On 05/11/14 14:12, David wrote:

Gotchas about capping chimneys?

Use a nice simple strap on cap with vent mesh - often called a "pepper
pot". These come with basically a ginormous jubilee clip that you do up
until it won't fall off.

Available painted red so look OK. eg:

http://www.gasproducts.co.uk/acatalo...mney_Cowl.html

You may also find a HETAS installer or a chimney sweep may be more adept
at going up the roof without scaffold - depending on access and height.

I got 2 capped when I had a flue liner put in.