Insulation
Insulation for heating and water pipes starts with three details: internal diameter, insulation thickness and installation method. A hose with a 54 mm internal dimension does not fit a 22 mm pipe, and a 9 mm wall performs different tasks than 20 mm insulation. This category therefore shows when closed-cell polyethylene foam, self-adhesive sections or aluminium-coated stone wool is the better choice.
Choosing the right pipe insulation for the task
Pipe insulation serves several purposes in plumbing and heating. It reduces heat loss from heating pipes, prevents condensation on cold-water pipes and protects pipes in unheated areas against frost. The pipe's outer diameter is the first deciding factor: a Ø 22 mm insulation hose belongs on a 22 mm pipe, while a Ø 42 mm hose belongs on a 42 mm pipe. The second number indicates the thickness of the insulating layer. A 13 mm version remains slim, while 20 mm or 25 mm forms a thicker layer around the pipe.
The products in this category follow a clear pattern. Classic CLIMAFLEX hoses are made of foamed, closed-cell polyethylene and are specified for heating and plumbing. XT versions have a self-adhesive cutting edge on both sides. Stone-wool pipe insulation with an aluminium coating is intended for heating pipes. A mitre box is also included for cutting bends and T-pieces.
Polyethylene foam
Closed-cell PE hoses are flexible and available pre-slit or self-adhesive. The data sheet for a 54 mm version with 20 mm insulation lists a closed-cell PE structure with condensation and frost protection, plus pre-slit installation.
Stone wool with aluminium
The 22 x 20 mm stone-wool version is 1 m long, aluminium-coated and specified for heating pipes. Its coating is a visible feature for areas where a mechanically durable surface is needed.
Self-adhesive XT section
According to the product data, XT hoses have a self-adhesive cutting edge on both sides. This closes the seam along the section without additional adhesive tape for that step.
Reading diameter and insulation thickness correctly
The measurement Ø 54 mm x 13 mm means a 54 mm internal diameter and a 13 mm insulation thickness. The outer diameter of the insulated pipe calculates to approximately 80 mm. This calculation helps in tight ducts, penetrations and curves. The same applies to Ø 35 mm x 13 mm, Ø 42 mm x 13 mm and Ø 60 mm x 13 mm.
- Ø 22 mm: common on slim plumbing pipes; versions are available with 13 mm, 20 mm and 25 mm insulation.
- Ø 28 mm: also a slim size; the range extends from 13 mm through 20 mm to 25 mm.
- Ø 35 mm: a widespread intermediate size; available with a 9 mm, 13 mm or 20 mm layer.
- Ø 42 mm: often used on heating and plumbing pipes; versions range from 9 mm through 13 mm to 25 mm.
- Ø 54 mm and Ø 60 mm: larger pipes; listed versions show a 9 mm, 13 mm or 20 mm insulating layer.
Narrow installation spaces, shorter routes and generally lower material use favour thin walls. Thicker walls provide more material around the pipe but require more space. Where a pipe runs through a wall penetration with little clearance, measure the space around the pipe first. For new routes, the required outer width can be planned more easily.
Material selection for heating, plumbing and heating pipes
For heating and plumbing applications, the product data repeatedly names foamed, closed-cell polyethylene from NMC Naturefoam. Some CLIMAFLEX products state at least 50 percent renewable raw materials, and a 54 mm hose with a 20 mm insulating layer also states CO₂-neutral. These statements relate to individual products and should not automatically be applied to every variant.
Aluminium-coated stone wool is a second option. The data sheet for the 22 x 20 mm version describes 1 m long stone-wool pipe insulation with a robust aluminium coating, intended for heating and domestic hot-water pipes. Anyone seeking a uniform black surface will also find rubber products such as AEROFLEX SH or INSUL-TUBE H PLUS. Their names refer to closed-cell foam rubber, flexibility and black as the colour.
The decision can be structured as follows:
- First measure the pipe's outer diameter and look for the matching internal dimension.
- Then check the available width around the pipe and derive the maximum insulation thickness.
- Next compare application, material specification and installation method.
