survey shows a problem with roof-Need a roofer to inspect

[armour]

Hi all, I'm buying a house and the survey says that there's a slight dip in the roof which may have been caused by a "heavier" roof having been put on without the structure being strengthened. I guess I need an expert to investigate. How do I go about finding one? I live in London SE25.
Any input appreciated.

 

[Nige F]

Very probably the re- roof is the cause . You need a Carpenter. " "Roofers" are notorious for being Itinerant caravan dwellers and they generally do the outsides How do you find a skilled carpenter in Croydon - That`s another question.

 

[noseall]

A lot of slate roofs in the London area have been replaced with much heavier concrete tiles.

A structural engineer may need to advise or a competent roofer.

The problem of sag may never be fully alleviated as the timber may be bent to shape. I am thinking a hip roof no?

 

[Deluks]

What road? Street number? Am popping to Addiscombe later, might drive past it. Terraced house by any chance?