter of the house and installing a drain tile system. This will catch any water that flows down the foundation and redirect it away from the cellar. 

With any of these options, it’s important to consult with a professional before starting the project to ensure that it’s done correctly.

Waterproofing an existing cellar

The benefits of waterproofing your cellar

Waterproofing a cellar helps to keep the space dry, preventing the growth of mould and mildew. It also helps to keep insects and other pests out, as well as helping to insulate the space. Installing an effective waterproofing system can also help to reduce energy bills, as it will help to keep the space cooler in summer and warmer in winter. In addition, a dry and liveable cellar can help to increase the value of your home. Taking steps to waterproof your cellar is a relatively simple and straightforward process, and it can make a big difference to the overall condition of your home. If you are considering any structural waterproofing, please don’t hesitate to contact us for more information.


How to choose the right waterproofing solution for your home 

If your home has a cellar, you know how important it is to keep it dry. A wet cellar can lead to all sorts of problems, including mould growth and structural damage. The good news is that there are many different cellar waterproofing solutions on the market. But with so many choices, how do you know which one is right for your home?

Here are a few things to keep in mind when choosing a cellar waterproofing solution:

Installing Insulation

Do You Have Severe Water Ingress?

The severity of your moisture problem. If your cellar is only slightly damp, you may be able to get by with a simple sealant. However, if your cellar is chronically wet, you’ll need a more robust solution like full-scale waterproofing.

How Is Your Home Built?

The type of construction of your home. Older homes with stone foundations may require a different type of waterproofing than newer homes with poured concrete foundations.

What Is Your Budget?

Your budget. Waterproofing solutions can range from relatively inexpensive do-it-yourself products to costly professional services.

By keeping these factors in mind, you can narrow down your choices and find the best cellar waterproofing solution for your home.

People laying concrete foundations

What kind of maintenance is required to keep a cellar waterproofed

Waterproofing an existing cellar can be a daunting task. Waterproofing is essential to keeping your basement or crawl space dry and free of water damage. There are several different ways to waterproof your cellar, but the most common method is to apply a waterproof coating to the walls and floors. This coating will create a barrier that will prevent water from seeping through the cracks and joints in your basement or crawl space. 

Waterproof coatings are available in both latex and rubber-based formulas and can be applied with a brush, roller, or sprayer. If you are waterproofing an existing structure, it is important to repair any cracks or holes in the foundation before applying the waterproof coating. Once the waterproof coating has been applied, you should also install a drainage system to collect any water that does accumulate and divert it away from your home. 

By taking these precautions, you can help to keep your cellar dry and free of water damage.

How to deal with water infiltration if it does occur 

Water infiltration can be a serious problem for any homeowner. If left unchecked, it can lead to structural damage, mould growth, and even health problems. However, there are a few simple steps that you can take to deal with water infiltration if it does occur. The first step is to find the source of the problem and repair it. This may involve repairing cracked walls or replacing missing shingles. Once the source of the problem has been fixed, you can then take steps to prevent future water infiltration. This may involve installing proper drainage around your home and ensuring that gutters and downspouts are in good working order.

Waterproofing Brickwork

Additional tips and advice on waterproofing an existing cellar

There are a few additional tips and pieces of advice to keep in mind when waterproofing an existing cellar. First, make sure that any cracks or holes in the walls or floors are properly repaired before beginning the waterproofing process. Second, investigate the source of any water leaks and repair them as well. Third, it is important to apply a sealant evenly and thoroughly in order to achieve the best results. Finally, be sure to check the cellar regularly for any new leaks or damage and address them promptly.

However, if you are not completely confident undertaking a task of this size then it is always recommended to reach out to an experienced and trustworthy waterproofing company. APP has been successfully providing waterproofing solutions to homes and properties throughout Cambridgeshire for over 50 years! 

So, if you’re dealing with water infiltration in your cellar, don’t worry – there are waterproofing solutions available that can help. Feel free to contact us to learn more about the options we offer and how we can help you keep your cellar dry. Thanks for reading!


Cellar Waterproofing FAQs

What are the benefits of waterproofing an existing cellar?

The benefits of waterproofing an existing cellar include: improved air quality, increased energy efficiency, a healthier living environment, and better storage optimisation. This can also lead to improved resale value in the future. 

How do I waterproof my existing cellar?

To waterproof your existing cellar you may need to install a sub-floor membrane and ensure that all walls and floor surfaces are properly sealed. You will also need to make sure that gutters outside the building are working properly and that any water is redirected away from the foundation of your house. However, there are numerous waterproofing systems that can be designed. 

Can I do the waterproofing myself?

In some cases, homeowners can complete simple DIY waterproofing jobs, however, it’s best to consult with a professional before starting work as they will be able to identify any potential issues or problems with the job.

Are there any long-term maintenance costs associated with waterproofing an existing cellar?

It’s important to keep in mind that while some waterproofing jobs are one-off projects, other methods may require regular maintenance such as checking for leaks and ensuring gutters remain clear of debris. For more information on any particular project, it’s always best to consult a professional structural waterproof engineer.

We’re Ready To Help You

Please get in touch with our friendly team today and we can get the ball rolling on your project sooner than you think.

01223 244 515