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DIYinTraining 03-07-2011 12:02 AM

Water leaking in through door on main floor down to basement.
My apologies if this isn't the right section to be posting this in.

I have a leak which is letting water come in under my door on the main floor of my house. I usually place a towel at the bottom of the door and it appears both ends of the towel are the most damp after a hard rain. On very windy and raining days it will leak so much that it penetrates down through the floor into my basement (Nothing major but the water leak is very apparent).

I found out this was happening because I noticed that small pools of water were building up inside the plastic covering containing the insulation for the interior walls, it just happens it was directly below where the water was coming in from under the door on the main level. The water had made its way through the floor and was dripping through my insulation eventually resting on the plastic covering.

I first thought this was entirely due to the water entering the house under the main floor door, but as a trail and error experiment I taped up one side on the the outside of the door between the vinyl siding and the left side of the door. The leak seemed to have stopped.

So now I'm in major panic mode because water is coming inside from what I think is under the door and now it seems to be entering the basement through the floor somewhere outside between the vinyl and left side of the door.

Is this fixable without getting some contractor in to take a look? Would this be considered structural?

I will add pictures tomorrow in my attempt to better explain what is happening and where the water is coming in.

Any advice or suggestions would be greatly appreciated!!


Just Bill 03-07-2011 06:11 AM

Without seeing the door, my first guess is that some caulking is needed at the door threshold. I am assuming no storm door??? A pic would help us.

stadry 03-07-2011 07:41 AM

' nothing major ' means NO water :) no matter how its getting inside.

obviously you've got a hole somewhere so get out the garden hose & duct tape when its dry & try to replicate the conditions,,, imo, that's the only way you'll find it.

DIYinTraining 03-16-2011 07:42 PM

4 Attachment(s)
No storm door and it's cover by an over hanging roof!

Hopefully these pictures will help!

Csquared 09-10-2011 09:46 PM

Were you able to solve your water problem? Pictures look all to familiar. Was it the door leaking down into basement?

oh'mike 09-11-2011 05:15 AM

Excellent question,Csquare-

What was the outcome?

DIYinTraining 09-22-2011 06:02 PM

Yup the water was coming in through the bottom of the door and leaking down into the basement through the sub floor. I bought and installed a quality storm door and voila! No more water, period! The hardwood has since dried out around the door and doesn't creek and crack anymore, and nothing has appeared in the basement. I started to experience this problem for about 6 months, and it had started to occur after hurricane Igor. I've since been told stories about people who had this problem unknown to them because most had their basements developed, it was actually happening for years. These folks had to do thousands of dollars in repairs because of mold and structural damage.

gscott 11-30-2011 10:15 AM

Did this solution still work now that some time has passed? I am having the same issue (water seeping or leaking through the bottom of an exterior door). I am considering a storm door as a solution.


GrahamB 11-30-2011 10:34 AM

Hey gang, I've had the same issues with all three new doors over the last 2 years. Depending on which direction the wind driven rain is coming from, water leaks through the corners of the doors. I've had a bit of success repositioning corner pads - I've also found the felt ones tend to leak more than the vinyl ones. I also have neighbours with brand new homes whose builders have told them the only solution is a storm door.
We live right on the alantic coast and are pretty susceptible to high wind driven rains.


gscott 11-30-2011 11:05 AM

Thanks for posting that. I think a storm door is what I need. I have (or seem to have) the same issue that DIY in Training posted (water leaking in the sides (bottom corners) of my door.

I don't mind installing a storm door, but I live in Michigan and we just got 4" of snow, so I would prefer to use a temporary solution for the winter, then install the door in the spring time.

Can you explain the corner solution you mentioned? What do they look like? Brand name?

GrahamB 11-30-2011 01:29 PM

Hey - yeah the corner pads are foam wrapped in vinyl. Here is a link to a good visual and description:
I found the same thing at my local hardware store for a couple of bucks. Not sure if it was from them or not.
I did actually notice on DIYinTraining's last photo that the weatherstripping was broken right near the sill. I don't know if that might be a contributing factor or not.
The weatherstripping on one of my doors terminated just above the sill cap so I replaced it ensuring it was just slightly lower than the sill cap but not touching the sill. My theory was that water was running down the weatherstrip and then dripping/getting blown into the door corner.
It definitely helped but wasn't a solution.
The only real solution, in my mind, is a storm door.
Good luck,

litigs 11-30-2011 01:49 PM


Originally Posted by Csquared (Post 725675)
Were you able to solve your water problem? Pictures look all to familiar. Was it the door leaking down into basement?

Hi, sorry to interrupt; just my first post here. Similar problem I have but I have identified the leak from the roof. My issue is just discovered after a heavy downpour that water came in behind the exposed batt insulation; wall is concrete inside an uninsulated garage where temperatures hover to freezing these days. My concern is mold building up as it will be at least 2 days before I will find time to remove the insulation, and apply caulking at the roof flashing. Should I worry about mold building up that fast? Thanks a lot.

DIYinTraining 12-14-2011 04:31 PM

Update: It's been 9 months and no leaks or water damage since installing my storm door. :thumbup:

litigs - I don't think you have to worry about mold buildup after just 2 days.

stadry 12-14-2011 04:46 PM

if i'm reading this correctly, caulk is not the right material,,, either use roofing cement OR silicone sealant :yes:

litigs 12-14-2011 06:17 PM


Originally Posted by itsreallyconc (Post 794136)
if i'm reading this correctly, caulk is not the right material,,, either use roofing cement OR silicone sealant :yes:

Thanks, I fixed the issue on my roof. You guys need to check those flashings every year because freeze and thaw would cause the metal overlap and the roof silicone caulking to break up. Some builders don't bother on the overlap so to hide the fault, they just apply thick dark silicone. I didn't check my roof last year so now the gaps allowed water to penetrate. Just wear mask when applying the silicone and make sure there wind blowing around. The smell can really sting you even outdoors, specially when the caulking gun you are holding is just a feet away from your face.

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