I purchased an aluminum door threshold to use on my basement door
leading into my garage. Every year a small bottom of the door gap
allows cold air into the basement from the garage and I have been
using a rolled up towel to keep the drafts out (and heat in).
Anyway, I need to drill into concrete (I have the drill bit) in order
to screw the threshold down. The install directions say to use caulk
on both edges of the threshold for maximum sealing.
I was wondering what type/kind of caulk to use. Also, should I be
using a small amount of caulk (or even adhesive) on the entire length
of the bottom of the threshold too to really seal all the exposed
edges, or is screwing it down sufficient? Actually, as it has a
flexible vinyl bumber that would butt up against the door maybe I
don't need caulk along the length.
100% silicone is fine for metal to concrete. And that is the key. One that
bonds well to metal and concrete.
Most of the ones I have installed have a groove on edge side along the base
where the caulk is applied.
The 100% clear stuff is not going to store well so go ahead and add as much
as you like under the threshold.
Do make sure you have it properly cut and the door swing tested before you
apply the caulk. One screw is usually enough to hold it in place for
Please come visit www.househomerepair.com
Use polyurethane calk for strength. Really you don't have to drill if
you use that. Just clean everything before application. 3-4 times stronger
I just glued down a 4 inch PVC pipe after drilling about a dozen holes into
the slab. It hold real well. It takes a couple days before it really gets
tough. The holes were my tempoary radon suction point. There seems to be enough
gravel and floating in my slab that my simple radon removal system
works so well.
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