https://www.repairmywindowsanddoors.co.uk/ramsgate-guttering-and-downpipes-near-me/ Repairing Leaks From Cast Iron Downpipe Joints Leaks from downpipe joints made of cast iron could be a serious problem. 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 remove any rust or paint off the pipes. When the pipes are clean then you'll need to evaluate the extent of the damage. Caulking It's not permanent, but it can be used to prevent further damage and to keep rainwater flowing. Most hardware and home improvement stores have mortar caulking. It is used to seal gas in bricks, stone and metal, repairing cracks in foundations and basements as well as sealing leaks around doors and windows and can be applied to cast iron pipe joints. Before applying caulk remove any paint or rust that has escaped. You can employ scrapers or wire brushes to accomplish this, but be careful not to scratch or cut the pipe. Wear gloves when working with caulking since the chemical compound can cause irritation to skin. First prepare the area for the application of caulking by cleaning it with a scraper or wire brush to remove any rust or debris 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 tip of the caulk tube should also be cut at 45-degree angles. Then, load the caulk gun with a bead of the compound and apply it to the joints or gaps you'd like to repair. It is recommended to employ a caulking tool that has a constant speed and pressure in order to apply an even, smooth bead. At minimum six hours after applying the caulking before applying the downpipe. This will allow the compound to dry completely and create a durable seal. Although the majority of people are able to do some of the work themselves in order to maintain their gutters and downpipes it is recommended to leave more substantial repairs to professionals