ᐅ Facade insulation on a semi-detached house: what and how approval from neighbors is required
Created on: 9 Apr 2018 08:56
E
erogluoe
Hello dear forum members,
I have some questions regarding the renovation of my semi-detached house that I am planning and hope you can assist me with.
I want to have my semi-detached house insulated according to KfW standards.
According to the declaration of division, the two semi-detached units are completely separate from a legal point of view.
However, in my case, the roof needs to be extended by about 2 to 3 rows of tiles so that the insulation is also protected from above.
At the same time, the roof gutter between my property and my neighbor’s must be adjusted so that rainwater can continue to drain properly.
Additionally, the plasterer recommends installing insulation extending slightly (about 50cm (20 inches)) beyond my property boundary onto the neighbor’s side to avoid thermal bridging.
In which cases do I need my neighbor’s permission? What should such permission look like?
Is there a template letter available in this forum that I could use as a guide for wording?
Thank you in advance for your possible answers.
Thanks
I have some questions regarding the renovation of my semi-detached house that I am planning and hope you can assist me with.
I want to have my semi-detached house insulated according to KfW standards.
According to the declaration of division, the two semi-detached units are completely separate from a legal point of view.
However, in my case, the roof needs to be extended by about 2 to 3 rows of tiles so that the insulation is also protected from above.
At the same time, the roof gutter between my property and my neighbor’s must be adjusted so that rainwater can continue to drain properly.
Additionally, the plasterer recommends installing insulation extending slightly (about 50cm (20 inches)) beyond my property boundary onto the neighbor’s side to avoid thermal bridging.
In which cases do I need my neighbor’s permission? What should such permission look like?
Is there a template letter available in this forum that I could use as a guide for wording?
Thank you in advance for your possible answers.
Thanks
D
Deliverer9 Apr 2018 13:14Alex85 schrieb:
The original poster wrote that they will insulate according to KFW standards. This means they are energetically refurbishing the existing building to the KFW 55 level of a new build. Halving heating costs is therefore quite possible, but the forecast should be provided by the involved energy consultant.No, no, no. Let’s not mix apples and oranges here!
Yes, if everything is renovated, you might achieve a 50% reduction. But the cost of 21,000 only covers the facade (and the necessary roof extension). Since roughly 30% of heat loss occurs through the facade, and you can maybe prevent 70% of that, you can’t save 50% on heating costs just by that. It’s closer to 20%.
Therefore, I have to revise my rough estimate from a few posts ago: the return on investment (ROI) is somewhere around 80 years. Unfortunately, the insulation doesn’t last that long.
But the original poster didn’t ask about this. Sorry for going off-topic.
Deliverer schrieb:
No, no, no. Let’s not mix apples and oranges here!
...
Therefore, I need to revise my rough estimate from a few posts ago: the return on investment is around 80 years. Unfortunately, the insulation doesn’t last nearly that long....
But that’s not what the original poster asked. So sorry for going off-topic.If it’s EPS or a similar material, it will outlast you and probably the rest of the house by many, many years (assuming it was installed correctly). Otherwise, our oceans would have been automatically free of plastic by now.
M
Mastermind19 Apr 2018 13:51Tego12 schrieb:
If EPS or similar materials are used, they will likely outlast both you and the rest of the house by many, many years (assuming they were installed correctly). Otherwise, our oceans would soon be free of plastic again automatically. Who knows if EPS will be considered the new asbestos in a few years and might even have to be forcibly removed from walls someday... But that is off-topic. If I say now that we have wood fiber insulation boards...With such a large investment amount and issues with neighbors and property boundaries, there is unfortunately never a 100% perfect solution. I would allocate the money differently...
Is the heating system due for replacement? Are the wooden windows maintenance-intensive? Are the roof panels possibly due for replacement?
Cold spots...
I would prioritize
New heating system
Photovoltaics (possibly combined with a domestic hot water heat pump, which also dehumidifies the basement)
New windows, new front door
Insulating the roller shutter boxes
....
D
Deliverer9 Apr 2018 13:52Tego12 schrieb:
... the material will outlast you and probably the rest of the house by many, many years That’s true, but can I re-plaster the house after 60 years without the insulation coming loose?
Mastermind1 schrieb:
Before that, I would consider
New heating system
Photovoltaic panels (possibly combined with the domestic hot water heat pump – which also dehumidifies the basement)
New windows, new front door,
Insulating the roller shutter boxes
....In short: Only once EVERYTHING else is done AND the money is no object, would I consider adding external wall insulation.
Well, that’s not exactly the most economical approach if you start with the heating system first. Insulation significantly changes the heating demand. Ideally, you do both as a package.
I would only install the heating first if you don’t plan to insulate.
Even a door costing 3,000-5,000 euros doesn’t bring nearly as much energy efficiency as external wall insulation. That “adjustment” is one of the most effective ways to reduce energy consumption.
But there are professionals for that.
I would only install the heating first if you don’t plan to insulate.
Even a door costing 3,000-5,000 euros doesn’t bring nearly as much energy efficiency as external wall insulation. That “adjustment” is one of the most effective ways to reduce energy consumption.
But there are professionals for that.
Above all, it is by no means just about the simple calculation of "cost of insulation" versus energy savings. Using that argument alone, not a single ventilation system would be sold, let alone a fireplace or anything else...
1) Comfort gain! Living in a well-insulated house offers a huge comfort advantage. Even temperature, no hot or cold spots inside the house, no cold radiation through the walls... it is significantly more pleasant to live there.
2) When calculating economically, as already mentioned, the value of the house must also be considered. Hardly anyone wants to buy an uninsulated property anymore... the value of a house increases through good insulation and thus higher comfort and better energy efficiency...
1) Comfort gain! Living in a well-insulated house offers a huge comfort advantage. Even temperature, no hot or cold spots inside the house, no cold radiation through the walls... it is significantly more pleasant to live there.
2) When calculating economically, as already mentioned, the value of the house must also be considered. Hardly anyone wants to buy an uninsulated property anymore... the value of a house increases through good insulation and thus higher comfort and better energy efficiency...
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