Code 75 OO on Celotex?

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LittleSkink
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Code 75 OO on Celotex?

Postby LittleSkink » Sat Mar 12, 2016 10:07 am

having drawn up a design for a 6mm ply based 8' x 4' board (which is workable, but a lot of work) I am now exploring the merits of a board construction using insultation foam - just to be sure we make a sensible start that wont cause pain later

My main concern is securing track etc to the foiled foam surface, the intent is to mostly build with Peco 75 flexi track so the curves can be nice and smooth. With Ply I would use cork underbed (I like the look of shaped ballast) and pins - my concern with foam is that a board getting moved around is not going to hold the track as securely, and I dont really want to glue the track to the board as in a year or two we may strip it off to use in a more permanent layout

thoughts?

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Emettman
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Re: Code 75 OO on Celotex?

Postby Emettman » Sat Mar 12, 2016 12:31 pm

I'm currently using 2mm EVA "funky foam" as my underlay. It's softer and seems more noise absorbing. The celotex, with rigid roadbed/ballast, is a bit more "boomy" than some plywood topped boards, but a lot depends on the sub-structure.
I'm not sure the EVA foam would be happy with heavy all- whitemetal locos: it might have too much give, but otherwise I'd have no worries.
Thin PVA adhesive, I've used.

Chris
"It's his madness that keeps him sane."

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RAFHAAA96
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Re: Code 75 OO on Celotex?

Postby RAFHAAA96 » Mon Mar 14, 2016 2:27 pm

Use a latex based glue like Copydex or Evostick, which when time comes is fairly easy to peel off.
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Bufferstop
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Re: Code 75 OO on Celotex?

Postby Bufferstop » Mon Mar 14, 2016 3:48 pm

Double sided carpet tape.
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hockeyshooter
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Re: Code 75 OO on Celotex?

Postby hockeyshooter » Sun Feb 12, 2017 3:34 pm

I wouldn't use Celotex - way too soft.

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hockeyshooter
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Re: Code 75 OO on Celotex?

Postby hockeyshooter » Sun Feb 12, 2017 3:34 pm

I wouldn't use Celotex - way too fragile.

b308
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Re: Code 75 OO on Celotex?

Postby b308 » Sun Feb 12, 2017 4:21 pm

I wouldn't dismiss it that quickly. Many of my narrow gauge colleagues use it but with a facing of thin ply to protect it and act as the track bed. Usually the pink or blue stuff approx 50mm thick.

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hockeyshooter
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Re: Code 75 OO on Celotex?

Postby hockeyshooter » Sun Feb 12, 2017 5:00 pm

Ah yes, with something over the top, that makes more sense!

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Emettman
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Re: Code 75 OO on Celotex?

Postby Emettman » Sun Feb 12, 2017 5:41 pm

hockeyshooter wrote:I wouldn't use Celotex - way too fragile.


I've used single pieces of Celotex or similar brands up to 4ft by 2ft in 50mm, with no issues with fragility.
With 3D scenery of the same material firmly attached, producing something of an L girder effect I'd probably br happy with 25mm thickness.
The outside edges I seal with duct tape.
If using several boards I would use a plywood outer frame to take pattern-maker dowels.

My latest usage has been a 4ft by 20" by 1", board carrying a 32mm gauge display track for my kitchen window-ledge.

Image

No risk of breakage lifting the thing in and out.
(but it is well supported when in place: if that was at the ends only I'd use 2 1" pieces to give a sandwich structure.)

Chris
"It's his madness that keeps him sane."


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