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- Oliver: When we about renovation, people directly heat pump, new windows or a complete facade insulation. But there is one measure that will be overlooked, although it fast, cheap and quite effective. The core insulation. But when can you use What do you do with What does And is the whole thing also funded? I'll that today in the podcast with Alexey. Alexey, let's start with what is core insulation? Simple. In core insulation, insulation material is into a existing hole space, for example into a wall and thus the building. This happens, for example, with two-shell walls, but you can this anywhere where you a hole space. So you practically a kind of space in the wall, you say. Exactly. in older buildings in is very common, especially in the case There are often two-shell walls. And when there air in there, circulates in And that's where lot of heat is If you in this existing hole, it's much better. Now we have two points that I add. Once the topic of region, because you just mentioned and then just the topic of wall, just Many people just of facades. Can you that only there? No, as I said, basically with every rest area of buildings, can basically do a core insulation first. This is especially the with the roof, with the top bullet ceiling, can also with the basement ceiling or the floor. But typical thing is the outer wall and ... Speaking of regions, because of rain in they started building two-shell walls on, so that moisture that comes from outside can't get into the building. We can use that to blow Now, although I live I've a new word, which heavy rain. But we'll back to the core or the blower. How do I to in detail? How is this done? Usually, you drill holes in the wall. They are not particularly big, about 2-3 cm in diameter. Usually, you in the fumes. Then you it relatively easily when you it from the outside. Alternatively, can it from the inside. This a bit on the other renovations that you are or not planning, what makes And if you these holes, a with lot of pressure. There are few different variants. And the rest of the which is very important, completely blown by this shock absorber. So that the wall is stamped. So that sounds relatively easy at and also relatively fast, Is that a standard procedure Usually you can it quite easily and that goes pretty fast. With most buildings, are not large family houses, you are after half a day. There are now a few different There of damping. You can use either inflating damping, that's for example mineral wool or EPS balls. There also the possibility that you foam there. This has disadvantages, in the rule such an inflating damping is used A third variant, is theoretically available, is not negatively implementable These dam plates or mats that to the inner shell of the facade, the inner wall, so to speak. But since they mats, you them in That makes sense. And if we the new building now, then you can probably say that blowing is almost always the practice. Now, very skeptically formulated, you used an open air layer. That was also intentional. That's It depends on what you want to We have a very strong focus on the energy aspect of a building. And if you it from that perspective, no, that's not The U-value that we are always interested in, how much heat is over the wall, can that by blowing out a hollow space that is with air through vapor. And that's just... That sounds good. You just mentioned EPS balls. You mineral wool. What is into the wall? And do you take what material? There are basically several options. The main differences between the materials are... Something like the material class. It's about how good the material that you blow is. How many inlet openings do you have to per square meter. It course especially important if something is worked So when processing from the outside, you the holes more. Then it also very important how many centimeters or millimeters must be least available at high levels and what does this material We'll in but basically there is the materials, mineral wool, has the advantage that it not burnable and has relatively good evaporation. Then there is the possibility to EPS balls or EPS pearls. They are quite light, they are also cheap, usually cheaper than mineral wool and are little better Then is the possibility to cellulose. This is a very sustainable dam material that also relatively high mass. So it's always to in the roof because it in heat protection. There are also special things like aerogel, which very good damming but also expensive. Or per litre. Probably the list goes much further, but in practice it is usually used in of these dyes that I listed. So there is no one fits all solution? No, one fits all But depending on purpose of is the best solution. In the roof, I said, is more like cellulose. In the facade it is often mineral wool. But there one fits all solution. Okay, now you said that the actual lever If I say that this quickly, it relatively cost-effective to Can I just start or what exactly to checked Yes, you have the question yourself. Very important. You have to it carefully beforehand what is possible. So what are the questions that most? Is there a space Then is this space available everywhere? How strong is the hole? Are there areas where the hole is with something. can in construction debris in the implementation. Or a lot of mertel used. All of could be to build heat bridges. Then we also in whether the hole is dry. Because if we blow and it wet, then can the dam directly. It's better if you leave How is the fume? Especially with a two-shell wall, without cleaning, is that another topic? And how do the connections