Skip to main content

Climaflex Pipe Insulation

Climaflex polyethylene pipe insulation is probably the best place to begin a discussion on pipe insulation. it is a grey, closed cell, polyethylene foam and widely available online and from DIY centres and plumbers merchants.

Polyethylene tends to be the cheapest insulation around, but that does not make it a poor quality product. It has a good thermal conductivity (0.034W/m.K @ 0ºC) comparable with nitrile rubber making it a good material for central heating pipes and frost protection applications. The material itself is not UV stable, so it is not advisable to use it out of doors but it has a closed cell structure so it does not absorb water, or at least it will not unless it is left in a body of water for an extended period. If you do use it outside the material is likely to degrade much quicker than normal, a time scale is difficult to predict dependent on how much sun the product gets, but it would certainly need replacing within 2-5 years.

In terms of application, most people would find it easy enough to do. You would need a sharp knife, a contact based neoprene adhesive (one where you apply a small small amount to either face to be joined and allow it to "tack dry" before joining the material together) and a steady hand. The material comes in 1m or 2m lengths and is relatively flexible, more so at thinner wall thickness's. It can go around most shallow bends, but for angles you would need to cut it with a mitre block or similar. The below video gives a more visual insight into how the material is installed:

Thinking in terms of what thickness to use, invariably the thicker the better. The material comes in 9mm, 13mm, 19mm and 25mm Thickness's. 9mm & 13mm tend to be used for domestic central heating pipes, they are cheap and effective for this kind of application. For frost protection, Water Bylaw 49 (UK) states that the thinner the pipe, the thicker the insulation is required. A brief table of pipe sizes and required thickness's is given below.

Pipe Dia O/D (mm)
Normal Conditions

The above refer to a normal home environment in an insulated loft space, where absences over 24 hours would not be considered normal.

If you are looking for energy conservation, the Energy Savings Trusts recommend 25mm Thick on 15mm, 22mm, 28mm and 35mm diameter pipes for maximum efficiency.

The product has a temperature range of -45ºC to plus 105ºC, although it will begin to soften around 90ºC. This is more than adequate for the majority of domestic applications. 

For more information on the complete range of sizes and clips, tapes and adhesives to match, plese visit:


  1. Could Climaflex be used in a commercial building (school) for insulating small bore hot & cold water pipes within boxings.There is minimal space available within the boxing and 9mm is being considered for 22 & 15 copper pipe.Would this be effective in preventing heat loss or heat gain to the cold water service?

  2. Unfortunately you would not be able to use this product for a commercial building, as you would need a Class 0 fire rating to comply with the building regulations. 9mm of insulation is not what you would ideally want, and may not be adequate if you are required to comply with BS5422, but in these instances it is better to have thin insulation than no insulation at all. You may want to look at some of our Class 0 Pipe Insulation products such as Eurobatex or K Flex online at You are very welcome to give us a call on (01942) 295 926 if you need further advice.

  3. Can climaflex be used in lieu of ducting to lay copper ch pipes in concrete?

    1. Climaflex can be used to protect the pipes under concrete, though it must be properly sealed using the appropriate adhesive at all seams and butt joints:

  4. Good information shared about Climaflex Pipe Insulation.


Post a Comment

Popular posts from this blog

The Beginners Guide to Pipe Insulation: Flexible Foams

Next up in the series we are doing on pipe insulation is "flexible foams"; a category that includes polyethylene and expanded nitrile rubber.

Polyethylene Pipe Insulation
Climaflex pipe insulation is the UK's leading brand for polyethylene pipe insulation. This is the grey foam that most people are familiar with, the kind you would traditionally find in garden centres for example. Polyethylene is the cheapest, widely available product in the market. People very often wrongly assume cheap means poor quality, this is not the case with a brand such as Climaflex. It has a thermal conductivity of 0.034 W/m.K at 0°C which is broadly equal to that of any other flexible foam, and it also has a much higher "μ factor" than other foams, making it more resistant to moisture ingress. These facotrs make it ideal for use around the home, being easy to work with and providing good insulation. 
The material can be purchased in 1m and 2m lengths, and is available in wall thicknesse…

The Beginners Guide To Pipe Insulation: Getting to grip with the basics

Our Beginners Guide series of blogs will look at the common areas of pipe insulation lagging that you will want to look at when choosing your product. This guide will be of most interest to the DIY installers, but some of our later guides will cover more complex products and areas of application.

One of the things we get asked about a lot is what the dimensions quoted for pipe insulation actually mean. You will always see three measurements quoted when describing pipe insulation; Wall Thickness, Bore Size and Length.

In the below diagram, A is the "Bore" and B is the "Wall".

Wall thickness is very simply how much insulation you have; so for example if you have 13mm Wall pipe insulation, then that means you have 13mm of insulation on either side of your pipe. This thickness is very often one of the most important part of your decision; too thin and you might not get the results you are looking for but too thick and it might not fit between your pipe and the wall.


Frost protection for domestic pipes

With the cold weather approaching we thought it would be a good idea to touch on how best to protect your pipes from frost this winter.

When dealing with frost protection on pipes inside a building your aim with insulating them is to delay the onset of freezing for as long as possible; it is not possible to guarantee a pipe will not freeze by insulation alone. The better the insulation, and the thicker the insulation, the longer you will give yourself. Under normal circumstances you aim to give yourself about 8-10 hours protection against sub zero temperatures. With pipes inside a home this is usually long enough to be sure the pipes will not freeze.

Ice formation inside the pipes will lead to an increase in pressure. As the water tries to flow this pressure will increase, and eventually will lead to the pipes bursting. A burst pipe can cause a lot of problems, not least of which is a lot of damage to your property and a lot of expense incurred.

Water regulations state that all water …