What self levelling floor for old house?

[Honest52]

Hi

How to DIY self level floor for old house? 

Our old bedroom carpet will be removed. Tidy up the floor.

We want to know if self level floor is better than hybrid board for DIY?

By comparison two methods, please advise pro and con of  budgets, tools, time required,  lifespan,  etc?

Thanks in advance 

[Jason]

Hi @Honest52,

Please share some photos of your flooring underneath the carpet to show what you are working with. It is difficult for community members to provide specific and helpful advice without sufficient detail. 

Thanks,

Jason

[Honest52]

Just old timber floor in a 50 years old house bedroom. 

Do we need to add a waterproof sheet first before using self level floor compound to protect the timber floors?