My house has a gap between the Basement wall and Sill Plate (location best shown in this picture). While there are several question and answers here, I have not found any that deals with a fix from the outside.
I started looking into this since even with the fire place going, there is still a draft of cold air coming in, and from the direction of the fire place.
- Does anyone have any guidance on the correct way to address something like this?
- Could I use Great Stuff on the exterior between the Sill plate and the basement wall?
Asking this since I do not know if there are any consequences. I live in a Zone 5 climate.
The gap is shown here with the spot light from the flash light.
Here's the view when I took a step back. This is the exterior wall, underneath the natural gas fire place.
Fireplace thermal - comparing the heat from fire to the stone base. Obviously, this is a picture from inside the house.
Fireplace thermal - zoomed in showing where the air leak is coming from. That dark blue line is, I suspect, the air leak.
Here is a thermal image of the exterior of the house. You can clearly see the heat loss from the basement wall and sill plate. (I'm referring to the yellow heat spots to the right of the steps.
Just a bit closer. Heat loss right of the steps.
And even closer.