Pakistan is hard on pipes at both ends of the year. In summer, a water line crossing a sunny roof can heat the water in it so much that cold taps run warm. In winter in the north, pipes outside can freeze and crack. Water pipe insulation fixes both, and it also stops cold pipes from sweating in humid weather.

Where water pipe insulation helps most

• Roof water tanks and the lines from them. This is the most common case in Pakistani homes. Insulate the pipe that leaves the tank and the exposed run to the stairs.
• Hot water lines from a geyser. Insulation keeps the water hot longer and saves gas or electricity.
• Pipes in cold areas. Insulation slows freezing. In severe cold you may also need heat tracing.
• Cold pipes inside a building. They sweat in humid air, so insulation protects ceilings and walls.

Pipe material matters less than you think

GI, PPR, CPVC and copper all lose and gain heat. The difference is that metal conducts heat faster than plastic, so a bare copper or GI pipe warms or cools quicker. All of them benefit from insulation.

Which insulation to use

Compare the options in more detail in our guide to NBR foam, EPS and glass wool, or read about thermopore pipe insulation. If you also have a split AC, see AC pipe insulation for the copper lines.

How thick?

General guidance from common manufacturer and supplier practice. Large or industrial lines need a proper recommendation.

Protect it from the sun

Foam breaks down under strong sun. On a roof, wrap the insulation in aluminium foil, UV-resistant tape or a metal or PVC cover. Without this, a good insulation job can crumble within a couple of seasons.

Installation tips

1. Fix leaks first. Wet insulation does not work.
2. Clean and dry the pipe.
3. Fit the insulation along the whole run, including elbows and valves.
4. Seal every joint with tape.
5. Cover outdoor sections.

Frequently asked questions