Hiya
A single storey extension was added to my house around 15 years ago. The layout is as follows (excuse the ASCII art)
Top view of back of house (dotted line shows where the original outside wall was):
| | | | |___________ ____| | . 5| | . | | . | | 2. . 1. | | . | | . | |_______________.____________|
Back view of house:
_____________________________ | __________ 6 _______ | | | | | | | | | 4. | | | | | | | | | | | |__________| | 3. | | | | | | | | | | |_________________|_______|__|
- The extension, which 'squares out' the back of the house.
- Original single storey kitchen.
- French doors to back garden.
- Window.
The new walls are joined to the old using those metal plates which you screw onto one wall, and key into with the other (what are those things called?)
I've noticed that at point 5 there is a crack running down the length of the wall in the corner, which seems to be slightly more pronounced at the top. On the outside wall (in the new brick) these is a crack running around the bricks from the top of the wall to the french doors (6). These is a crack on the inside in more or less the same place.
I know that the extension foundations were inspected by the BCO and found to be satisfactory (same depth as house foundations). Is this kind of movement to be expected? Does it meant the foundations are inadequate? How might I find out if this is a problem?
I'm certainly haven't noticed the cracks getting any bigger (currently a few hair widths) so it might have been something that happened earlier on in its 'life'.
Any comments/suggestions?
Cheers,
-- Jon