https://www.repairmywindowsanddoors.co.uk/whitstable-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 mold and mildew growth. Fortunately they can be fixed. You'll first have to use a wirebrush to remove any rust or paint off the pipes. Once the pipes have been cleaned, it is time 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 ensure that rainwater is flowing. Most hardware stores and home improvement stores offer mortar caulking. It is used to seal gas in stone, bricks and metal, repairing fissures in basements and foundations and sealing leaks around windows and doors, and it can also be used to seal cast iron pipe joints. When you use caulking, be sure to get rid of any paint or rust from the area prior applying the new sealant. If necessary, you can employ a scraper or wire brush to get rid of the paint or rust. Be careful not to scratch or cut the pipe. Wear gloves when working with caulking because the chemical compound may cause irritation to the skin. First, prepare the area for the application of caulk by cleaning it using a wire brush or scraper to remove any debris or rust that's stuck to the pipe joint. Masking tape should be placed on either on either side of the joint to ensure clean lines to be applied when caulking. The end of the tube of caulk should be cut at 45 degree angles. Then, load the caulk gun with a bead of the compound and apply it to the gaps or joints you wish to repair. When using a caulking gun, you must be consistent with your speed and pressure. apply an even, smooth layer of the compound to the joints or gaps. Once you've applied the caulking ensure that you wait at minimum six hours before you use the downpipe once more. This allows the compound to completely dry and provide a an extremely durable, long