https://www.repairmywindowsanddoors.co.uk/cambridge-guttering-and-downpipes-near-me/ Repairing Leaks From Cast Iron Downpipe Joints Leaks from downpipe joints made of cast iron can be a major issue. They can cause water damage and promote mould and mildew growth. Fortunately they can be fixed. But first you'll need to clean the pipes of any paint or rust using wire brushes. Once the pipes are clean you'll have to determine the extent of the damage. Caulking While caulking isn't an all-time solution, it's usually enough to prevent further damage and keep rainwater flowing. of hardware and home improvement stores carry mortar caulking. It is used to seal gas leaks in bricks and stones as well as metals, repair fissures and foundations and stop leaks around windows and doors. When you use caulking, make sure to get rid of any paint or rust from the area before applying the new sealant. You can make use of a wire brush or scraper to accomplish this, but be careful not to cut or scratch the pipe itself. It is also recommended to wear gloves when working with caulking as the chemical compound may irritate your skin. First prepare the area for the caulking application by cleaning it with a wire brush or scraper to get rid of any rust or debris stuck to the pipe joint. Masking tape should be positioned on either side of the area for clean lines to be applied when caulking. The end of the tube of caulk should be cut at 45-degree angles. Then, you can load the caulk gun using a tiny amount of the compound and apply it to the gaps or joints you wish to repair. It is important to apply a caulking device with regular speed and pressure in order to apply a uniform, smooth bead. Wait at minimum six hours after applying the caulking before applying the downpipe. This will allow the caulking to completely dry and provide a strong, lasting seal. Although most people can perform a small amount of work on their own to maintain their guttering and downpipes, it's recommended to leave an