A hard object crashing a window that has caused it some damage will need immediate repair or replacement from a glass shop in Surrey. The less obvious damages are those due to slow deterioration of the glass itself or the frame holding it. The windows may appear intact, but the disintegration of the material components could be only a little push away from falling off.
Interior Moisture Damage. Condensation on the window components can cause deterioration on the edges of the frame, particularly the sash.