Soldering has been a common practice in roofing trade. It is done to create a water proof seam and also to ensure water tight joints. Soldering can be a bit tricky for those who are starting as they try to maintain professionalism and this may make these beginners to frown as the practice seems difficult. Therefore, it is important to acquire some skills by learning some tips for soldering. The following are some soldering tips that you require to have knowledge on before starting to solder.
1. It is extremely important to clean the material for you to solder properly. This is important as solder will not attach to oxides. This explains the reason for cleaning the material you are using. Use a brush to clean the metallic material you are soldering and clean on both sides that you want to solder.
2. For longevity of your work it is important to pre-tin your joints. Pre-tinned then soldered joints have been proven to be stronger than those that have not been pre-tinned. Pre-tinning before lapping your sheets allows solder flow to adhere to 4 layers of copper but if it is not pre-tinned the solder flow will only adhere to 2 layers. This explains why copper soldering roof roofing shingles is pre-tinned.
3. Do not re-solder a broken seam. Moisture and dirt over time usually enters in a broken joint solder, and this leads to reaction that causes oxidation of the solder, thus any attempt to re-solder will just make the joint weak and that will be a bad idea.
4. A few materials used that will solder just easily as copper include: Zinc can be soldered though it has relatively low melting point and there are particular flux such as express zinc flux that work best with zinc. Stainless steel and aluminum can also be soldered but they require their own unique flux as they have oxides. Galvanized steel can be soldered when the zinc coating is removed. Lead coated copper can also be soldered.
5. The material soldered is the one that determines the type of flux to use. Soldering flux prevents oxidation of metal and that can cause poor adherence of the solder. Thus it is important to look for the right flux for the metal.
6. When using propane soldering iron it is important to turn down the iron heat when the temperatures are enough to melt the solder, this preserves the copper tip life.
These tips will enable you to improve your skills on soldering.
If you are referring to specialists, then the option of soldering copper roofing is chosen according to the amount of work and equipment access. There are two options for doing this operation:
• high temperature at operating mode 720 ° C. Carried out with an oxygen-acetylene burner using copper-phosphorus solder (phosphorus – 6%);
• soldering with low-melting solder at a temperature of 450 ° C. It is carried out with a soldering lamp and a soldering iron hammer with a mass of 0.5 kg. A low-melting tin-copper solder (copper 3%) with flux (DIN EN 29454-1) is used.