This old house general contractor tom silva has a fast fix for a dripping rain gutter.
Best way to seal a leaking gutter.
Here s two ways to not repair a leaky gutter and one solid way to do the job correctly so that it holds for years not weeks.
Some sealer is water based and may do ok in light moisture conditions but it is best if you check the gutter clean the debris and if its wet wait for a hot day so it will be completely dry.
Do not apply silicone on top of silicone or on top of the old gutter sealant.
Use a little water to spread it out nicely.
Lower the uphill piece back into place and press them together for several seconds to make sure you evenly distribute the caulk.
Be liberal when applying the sealant directly onto the seam that leaks.
One brand of tri polymer caulks the ct1 sealant is a hybrid polymer formulation that contains no solvents.
See below for a shopping list and tools subscribe to this old house.
See pic for reference.
Also when installing the gutter flashing don t worry about overlapping some sections if they are necessary at least as long as they don t compromise the system in some way.
Water will eventually find its way under both layers of silicone and back to the original leak location.
Fix the seam seal use the caulking gun to apply sealant on the inner lip of the gutter segment known as the downhill.
Apply a gutter sealant on the interior seams to ensure that the gutter is leak proof.
Using a small trowel a gutter scoop or your gloved hands clear.
Squeeze a bead of sealer along the seam joint and then smooth the sealer to allow easy flow of water through the gutter.
This means the caulk will not shrink as it cures.
Try to avoid the clear as the uv rays from the sun break it down quicker.
If they are full of sodden leaves and smelly muck it s likely that your problem isn t so much a leaking gutter as a spillover.
Use your fingers and get the sealant right into the seam and up both inside walls of the gutter.
Replace all pieces that make the seam and then finish by re adding the screws.