ᐅ Roof insulation made of 100mm thick rigid polyurethane (PU) foam

Created on: 21 Oct 2019 09:19
A
Ankeffm
Hello everyone,
I urgently need some advice and tips regarding roof insulation.
We plan to have our roof replaced next year. Now, the topic is roof insulation. Our roofer recommended the following:
Polyurethane (PU) rigid foam, 100mm (4 inches) thick // Type: puren Protect N 023.
This would be an insulation installed above the rafters (i.e., external insulation). However, I have read in forums and other sources that sound insulation with this type of material often falls short. The noise level can sometimes be quite high. This is partly due to the boards themselves (as they apparently expand and contract, especially at night) and also because the boards do not provide good soundproofing.
We would really like the space under the roof to be more comfortable in summer and, of course, quieter—or at least that outside noise levels are bearable.
Can you give us advice on the best way to insulate a roof like this? Has anyone had experience with this type: puren Protect N 023?
Please help... THANK YOU!!!
Best regards, Anke
J
Joedreck
26 Oct 2019 14:29
Of course, that’s possible. And ALL costs related to the project are eligible for funding. For example, in my case it was the gas connection. Please, please take advantage of this opportunity.
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Ankeffm
26 Oct 2019 17:53
No, not yet. Hmm, I will definitely do that.
So, does that mean you can get funding? But what we do not want from the KfW is a loan. We are financing the project differently.
Can you still receive grants?
Pinky030126 Oct 2019 18:38
Yes, there are either loans or grants available. However, this must be arranged through an energy consultant, who is also eligible for funding.
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Ankeffm
26 Oct 2019 18:44
Oh, so you recommend having an energy consultant come first, right?
Hmm, they do cost quite a bit of money, don’t they? I need to check how much the subsidy from KfW is.
J
Joedreck
26 Oct 2019 20:29
Mine charged 300€ (about $320). They prepare everything, the KfW confirms, and then construction can start. The final invoice goes to the advisor, who forwards it. A little later, the money comes from the KfW. It’s straightforward and simply saves you money.
KfW has a list of who is eligible to apply.