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Old 20-05-2018, 12:40 PM   #51
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Quote:
Originally Posted by LocoShed View Post
If it smells, it is probably damp, which means you've already got problems!

I used insulation board on a layout years ago and ended up ruining the layout because the stuff warped when applying PVA to ballast.

Obviously people have different views and opinions on this, but you cannot get away from the fact that insulation board is heavily influenced by damp/wet which means that you must not get any water-based materials anywhere near it. If you MUST use it, seal it with an oil-base paint, NOT a water-based paint.

The idea of sealing it with PVA has merit, but remember, PVA contains water (depending on what ratio you choose) which will cause insulation board to warp before the PVA sets, by which time, the damage is already set in.

Also remember: what is the point of using insulation board ? Most people say that it is a combination of cost and noise reduction. If you seal it with PVA, does not the soaked in PVA make the board go hard, defeating the noise reduction purpose ?

As someone else has already pointed out, the only material which works reliably is ply wood. Yes, it might be expensive, but you only build a layout once. If you don't get the foundations right, the building will never be successful and you'll soon want to build another one, spending out more money sooner than you would have done otherwise.

My 'Ashprington Road' layout uses ply wood with Dexion bracing. It was stored in a Sydney garage at one point for over a year, experiencing night time temperatures down to zero and daytime temperatures of over 40 degrees. It did not suffer any damage at all.

Graham Plowman
I have painted the insulation board in a 50/50 PVA mix and the smell has gone away on a new peace of insulation board.
What do you use as a baseboard and what do you to secure your track to the board?
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Old 20-05-2018, 02:17 PM   #52
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Ply wood and track pins.
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Old 20-05-2018, 03:55 PM   #53
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What size ply
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Old 20-05-2018, 03:58 PM   #54
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12mm. 1/2 inch.
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Old 20-05-2018, 07:22 PM   #55
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Pin or glue?
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Old 20-05-2018, 07:27 PM   #56
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Pin or glue what?
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Old 20-05-2018, 09:53 PM   #57
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Pin or glue your track to the baseboard?
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Old 20-05-2018, 10:04 PM   #58
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As I said in post 52, track pins. I then ballast so glue as well I suppose.
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