Buildings B

4.1 Dealing WithIding Defects& Nuisance4. ]. 7(cj Windows (continues)Replacement of window frames is inevitable if:• the frames have deformed, become insecure, deteriorated to a considerableextent; and• the quality of the frame or its waterproofing materials filling the gap betweenthe frame and the parent structure is in doubt, leading to constant leakagebeyond repair.In the process of installing the new window frames, readers may wish tonote the following points:• window frames should be securely and rigidly fixed in place to windowopening in walls by fixing lugs;• suitable waterproofing grouting should be properly applied between thewindow frame and the opening with an additional coat of waterproofingmaterial around the frame; and• for aluminium windows, joints in window frames and sections should beproperly sealed with suitable sealant. The window frames should be suitablyequipped with water bars at its sill to prevent entry of water. A continuousgasket of suitable materials should also be properly applied along the wholeperimeter between the window frame and openable sashes.4.1.2 Building Services Installation(a)Electrical Installation(i)Registered Electrical Contractors/workersThe repair and maintenance of electricitysupply system should be undertakenby registered electrical contractors/workers. Name lists of registered eectricalcontractors/workers are available forreference at the Electrical and MechanicalServices Department's (EMSD) CustomerServices Office and web site, as wellas all District Offices.SELECTING THE APPROPRIATE SOLUTIONS