https://www.repairmywindowsanddoors.co.uk/dunstable-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 promote the growth of mould and mildew. Fortunately they 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 are cleaned, you will need to assess the extent and nature of damage. Caulking Caulking isn't a permanent solution It can, however, be used to prevent further damage and to keep rainwater flowing. It is available in a wide variety of hardware and home improvement stores. It's used for sealing gas in stone, bricks and metal, repairing fissures in basements and foundations as well as sealing leaks around doors and windows, and it can also be applied to cast iron pipe joints. If you are using caulking, ensure that you remove any loose paint or rust from the area before applying the new sealant. You can make use of scrapers or wire brushes to do this if necessary, but be careful not to cut or scratch the pipe. You should also wear gloves while working with caulking because the chemical compound could cause irritation to your skin. First prepare the area for caulking application by cleaning it with a wire brush or scraper to remove any rust or debris that's stuck to the pipe joint. Masking tape is placed on either side of the joint to ensure clear lines when you apply the caulk. Additionally, the tip of the caulk tube must be cut at a 45-degree angle. Then fill the caulk gun up with a small amount of the compound. Apply it to the gaps and joints you wish to repair. You should employ a caulking tool that has a constant speed and pressure to apply a smooth, even bead. It is recommended to wait at least six hours after applying the caulking before using the downpipe. This will allow the caulking to dry completely and create an impervious seal. While most people can do a sm