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odw-bauen8 Jun 2020 17:13Hello everyone,
This is my first post here, and I would appreciate any help you can offer. If you need more information, please let me know.
A brief overview of my concern:
We started building our house at the end of 2017. The roof including the soffits made of three-layer wood panels was completed in mid-December 2017. Since last autumn, I have noticed discoloration on the soffits all around the house. It varies in intensity but is visible everywhere. So far, I haven't been able to find a definitive explanation. The shell builder, who installed the soffits and the roof, just said, "it's wood after all." Our architect mentioned moisture as a possible issue, but the source remains unclear.
The roof structure, from inside to outside, is as follows:
- Plasterboard ceilings
- Vapor barrier film
- 24cm (9.5 inches) rafters with insulation between rafters
- 6cm (2.5 inches) soft fiberboard
- Dörken Delta Foxx underlayment membrane
- Counter battens / lathing
- Nelskamp F 8 1/2 roof tiles
The soffits are attached at the eaves side by screwing them to the counter battens of the lathing; on the gable side, the lathing itself was used for fastening. The underlayment membrane also lies on the soffits.
The soffits were primed by the shell builder, but it seems only on the visible side, not on the end grains or top edges. The plasterer then applied two full coats of acrylic paint, according to him. I was not present during the painting and cannot currently prove otherwise.
I have taken several photos and hope they show the issue clearly. You can see yellowish to brownish discolorations, and hopefully also that the individual strips of the three-layer panels are quite distinct in some areas.
Is this just the wood absorbing the paint unevenly, or could there be a more serious underlying problem?
I look forward to your responses and thank you in advance.
This is my first post here, and I would appreciate any help you can offer. If you need more information, please let me know.
A brief overview of my concern:
We started building our house at the end of 2017. The roof including the soffits made of three-layer wood panels was completed in mid-December 2017. Since last autumn, I have noticed discoloration on the soffits all around the house. It varies in intensity but is visible everywhere. So far, I haven't been able to find a definitive explanation. The shell builder, who installed the soffits and the roof, just said, "it's wood after all." Our architect mentioned moisture as a possible issue, but the source remains unclear.
The roof structure, from inside to outside, is as follows:
- Plasterboard ceilings
- Vapor barrier film
- 24cm (9.5 inches) rafters with insulation between rafters
- 6cm (2.5 inches) soft fiberboard
- Dörken Delta Foxx underlayment membrane
- Counter battens / lathing
- Nelskamp F 8 1/2 roof tiles
The soffits are attached at the eaves side by screwing them to the counter battens of the lathing; on the gable side, the lathing itself was used for fastening. The underlayment membrane also lies on the soffits.
The soffits were primed by the shell builder, but it seems only on the visible side, not on the end grains or top edges. The plasterer then applied two full coats of acrylic paint, according to him. I was not present during the painting and cannot currently prove otherwise.
I have taken several photos and hope they show the issue clearly. You can see yellowish to brownish discolorations, and hopefully also that the individual strips of the three-layer panels are quite distinct in some areas.
Is this just the wood absorbing the paint unevenly, or could there be a more serious underlying problem?
I look forward to your responses and thank you in advance.
HausiKlausi11 Jun 2020 22:48I don’t think the color has disappeared into the wood, but rather the opposite. What you see is coming from the wood itself: residual moisture and resin that have worked their way out after 3 years. It’s probably not a big issue—but not something to claim a complaint about either. However, it still doesn’t look like three coats of paint.
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