你应该联系一个石匠专攻历史建筑保护和评估问题。基于损伤可以恢复基石部分或代之以新的石头门槛。窗框将固定在窗口堵塞(石头)这可以进行恢复治疗没有删除windows。说,这并不意味着它会容易。你需要和经验枕

石基石应该被替换或修复windows安装之前。

你好,
两个问题——窗台石或混凝土?(一大区别)
石头(铸造或雕刻)可能会未上漆的,可能是灰色或浅棕色/砂彩色(最常见),平滑的或稍桑迪纹理。
混凝土(最可能的选项)可能会画,如果坏了你会看到灰色(水泥)和小石头/碎片。
石基石,而专家和梅森需要一块石头或铸石专家。
混凝土基材可以修复或重新完全(一个建筑商可以渲染和砖砌应该能够做它)或者你可以预制的混凝土基材和适合他们。

你好,
这听起来像一个目录的错误。
你不需要牺牲一块石头梅森,任何有信誉的建设者能够取代石头门槛如果损坏无法修复或替换匹配假设这不是上市建筑砌砖。土地测量员从窗口公司应该捡起任何松动或损坏石头门槛之前给你选择修理或更换安装。The fitter should of also seen the movement in the cill when removing the old windows and packed it in place so as not to fall away then let you know of the situation before taking out anymore frames! I do really hope that your new windows ARE sitting on the stone cill and not floating above it like you said. Sash windows are heavy and the weight needs to be resting on a solid surface. At the moment it sounds like the frame fixings are carrying the load. Contact a decent builder and tell the window company you'll contact them when it's done to come and finish off (Sealing etc.)
祝你好运。