Is it necessary to replace doors and windows when renovating an old house in Malaysia? When is the most cost-effective time to switch

In Malaysia, many homeowners live in houses or apartments that have been in existence for over ten years. When renovating, one often struggles with a question: can doors and windows still be used? Should we switch or not? In fact, there are very clear criteria for determining whether doors and windows need to be replaced.
1、 In these situations, doors and windows must be replaced
If your home’s doors and windows have the following conditions:
Clearly leaking water
Difficulty switching on/off
Frame deformation
sealed aging
Continuing to use it will only lead to more and more problems.
2、 The most common problems with old doors and windows
Common old houses:
Poor insulation of single-layer glass
Old style pulleys are prone to jamming
The lock structure is simple
There is a significant gap between the current living needs and the current demands.
3、 When is the most cost-effective time to replace doors and windows?
The most recommended timing is:
Initial stage of overall renovation
Before wall or floor construction
Avoid secondary damage and repeated construction.
4、 What should I pay attention to when replacing doors and windows in an old house?
In the renovation of old houses in Malaysia, special attention should be paid to:
wall structure
Original opening size
Waterproof and edging treatment
Experience is very important.
5、 What are the restrictions on apartment renovation?
Many apartments:
No changes to appearance allowed
There are restrictions on color and window type
Advance application is required
You must confirm in advance.
6、 What changes can changing doors and windows bring?
After replacing the appropriate doors and windows:
The air conditioning effect is significantly improved
Noise reduction
Overall living comfort improvement