How to seal around pipes

One of the most common reasons for drilling through walls is to feed pipes out from a bathroom or kitchen, or to feed condensate pipes outside from your boiler. Once the correctly sized hole is drilled (commonly for waste and soil pipes 52mm and 152mm), using a core drill, the pipe can be pushed through.

It is very important however to make sure any holes left around a pipe in the brickwork or masonry are sealed properly.

You must seal a hole around a pipe to:

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The most effective and easiest way to seal around pipes and to stop all of these problems is to use PipeSnug. Invented by a builder who was fed up of mess and hassle, PipeSnug can be fitted externally and internally, giving a smart finish, quickly. You don’t need to mix mortar or use silicone and it can be fitted in less than five seconds.

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PipeSnug simply fits into the hole you have drilled for the pipework and comes in 32mm, 40mm or 110mm sizes. PipeSnug pipe seals are available to buy online and in store from Screwfix and many other retailers across the UK. They can be installed in any weather, do not perish and give a really smart finish. It is a very professional, cost effective way to make the exterior of a building look smart and aesthetically pleasing.

Installation is quick, easy with no mess:


If you don’t seal around the pipe, you are not maintaining the thermal integrity of the building. With harsh winter weather in the UK now becoming the norm, it is really important that you treat the outside of the property like a ‘skin’ and make sure it is sealed to make it as thermally efficient as possible. If holes are not sealed, then heating bills may rise as wasted energy escapes or is used trying to heat the building. Part L of the Building Regulations covers energy efficiency and sets the benchmark for the installation standards expected in the UK.
Before PipeSnug was invented, pipes extruding from buildings were sealed using mortar and also silicone adhesives. This takes time and a lot of effort. Mortar has to be mixed up and can really only be used in dry weather. The ‘finish’ mortar provides isn’t the best either, especially if the job is rushed. Although mortar is tough, it is not immune to weathering and can crack and come away, leaving the cracks open to insects, drafts and water damage. Similarly, silicone sealant can also weather, fall away and the finish is not ideal too.

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Mortar looks poor and weathers
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Silicone weathers, shrinks and can fall out, leaving the hole exposed

Remember, it is also desirable to seal the hole internally too – but many installers or DIYers just don’t do this.

PipeSnug is the best way to seal around a pipe both inside and outside the house.

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