- Finally plan bends, T-pieces, valves and straight runs separately.
Installation: pre-slit, self-adhesive or cut to size
Pre-slit hoses can be placed over the pipe and then closed. Self-adhesive XT versions have a self-adhesive cutting edge on both sides; their data sheet describes fast, clean handling. This construction is especially practical for retrofitting accessible pipes because the section does not need to be pushed over an end.
Straight runs can be installed in metre sections. Several products are described as 2 m sections and divided into two 1 m pieces. Product pages state this directly and explain why two sections arrive instead of one continuous section. For corners and fittings, the range includes a red plastic mitre box. Its description says it is used to cut bends and T-pieces from pipe insulation and supports precise cuts.
Distinguishing insulation mats, pipe insulation and accessories
The term pipe insulation describes the actual covering around a pipe. An insulation mat is a flat format better suited to level surfaces than to round pipe runs. Product shape therefore matters: insulation hose, insulation tube, mat or sheet perform different geometric tasks.
Accessories complete the installation. The mitre box helps cut angles and branches. Adhesives and tape appear in other products in this category. Material, adhesive and surface must match: a PE hose with a self-adhesive seam needs no separate closure for that seam, while pre-slit versions may be fixed differently according to their instructions.
Comparison of the main versions
| Version | Thickness | Installation | Especially suitable for |
|---|---|---|---|
| Ø 22 / 28 mm | 13–25 mm | pre-slit or self-adhesive | slim plumbing and heating pipes |
| Ø 35 / 42 mm | 9–25 mm | pre-slit or self-adhesive | common heating and plumbing pipes |
| Ø 54 / 60 mm | 9–20 mm | pre-slit or self-adhesive | larger pipes with sufficient space |
| Stone wool ALU | 20–40 mm | metre piece | heating pipes with a durable aluminium surface |
A comparison based only on insulation thickness is not enough. Two products of equal thickness can differ in materials, surfaces and installation systems. Length per pack also varies: there are 1 m sections, 2 m sections and packs containing two 1 m pieces.
Frequently asked questions about insulation
Which diameter should I measure?
Measure the pipe's outer diameter. The first number in the insulation specification must match that value. Ø 22 mm is therefore intended for a 22 mm pipe and Ø 42 mm for a 42 mm pipe.
What does Ø 42 mm x 13 mm mean?
The insulation hose has a 42 mm internal diameter and a 13 mm thick insulating layer. This creates additional space around the pipe that you should allow for in ducts and with spacers.
When is self-adhesive useful?
XT versions have a self-adhesive cutting edge on both sides. This helps when an installed pipe is to be covered and the seam along the section closed.
Why do two 1 m sections arrive instead of 2 m?
Several product pages point out that 2 m sections are divided into two pieces of 1 m each. The product descriptions state this explicitly.
How do I cut bends and T-pieces?
A mitre box is available for fittings. Its description covers cutting bends and T-pieces from pipe insulation. Cut fittings first, then straight runs.
How do PE and stone wool differ?
PE hoses are flexible plastic-foam products for heating and plumbing. The listed stone-wool version is aluminium-coated, 1 m long and specified for heating and domestic hot-water pipes.
Matching categories and related components
Flat formats for level tasks rather than round pipe runs. Pipe insulation
Hose and pipe formats sorted by material and application. Pipe insulation systems
Further versions for heating, plumbing and water pipes.
Anyone planning a pipe system completely often also needs connections, shut-off fittings or measuring technology. These neighbouring areas help assemble the pipe network, control and connection points in the same project:
- Fittings + PE Pipe Unions for threaded unions in PE pipe systems
- Threaded fittings for thread-based connections
- Ball Valves, Socket Valves and Shut-off Valves for isolating pipes
- Brass Connectors for brass connections
- Measurement, Control & Filtration for measuring, control and filtration tasks
- IBC Accessories + Tank Glands for tank connections and accessories
With these components, insulation can be matched to the actual pipe: confirm the internal dimension, check the available width, select material and installation method, then cut fittings and straight runs. This keeps the selection traceable and consistent with the information on each product page.