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Building on foam

R reimeruxOGR Forum Member
I am in the late benchwork stage in building my layout. The open grid is done and I added a layer of plywood.
Before I add the 2 inch extruded layer, I would like to know how best to apply the incline an tunnel structure.

Do I build it on top of the foam or drill through it and attach it to the benchwork?
Should I build the incline first and add the foam later?
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c.samc.samOGR Forum Member DIGITAL SUBSCRIBER

The foam is pretty firm and should hold up well. Many structures are constructed of foam with hot glue or other an dare very strong.

Are you planning to use roadbed of any type?  Reason is, the foam will often amplify the sound if  track is laid directly on it. We used carpet rubber with cork roadbed on top of blue foam and were pleased with the level of noise (or lack thereof).

R reimeruxOGR Forum Member
I am using fasttrack which has the roadbed already built in. Tomorrow I will be performing a few tests to assess the noise level. It was pretty loud when it was running on hardwood floor. If you use carpet underlayment, how do you cut it to size? Do you just fill the fasttrack hollow roadbed or do you extend beyond to separate it from the foam?
RickORickOOGR Forum Member

 I think the 2" foam is more than adequate,while technically not a sound deadener, I laid fastrack on pink foam on top of my bench work and the difference in noise versus a wood top was HUGE. I am more than pleased with the noise level of my trains, what noise is there comes from steel wheels on steel track. Also, I agree with csam as far as "building on it "is concerned and hot glue gets mountains or other scenery structure secure in minutes.

R reimeruxOGR Forum Member
I am making progress on the tunnel. I have decided to put half off the support structure onto the beam of the benchwork and then the remaining resting on the foam. The foam is helping to reduce the noise level somewhat. The fasttrack will be fixed the the foam with drywall nails. That makes for a smoother ride and helps with storing The modules.
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