Using standard plasterboard 9.5mm to board up fireplace?

[howardino]

Hi,

Am I ok to use standard plasterboard 9.5mm to board up a brick fireplace?
There seems to be mixed opinions on this as some are saying to use brick/block, others are say to use moisture resistant plasterboard?

If it is ok to use plasterboard, I've got some wickes instant grab adhesive (solvented) - can I use this to fix the plasterboard to the brick fireplace - I've cut away about 10-15mm of plaster surrounding the brick fireplace opening to allow for the fixing - is this sufficient?

From the threads I've read, I know its important to put in a air vent and cowl the chimney pot.

I've a plasma tv mounted on the chimney breast and I've channelled cables through the plaster which will then go behind the plasterboard covering the fireplace opening and come out through a cable faceplate which has brushes/hairs - would this be sufficient to use as an airvent? or best to still use a dedicated airvent?

I'll be wallpapering over, I've 3 mini-trunking carrying 2 hdmi and 1 tv power cable - I take it the trunking will probably show through the wallpaper - is it best to use polyfilla to cover over the trunking and sand down?

sorry for the questions, I'm pretty pathetic when it comes to diy - I decided its high time to get manly with tools and try to learn how to do things properly. Its enjoyable and a great sense of achievement once things work out!

Appreciate your help.

 

[foxhole]

Depend how well the chimney is capped and vented, you can get rain down the chimney which will destroy plasterboard, you can use plasterboard and add a vent but you may end up replacing if it gets damp.

 

[howardino]

I've had the fireplace open for some weeks now during renovation, just covering it with a loose plasterboard offcut. With all the rain we've been having, the fireplace is dry and I've not seen any rain come down? though I do feel a draft round the chimney when the wind is blowing. Would I expect to seen rain come down?