https://www.repairmywindowsanddoors.co.uk/chingford-guttering-and-downpipes-near-me/ Repairing Leaks From Cast Iron Downpipe Joints Leaks at the cast-iron joints of downpipes can be a problem. They can cause water damage and promote mould and mildew growth. Fortunately they can be fixed. However, first you'll have to clean the pipes free of any rust or paint using wire brushes. After the pipes have been cleaned, you will need to assess the extent and type of damage. Caulking It's not permanent, but it can be used to prevent further damage and keep rainwater flowing. You can find mortar caulking at most hardware and home improvement stores. It is used to seal gas in bricks and stones as well as metals, repair fissures and foundations and stop leaks around doors and windows. Before applying caulk, remove any loose paint or rust. If you need to, employ a wire brush or scraper to remove the paint or rust. Be careful not to scratch or cut the pipe. Wear gloves when working with caulking as the chemical compound may cause irritation to skin. First prepare the area for the caulking application by cleaning it using a scraper or wire brush to remove any rust or debris stuck to the pipe joint. Masking tape can be put on either side of the joint to ensure clear lines when applying the caulk. The edge of the caulk tube needs to be cut at a 45-degree angle. Then you can fill the caulk gun up with a small amount of the compound. Apply it to the gaps and joints you'd like to repair. It is important to apply a caulking device with constant speed and pressure to apply a smooth, even bead. After you've applied the caulking ensure that you wait at minimum six hours before you use the downpipe again. This will allow the compound to completely dry and create a an extremely durable seal. While most people are able to do some of the work themselves to maintain their gutters and downpipes, it is advised to leave more substantial repairs to professionals who will provide the best results. T