I need to insulate an MDPE pipe that runs under a suspended timber floor. Is armaflex the correct stuff? Was gonna go for 19mm thick..... bear in mind the Utility Company is connecting it, so they'll want it done right..
Heat loss, heat gain, location, environment and purpose all affect insulation choice.
Armaflex is specifically a closed cell insulation of benefit in a situation which can lead to damp, wet normal insulation. Used for cold piping or where hygiene or water proofing is important. Armaflex doesn't need cladding unless required for protection.
If you are doing this right, ask the company you are servicing to provide the insulation specification they use for this service. That should tell you exactly what to use. If they cannot supply a specification, give them a submittal of your recommendation including service limits, data sheets, etc and ask your contact to sign it off. This will waterproof your work against comeback should something nit be right.
I used a similar product, I believe "closed cell" was the requirement, I don't recall UU providing a particular performance spec - mine was in a continuous roll but from eBay so don't know what make it was. What ducting are you using? I used 110mm soil pipe but I've since, I think, seen a flexible pipe that's like land drain without the holes that might be better.
The UU "inspectors" I have dealt with were clearly just blokes off the tools and only gave the insulation a cursory glance, they were thorough with the trench depth, and not particularly interested in my approach to capping off the dead leg when I did a CSP.
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