to the windows look? All that you can look at if you several places and an endoscope in it. What's an endoscope? A camera with light? Then you more. Well, then we just don't blindly, I think say. Then we're both in Hamburg, about topic of rain. I've already mentioned that I'm into my active language. We also colleagues who are in Munich. I don't the feeling that they're a lot in area nuclear dams. So is that more a regional issue? Yes, that's a regional-focused topic, I would say. Then let's to the decisive question, after we said, who is it what do you have check? And what are That's always the question of the costs. what does that What does it really Since it's about the facade here and the facade makes a relatively large area of the building, can save 15 to 40 percent heating costs. Of course, that on what the other components look like. Before and after effect. What does that So 20 to 30 euros per square meter. So have typical family house with free sqm facade of 3-4.000-4.500€. And that's before the funding. Of course, is also funding for Before we the funding, I have one topic that still concerns me. We're something into the wall. That has to go up to the top and I have to make that no... So it shouldn't uneven, right? What would happen Or how could you prevent Exactly, you shouldn't fill the facade unevenly, because then you wouldn't a wall that dampened and would cause more heat in the building And that can the worst case. The easiest thing is to how much insulation goes in, how much hole space I have. It's basically just a square with a strength and have a certain area and then I estimate how much insulation has in. And if it's a few hundred cubic meters less, it's kind weird. That would the easiest thing. A thermal imaging camera can at cold temperatures. Well, let's to my favorite topic. We have seen what it what I again, so is it funded, what conditions is it funded, what do I have to pay and what is there? Yes, conditions are actually relatively simple You have to a shock absorber that least a thermal conductivity of 0.35. That means that the insulation has a thermal conductivity of 0.035. And then it's basically sustainable. The U-value doesn't really matter. And what does 20%. Does it give? Up to 20 % you from the Wafa if you an ISFP. Without an ISFP it's 15%. And if you for funding, for example here in Hamburg, up to 40%. On my example from earlier, said... 3000 euro gibt man aus 1200 euro kriegt man dann förderung eigentlich ein ziemlicher no brainer wenn es möglich ist also tatsächlich wenn man jetzt immer die wirtschaftlichkeit betrachtet wenn das ganze jetzt für ein familienhaus so zwischen drei und vier und hausen euro liegt und ich je nachdem wo ich jetzt gerade bin mal im maximum 40 prozent zurück kriege dann ist die amortisation ja wirklich eine sehr einfache rechnung These so few years that inflation probably doesn't matter at The measure is very cheap, implemented You don't even change the exterior of your building. That means it looks exactly the same before. You don't space, you still good energy savings and you actually bit. So actually almost only advantages. That sounds like a lot of stuff about the damping methods. But I have to ask again, are there any that you on the screen? That's not with every building. I have have a hole space first. The hole space has to be big enough. It on the damping material, but from 30 mm to 3 cm it will be interesting. if you don't properly, the is blown then can cause problems but I think relatively simple things that you can And then you as a disadvantage, but you can not as a disadvantage. The damping effect is course less than when I a WD-VS So I can't a 20 cm damping or 16 cm damping in there. Accordingly, it won't that good, but The first centimeter of always the most, so rather a core damping than no damping if the WD-VS is too expensive. WD-VS, we might to the very short end, maybe as outlook, but I already that you have to strengths and the So you can say that there more conditions that it really worked than the real disadvantages. That's you can probably say that this is a very smart method if you these conditions. You just said WDVS, so that doesn't the facade insulation. No, that doesn't the facade insulation. We don't up with such good thermal permeability coefficients, U-values, as you with a WDVS. But as I said, first centimeter insulation always the most. I The first centimeter insulation is always the most So are different materials, are different scenarios, I think there are also different goals. But if you really look that it's not just about the technology, but also about economy, funding strategy and overall planning, then you it very, very well. And I would then underline that core insulation is not a spectacular measure, but then often one of the most implemented very, very cheap and then with lot of So if you an older building, then the view is definitely A few words from me My name is Michael Suhr. am the founder and business manager of Reneva. We Reneva also know how complex energy repairs are today. Full of craft calendar, countless technical possibilities and a driving jungle that many owners rather brake than motivate. This is where we stand. We connect energy management, qualified craft industries and digital processes to a clearly structured system. For your budget, we the best possible repairs for your property. We you highest possible funding and accompany you from the initial analysis to the implementation with only one permanent contact partner. If you want to what your real estate is worth, then start the first step now. Visit us at Renewadie and arrange an unconditional consultation.