fitting vapour barrier

[marsaday]

i have been told you use a staple gun to fit a VP over the insulation before the plaster board goes on?

is this correct, just a simple stationary gun?

 

[Deluks]

One of the palm squeeze ones, not an office desk paper joining one.
Or a leccy one can be had quite cheap. If using foil backed plasterboard, no need for VB.
If using the insulated PB as per my other reply then also no need.

 

[PrenticeBoyofDerry]

Hand held staple gun or hammer tacker like these:
http://www.toolbox.co.uk/hand-nail-staple-guns-3153-0000
or use foilback boards called duplex.
But check when using insulated boards, because not all have a vapour check.

 

[mointainwalker]

Any pb that has insulation bonded to it is vapour-proof and you do not need to check it any further or add another barrier.

 

[marsaday]

on cost grounds i am going to use normal PB. there will be 125mm celotex behind this as well. to be safe i will be putting in a VB.

 

[mointainwalker]

Right thing to do. Very little cost and you don't have to try and cut the board with surgical precision.

 

[Chukka63]

no need for a VP.

 

[mointainwalker]

So Chukka, what do you do about the holes/inaccurate cutting/battens out of vertical and consequent gaps with the insulation board infill ?

 

[Chukka63]

expanding foam.

 

[mointainwalker]

much cheaper and easier to use a plastic sheet rather than having to slice of all the excess bubbling above the line of battens so you can get pb to screw down flat

 

[freddiemercurystwin]

expanding foam.

Yea thats a bit of a bodge though isn't it Chukk?

 

[Chukka63]

no,thats what i was told to do by the BI but i dont get many gaps.

 

[Chukka63]

much cheaper and easier to use a plastic sheet rather than having to slice of all the excess bubbling above the line of battens so you can get pb to screw down flat

much easier to cut the boards accurately and no VP or expanding foam (as i do) .Im just quoting BCO,

 

[mointainwalker]

What's the VP you keep mentioning and are you sayimg your battens are EXACTLTY vertical and you then cut your panels EXACTLY square so there are no gaps at all ?

 

[Chukka63]

VB sorry,no rafters not square but you can cut the boards on the angle to suit