Honestly? Just slap on the thicker insulation and enjoy a better insulated house. The price difference will be marginal (processing costs are identical).
Well, the price for the insulation is definitely much higher (I checked myself two weeks ago) almost a 100% markup. But with that volume, it might be around 1000-2000 EUR and when you consider the entire house construction, that's just peanuts.
Well, the price for the insulation is definitely significantly higher (I checked myself two weeks ago) almost 100% surcharge.
Someone wants to rip you off. 18cm Neopor WLG 32 is about 10% more expensive than 18 cm Neopor WLG 35. Then simply 20cm WLG 32 for another 10% more. ==> current price (there has actually never been such a big difference)
Wasn't there something similar recently with PUR/PIR WLG 023?
That's right - smartbau in Nettetal was mentioned. There you get the 023 board for 20% less (than the 35 EPS), but it's laminated with aluminum/paper. That's quite something. I love this dealer (or his neighbor, who has similar prices but also sells other things).