Leaky Gutter Corners

Seamless Gutters are popular because they are seamless, meaning they come in one piece no matter how long the length. The advantage to this is visual as well as functional. When there are seams in a gutter they are just potential leaks waiting to happen. The only time there are seams in a seamless gutter is when it comes to corners and miters. Obviously our gutter machines cannot produce gutters that make a right angle so a box miter or strip miter is used to join the two gutters together. If a proper silicone is not used to seal the gutter originally or a spot is missed the result is a leaky gutter. You can try sealing it with a better sealant and even tarring it, but 9 out of 10 times the leak comes back. The best way to ensure that the corner is not going to leak again is to replace it totally or scrape out all the existing silicone and use sandpaper to sand the silicone off leaving only the aluminum. After sanding all the silicone, re-apply a gutter/ window silicone to the corner where the seams are as well as the manufacturers seam. The type of silicone we use is SBR-100.