https://www.repairmywindowsanddoors.co.uk/nottingham-guttering-and-downpipes-near-me/ Repairing Leaks From Cast Iron Downpipe Joints Leaks from cast iron downpipe joints can be a major issue. They can cause water damage and encourage mould and mildew growth. Fortunately they can be fixed. However, first you'll have to remove the pipes of any paint or rust using a wire brush. After the pipes have been cleaned, you'll need to assess the extent of the damage. Caulking While caulking isn't a permanent fix, it's often enough to stop further damage and keep the rainwater flowing. Most hardware and home improvement stores offer mortar caulking. It's used to seal gas in bricks, stone and metal, repairing fissures in basements and foundations and preventing leaks around doors and windows, and it can also be applied to cast iron pipe joints. Before applying caulk, clean out any paint or rust that has escaped. If you need to, use a wire brush or scraper to remove the paint or rust. Be careful not to cut or scratch the pipe. You should also wear gloves while working with caulking as the chemical compound may irritate your skin. First prepare the area for application of caulk by cleaning it using a scraper or wire brush to get rid of any rust or debris stuck to the pipe joint. Masking tape can be placed on either side of the area to ensure clean lines when applying the caulk. Additionally, the edge of the caulk tube needs to be cut at 45 degrees. Then, load the caulk gun with a bead of the compound and apply it to the joints or gaps you wish to repair. It is important to employ a caulking tool that has a constant speed and pressure in order to apply a smooth, even bead. It is recommended to wait at minimum six hours after applying the caulking before using the downpipe. This will allow the caulking to completely dry and create a a durable seal. Although most people can perform some work themselves to maintain their gutters and downpipes to leave the most extensive repairs to pro