Better still (and much cheaper!) use 'Sifcupron' which is specifically designed for brazing copper & is self fluxing on copper to copper joints.cncbasher said:just silver solder , use propane & easyflo 2 solder with flux , much cheaper and easier than welding , before soldering (or welding )pickle the copper in a reduced mix of sulphuric acid and distilled water ( 1 part battery acid with 4 parts distilled water) then rinse under water before soldering
Cob. are you in the forum police?
Why have you been treating your roof with yoghurt? Is there something you want to share with us Alex?