ᐅ Leaky Front Door in a KfW 70 Energy-Efficient House

Created on: 27 Jul 2016 22:53
M
MünchnerKindl
Hello,
our house was completed last year. From the beginning, we had problems because it was noticeably cold near the front door. The staircase is right next to it, and when standing there, you can feel a clear draft from top to bottom. At the end of last year, our site manager came and adjusted the door, but he said he couldn’t do more.
It improved but was still not good.

In spring, we had heavier rain, and then water collected inside the house at the bottom of the front door. The entrance is raised by 2 steps (2 steps), so it can only be from the rain and not from standing water. The site manager explained to my husband that front doors are not waterproof. Today we had the same problem again – as has happened several times before.

It cannot be that water runs inside at the bottom of the front door every time there is a storm.
In addition, we have a mechanical ventilation system with heat recovery. Shouldn’t the door be sealed because of that alone?
I found something online about "wind-driven rain resistant" and tightly sealed joints. But that does not apply to our door at all.

Best regards
P
Peanuts74
28 Jul 2016 10:49
Hmm, that’s really tight then... Our door is on the west side (the weather-facing side) and is never locked when we are at home. Still, no water gets in, even during heavy downpours.
M
MünchnerKindl
28 Jul 2016 10:57
As mentioned, our site manager said that doors are never truly "waterproof." I can understand this if water is standing in front of the door, but our entrance area is elevated, so there is no standing water. Therefore, the water can only be runoff on the door itself.

Exterior view of a gray front door with a metal handle against a gray wall.
L
Legurit
28 Jul 2016 11:06
Have you identified where the water is coming through?
For example, we have rubber seals everywhere. The weak point for us would be at the bottom, since there the rubber meets the aluminum strip and not the frame.
M
MünchnerKindl
28 Jul 2016 11:08
The first time, I placed a carpet runner inside right by the door to see where it was getting wet.
Inside, on the right side of the door, under the lock cylinder, and to a lesser extent on the left side.
Yesterday, it happened again on the right side. The rain wasn’t as heavy as the last time.
However, we had a "normal" thunderstorm, so no heavy downpour.
L
Legurit
28 Jul 2016 11:14
Are the rubber seals clean there, fully intact, and properly aligned with the frame?
M
MünchnerKindl
28 Jul 2016 11:25
I just checked this, of course only in a "non-professional" way. It seems the seals are already touching the frame.
However, on the outside at the top left, above the lock, I can still fit my finger in between.
During the winter, we also bought an infrared thermometer and found that on the inside of the door, some temperature differences of 3-4°C (5-7°F) occur around the seals.