Hi all, got some more photos to share for opinions hopefully.
Here is one of the windows which appear to be hardwood. I assume is some kind of paint or coating that is peeling off, so they all need some sanding back and retreating. Any major concerns with this? What product would you use? As you can see the windows are double glazed but they are very thin units, looks only 6mm. I wouldn't be able to afford to put in uPVC.
The extension has been built with a chimney which Ive never seen done before. Does this help pinpoint the age of the extension?
Here are the lower unrendered sections of the walls. The thickness of the walls at the window and door sections was around 250-280mm give or take. Do you think cavity? I can make out the thicker section of mortar where the DPC is in these pictures. What are the bricks with what look like rivets embedded in them for?