Uneven floor and laminate flooring!

[daginge]

Hi ABers
My new house has a dip in the lounge floor which, I think, stems from the removeal of the old fireplace hearth. The dip is to the right in front of the chimney breast and is approximately 1.5cm at it's deepest and approximatele 35 cm in length. Before I rush out and buy "a shed load" of laminate flooring, my question is; will I be able to compensate for the dip with additional underlay, i.e. the board type rather than the roll out type or, a combination of both; without compromising the integrity of the flooring material?
TIA
DG

[The Builder]

Never rely on underlays alone, Daggers .............. something like this.....

http://www.screwfix.c...64?_requestid=2308659

[Old_Geezer]

You may try, it seems a reasonable possibility, but I'd not hold out a lot of hope. Underlay compresses, it would be difficult to know how much extra is needed. Ideally you need to lift the floor and do whatever is needed to ensure all is level. And if you do that you can find out why it occurs rather than assume you know.

[boxtops]

I'd level the floor with a bit of concrete, first.

[daginge]

Nice one guys, thanks. The problem is the floor is already tiled, I suppose they'll have to come up and the floor be levelled. I suppose the old addage of if you're gonna do it, do it right first time and all that applies here!

[dotty.]

a bloke came to my new place to measure for the flooring and he said they pour this levelling stuff on first and it self levels or something, science or what?

[Old_Geezer]

Aye, I hear Screwfix has some of that stuff.

[The Builder]

Daggers......... if you go for a floor leveling compound, as per the one in my link, you won't need to remove the tiles first.