H
Henry Bungalow29 Mar 2023 21:48Hello fellow builders,
we are currently constructing a house with external thermal insulation composite system (ETICS), and we believe the transition between the roof and the masonry is not done correctly. Our bungalow is supposed to have a warm roof.
Current situation that makes us very suspicious.
See pictures:
This can’t be right, can it?
We wonder how they will properly plaster this later?
At the moment, we can no longer find a solution with the construction company!
There is also no wooden layer on the rafters, as shown in the image from the insulation manufacturer Sto.
How should a warm roof be sealed at the junction between the roof and masonry?
Unfortunately, I can’t find any information online except for the drawing from STO.
We had already complained about the base insulation because it was initially installed 5-7cm (2-3 inches) below ground level. After lengthy discussions, this was resolved by adding a second row of base insulation.
Conditions:
We are building a bungalow with a warm roof.
I would greatly appreciate a quick response.
we are currently constructing a house with external thermal insulation composite system (ETICS), and we believe the transition between the roof and the masonry is not done correctly. Our bungalow is supposed to have a warm roof.
Current situation that makes us very suspicious.
See pictures:
This can’t be right, can it?
We wonder how they will properly plaster this later?
At the moment, we can no longer find a solution with the construction company!
There is also no wooden layer on the rafters, as shown in the image from the insulation manufacturer Sto.
How should a warm roof be sealed at the junction between the roof and masonry?
Unfortunately, I can’t find any information online except for the drawing from STO.
We had already complained about the base insulation because it was initially installed 5-7cm (2-3 inches) below ground level. After lengthy discussions, this was resolved by adding a second row of base insulation.
Conditions:
We are building a bungalow with a warm roof.
I would greatly appreciate a quick response.
B
Bausparfuchs29 Mar 2023 22:28So, what exactly did you order? Rafter insulation means rafter insulation. If it’s not installed, the roof will be uncovered and redone. You’re paying for the insulation anyway.
Applying external thermal insulation composite system (ETICS) like that is poor workmanship. Why isn’t the polystyrene cut and fitted properly? It probably takes too long.
You can plaster it neatly. However, I don’t see effective insulation there. Does the company doing the work even have a proper polystyrene cutter? You should check that.
In any case, I would plaster it as soon as possible, otherwise birds will start nesting. They like this material and will peck the polystyrene away very quickly.
They will probably foam it from behind as well. Once the plaster is applied, you won’t see anything anymore.
Applying external thermal insulation composite system (ETICS) like that is poor workmanship. Why isn’t the polystyrene cut and fitted properly? It probably takes too long.
You can plaster it neatly. However, I don’t see effective insulation there. Does the company doing the work even have a proper polystyrene cutter? You should check that.
In any case, I would plaster it as soon as possible, otherwise birds will start nesting. They like this material and will peck the polystyrene away very quickly.
They will probably foam it from behind as well. Once the plaster is applied, you won’t see anything anymore.
H
Henry Bungalow31 Mar 2023 05:50Bausparfuchs schrieb:
So, what exactly did you order? Above-rafter insulation means above-rafter insulation. If it’s not installed, the roof will have to be uncovered and redone. You’re paying for the insulation anyway.
The external thermal insulation composite system (ETICS) version is shoddy work. Why isn’t the expanded polystyrene (EPS) cut and fitted properly? Probably takes too long.
You can plaster it neatly, sure. But I don’t see effective insulation here. Does the contractor even have a proper EPS cutter? You should check on that.
In any case, I’d plaster it as soon as possible, otherwise birds will nest there. They like this stuff and can peck the EPS away in no time.
Most likely, they will foam it from behind as well. Once the plaster is on, you won’t see anything anymore. Bausparfuchs schrieb:
So, what exactly did you order? Above-rafter insulation means above-rafter insulation. If it’s not installed, the roof will have to be uncovered and redone. You’re paying for the insulation anyway.
