There are at least three alternative ways to do it.
Attaching downspout to vinyl siding.
We re only talking about an area of about 3 inches between screws so a couple of thousandths expansion won t be a problem.
Step 5 apply silicone caulk around each zip screw head with a caulking gun where the head meets the vinyl siding.
I have plain old painted downspouts and the only thing i can think of is drilling a hole on either side of the downspout in the vinyl and attaching an aluminum strap.
Using the clamp place it to secure the downspout.
Vinyl siding can expand and contract 1 2 12 7mm or more over a 12 6 3 81m length during normal year round changes in temperature.
Whether using a nail screw or staple to fasten the siding the following basic rules must be followed.
Place additional straps every 10 feet of the downspout length if it is a long downspout or just one more between the upper and lower strap if the downspout is less than 10 feet long.
This renders the siding vulnerable to moisture and voids the warranty even if you seal the hole.
Bend the metal mounting strap around the downspout so that the ends sit flat against the vinyl siding.
Drill a hole wide enough to accept the anchor you will be used to attach the gutter clamp for the downspout.
Drive a 1 1 2 inch zip screw into each side of the strap and through the vinyl siding with an.
There s nothing in my manufacturer install manual.
Use a fine pointed marker to mark the location of the holes for the clamp.
Is there a preferred method to attach downspouts to vinyl siding.
Attaching downspout strap to vinyl siding if concerned about penetrations drill a hole for the screws and apply a dab of silicone adhesive sealant to the hole prior to fastening.
If you want to hang something from your vinyl siding don t even think about drilling through it to attach a hook to the sheathing.
Not only is this unsightly but it also voids the warranty on each panel of vinyl siding that is so nailed or screwed through.
This is the method used by all gutter installers.