https://www.repairmywindowsanddoors.co.uk/corby-guttering-and-downpipes-near-me/ Repairing Leaks From Cast Iron Downpipe Joints Leaks at the cast iron joints of downpipes can be a source of concern. They can cause water damage and encourage the growth of mould and mildew. Fortunately they can be fixed. First, you'll need a wirebrush to remove any paint or rust from the pipes. After the pipes have been cleaned, you'll need to assess the extent and severity of damage. Caulking Although caulking isn't a long-lasting fix, it's often sufficient to stop further damage and keep the rainwater flowing. Most hardware and home improvement stores offer mortar caulking. It is used to seal gas in bricks, stone and metal, repairing cracks in foundations and basements, stopping leaks around windows and doors, and it can also be used to seal cast iron pipe joints. Before applying caulk, clean out any loose paint or rust. If needed, you can use wire brushes or scrapers to get rid of the paint or rust. Be careful not to cut or scratch the pipe. Wear gloves when working with caulking because the chemical compound can irritate the skin. First, prepare the area for application of caulk by cleaning it using a wire brush or scraper to remove any rust or debris stuck to the pipe joint. Masking tape can be put on either side of the joint to ensure clean lines when applying the caulk. Additionally, the end of the caulk tube should be cut at a 45-degree angle. Then, fill the caulk gun with a bead of the compound and apply it to the gaps or joints you'd like to repair. When using a caulking gun you must be consistent with your speed and pressure. apply an even, smooth bead of the compound to the joints or gaps. After you've applied the caulking take at minimum six hours before you use the downpipe again. This will allow the compound to completely dry and create a a durable seal. Although most people can do some of the work themselves in order to maintain their gutters and downpipes it is recomm