I installed an exterior metal clad door this past fall. I installed it according to the instructions, including culking under the threshold and everywhere else. But yet is continues to leak water at the threshold when it gets hit by rain. I have the same problem at our kitchen door, as I just had to replace the subfoor since it must have been leaking since it was built 9 years ago. Any suggestions?
Thanks

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Ed

 

Hi, it really sound like the splash up from the landing is what is causing your problem. If you have a pitched roof you can inexpensively try to install some water diverter strips close to the edge of the roof line to divert the water away from the overhang. Simple drip edge installed under your shingle courses really helps. Careful with your ladder. Hope this helped.
-Bob

 

Is the water coming in under the threshold, or is it coming in between the threshold and the bottom of the door??

Before you can fix the leak, you HAVE to know where the leak is.

 

The water is coming from under the threshold. The rain hits the door and threshold and somehow leaks through. The door fits tight to the threshold and is tight to the weatherstiping at the door jam. I've calked everthing that could possibly leak water. The siding to the house extends about an inch below the rough opening for the door. So I installed the door so that the brickmold was behind the back of the siding. So I know that water from the siding is not leaking in above the door. I can see the rough opening for the door from inside the basement, and it is not getting wet. So I know the only place it can be coming in is at the threshold. The only thing I can think to do is remove the door and frame in the spring, recalk under the threshold and reinstall the door.

 

It may be possible that you can add a flashing beneath the threshold, tight and sealed to the bottom of it, that extends an inch or two past the ends of the threshold that will cure the problem.

What did you use for caulking when installed the door? (Not all caulkings are created equal!) I would suggest that you use Owens-Corning #795 weatherproof sealant. You will find that at a local glass shop, NOT a big box store.

 

I used DAP acrylic latex sealant plus silicone 230 grade. I will look for the calk you suggested and give flashing the threshold a try. Thanks.