The external thermal insulation composite system (ETICS) version is shoddy work. Why isn’t the expanded polystyrene (EPS) cut and fitted properly? Probably takes too long.
You can plaster it neatly, sure. But I don’t see effective insulation here. Does the contractor even have a proper EPS cutter? You should check on that.
In any case, I’d plaster it as soon as possible, otherwise birds will nest there. They like this stuff and can peck the EPS away in no time.
Most likely, they will foam it from behind as well. Once the plaster is on, you won’t see anything anymore. Hello,
Thank you for the quick reply!
I ordered cavity insulation between the rafters.
Bausparfuchs schrieb:
So, what exactly did you order? Above-rafter insulation means above-rafter insulation. If it’s not installed, the roof will have to be uncovered and redone. You’re paying for the insulation anyway.
The external thermal insulation composite system (ETICS) version is shoddy work. Why isn’t the expanded polystyrene (EPS) cut and fitted properly? Probably takes too long.
You can plaster it neatly, sure. But I don’t see effective insulation here. Does the contractor even have a proper EPS cutter? You should check on that.
In any case, I’d plaster it as soon as possible, otherwise birds will nest there. They like this stuff and can peck the EPS away in no time.
Most likely, they will foam it from behind as well. Once the plaster is on, you won’t see anything anymore. Hello,
First of all, thank you very much for the quick feedback!
I ordered cavity insulation between the rafters, but it seems to me that the ventilation is happening at the roof tiles.
Since the insulation and rafters are the same height and are going to be covered airtight with vapor barriers.
They did have a proper cutter!
I also mentioned this, but according to the company's supervisor, they have been doing it this way for 20 years. So they have probably been doing it wrong all along.
Luckily, no birds have appeared yet because there is a lot of noise around us. We’ve been discussing this for two weeks now.
I have now issued a work stoppage before plastering and will get an expert opinion!
Any further advice would be greatly appreciated!
Best regards
B
Bausparfuchs31 Mar 2023 07:37Construction halts, lawyers, and expert assessors are always the worst solution. Your build may now be delayed for months. The birds will peck away your styrofoam insulation, and in the end, you could face greater damage than otherwise.
I don't see any point in that.
There is often poor workmanship among ETICS (External Thermal Insulation Composite System) specialists. This entire system was largely introduced so that unskilled workers could perform these tasks, which then could be charged at a higher price.
Solid construction without ETICS demands much more from the workers. Here, conventional methods with concrete and mortar are still required, not just construction foam. In particular, the plastering work is significantly more complex than the thin-bed adhesive used in ETICS.
Why didn’t the company simply measure the angle carefully with a bevel gauge, cut a wedge, and glue it in? That would have been done properly. Most likely, the construction company will fill the open space between the insulation and the roof slope with foam. Then it will be acceptable.
And if you ordered insulation between rafters, you cannot expect insulation over rafters.
In general, I am not a fan of these airtight houses where every millimeter is sealed with foil, tape, and construction foam. This is definitely not healthy building. A house needs to be able to breathe.
I don't see any point in that.
There is often poor workmanship among ETICS (External Thermal Insulation Composite System) specialists. This entire system was largely introduced so that unskilled workers could perform these tasks, which then could be charged at a higher price.
Solid construction without ETICS demands much more from the workers. Here, conventional methods with concrete and mortar are still required, not just construction foam. In particular, the plastering work is significantly more complex than the thin-bed adhesive used in ETICS.
Why didn’t the company simply measure the angle carefully with a bevel gauge, cut a wedge, and glue it in? That would have been done properly. Most likely, the construction company will fill the open space between the insulation and the roof slope with foam. Then it will be acceptable.
And if you ordered insulation between rafters, you cannot expect insulation over rafters.
In general, I am not a fan of these airtight houses where every millimeter is sealed with foil, tape, and construction foam. This is definitely not healthy building. A house needs to be able to breathe.
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