You can disassemble old carpentry on your own or you can give let it to us.
When disassembling carpentry it is neccessary to know which way the window is attached to the wall and in which order should be done disassembling.
In case disassembling is done by an unskilful person it can cause seriouse trouble to assemblers and can needlessly destroy the wall.
After disassembling old and mounting new carpentry it is neccessary to do finishingf works and to fill the unevenness.
Alufix has the most skillful workers and with us disassembling is quick and simple.