Welcome to this site.
Lots of advice for you on this subject and it's all good. It's just down to the individual,get someone out to look at it it's a free service to you.
Simply put your job on this site and you will be sorted.
tradesmen pay for the opportunity to quote on your job.
It is important to give tradesmen contacting you the opportunity to do so, the advice you receive is free. You are not obliged to use any of them.