Rafter Insulation/lining

[33HILTON]

Hi,
I am thinking of using the loft for a train layout & scalextric layout for our son, so he has them permanently set up. The floor is already insulated & boarded, and a Velux window is being installed. I would like to insulate the rafters, with a view to stop any dust/dirt etc falling onto the tracks. I am looking into using the 'Thermawrap' type bubble foil.
Am I right in assuming I can just staple the foil to the faces of the rafters, which would give me a 75mm air gap? If so , if I then decide to board over the foil, would I need to fix battens to the rafters to create an air gap between the foil and the boards..if so what depth battens would I need?
Any advice/tips would be appreciated. Thanks

 

[noseall]

Are you asking from a "keep it under the radar" diy point of view, or a building reg's pukka job?

 

[33HILTON]

Hi
From a DIY point of view...just something to keep dust/mess off the layouts. As it will only be used occasionally, I am not fully converting the loft..just merely trying to utilise it a bit more if possible. Does your concern relate to the 'boarding over' the foil...would I have any problems if I just left the foil visible? Is there any other product I could use ?
Thanks

 

[noseall]

My main concern would be condensation in the cold winter months.

Any measures you take to conserve heat and prevent condensation will inevitably help, but may only be a token gesture. I have little faith in the thinner foil insulators, but i guess it will be better than nowt. The insulation in the loft floor will have no bearing whilst you are in the loft.

Using foil backed plasterboard may help also.

 

[33HILTON]

Thanks for your replies.

Could you suggest any alternatives for the rafters? I didn`t really want to spend too much if possible..as it may only be a short term venture.
I cannot fully convert the loft as there is insufficient headroom..so if you advise against it, then I can save myself the cost of the Velux window...as there would be no reason to fit one.

Thanks again