creaking pipes

[waggonway]

My heating system has started creaking. It starts as soon as the pump kicks in and then some of the rads and pipes tick as it heats and cools.
Worcester combi boiler and the system is about 7 years old. Have bled the system till I am blue in the face, not a lot of air. Is this just a problem with the pipes running through the joists? Or can I cure it by upping the inhibitor concentration?

 

[clf-gas]

Expansion noise.

One of mine does it and Im an installer

 

[waggonway]

I take it there is no way round it?

 

[JohnD]

it's probably a pipe rubbing on a notch in a joist. If you ease the notch and wrap the pipes in felt they can slide without noise.

If its a radiator (more often a ticking noise) there is a plastic thing you can put on the brackets.

I bet if someone was paying CLF he'd fix it for them

 

[gas4you]

I always use tubular hairfelt around all my pipes that cross joists or risk touching anything.

 

[clf-gas]

bet if someone was paying CLF he'd fix it for them

You know how it is John

 

[waggonway]

Well I guess the floor boards are coming up then because the noise is enough to disturb my beauty sleep and God knows I need it.

 

[clf-gas]

When you put the boards back down use screws so the dont creeck.


Dont go through the pipes

 

[JohnD]

...my beauty sleep and God knows I need it.

pictures please (before and after)