https://www.repairmywindowsanddoors.co.uk/rickmansworth-guttering-and-downpipes-near-me/ Repairing Leaks From Cast Iron Downpipe Joints Leaks at the cast-iron joints of downpipes can cause a source of concern. They can cause water damage and promote mold and mildew growth. Fortunately, these pipes can be repaired. You'll first have to use a wirebrush to get rid of any rust or paint from the pipes. Once the pipes have been cleaned, you'll need to determine the extent and nature of damage. Caulking Caulking isn't permanent It can, however, be used to stop further damage and to keep rainwater flowing. It is available at most hardware and home improvement stores. It is used to seal gas pockets in bricks and stones as well as metals as well as repair foundations and fissures and prevent leaks around windows and doors. Before applying caulk, remove any rust or paint that is loose. If needed, you can use a wire brush or scraper to remove the paint or rust. Be careful not to cut or scratch the pipe. Also, you should wear gloves while working with caulking as the chemical compound can cause irritation to your skin. First, prepare the area for application of caulking by cleaning it with a scraper or wire brush to remove any debris or rust that's stuck to the pipe joint. Masking tape should be positioned on either side of the area for clear lines to be used when caulking. The end of the tube of caulk should be cut at 45 degree angles. Then, fill the caulk gun up with a small amount the compound. Apply it to the gaps and joints you wish to repair. It is important to apply a caulking device with constant speed and pressure in order to apply a smooth, even bead. At minimum six hours after applying the caulking prior to applying the downpipe. This will allow the caulking to dry completely and create a durable seal. While most people can do little work on their own to maintain their gutters and downpipes, it's recommended to leave any extensive repairs to professionals who will del