When historian Lucy Parker restores an old mansion, she replaces its decayed wooden entry with a sleek uPVC casement door. But the moment the new door is installed, strange things begin happening—faint knocks with no one outside, glimpses of figures in the glass, and an old letter mysteriously appearing on the threshold. As Lucy digs deeper, she uncovers a century-old secret tied to t... https://thegreenfortune.com/product-categories/upvc-casement-door/