ᐅ Ceiling construction with exposed beams – who has experience with this?
Created on: 6 Jul 2018 13:31
W
wilsumerHello everyone,
we need your help again with our renovation project (converting a barn into living space). During the summer holidays, we will start working on the ceiling. Here is a brief description:
We are only remodeling the ground floor. Upstairs, the ceiling will just be accessible with rough-sawn boarding. We have planned the construction as follows.
The old wooden beams will remain visible from below. On top of these, gypsum plasterboards will be installed. These will be screwed to OSB boards for stability. On top of that, KVH beams will be placed again. The space between will be insulated with Isover insulation batt. Then the rough-sawn boarding will be fixed on top. Our question is, what do you think of this construction? Would you add a membrane? If yes, where? What else should we definitely consider? In the bathroom and guest WC, of course, use moisture-resistant gypsum plasterboards.
We have already requested a quote. The scope of work is as follows:
Existing beam structure covered with 12mm (0.5 inch) gypsum plasterboards, 22mm (0.9 inch) OSB boards installed as vapor barrier including sealing tape, and gypsum plasterboard fastened to the OSB. KVH beams 6 x 20cm (2.4 x 8 inches) mounted perpendicular to the existing beams and insulated with 20cm (8 inches) insulation batt 032. Deliver and install 24mm (1 inch) rough-sawn boards on the new beam structure.
Thank you very much for your help!
we need your help again with our renovation project (converting a barn into living space). During the summer holidays, we will start working on the ceiling. Here is a brief description:
We are only remodeling the ground floor. Upstairs, the ceiling will just be accessible with rough-sawn boarding. We have planned the construction as follows.
The old wooden beams will remain visible from below. On top of these, gypsum plasterboards will be installed. These will be screwed to OSB boards for stability. On top of that, KVH beams will be placed again. The space between will be insulated with Isover insulation batt. Then the rough-sawn boarding will be fixed on top. Our question is, what do you think of this construction? Would you add a membrane? If yes, where? What else should we definitely consider? In the bathroom and guest WC, of course, use moisture-resistant gypsum plasterboards.
We have already requested a quote. The scope of work is as follows:
Existing beam structure covered with 12mm (0.5 inch) gypsum plasterboards, 22mm (0.9 inch) OSB boards installed as vapor barrier including sealing tape, and gypsum plasterboard fastened to the OSB. KVH beams 6 x 20cm (2.4 x 8 inches) mounted perpendicular to the existing beams and insulated with 20cm (8 inches) insulation batt 032. Deliver and install 24mm (1 inch) rough-sawn boards on the new beam structure.
Thank you very much for your help!
Plasterboard placed between the two layers of joists, so it is subject to compressive stress at least from the self-weight of whatever is on top — I can understand if that leaves someone speechless ;-)
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Specialized topics like which vapor retarder to use and where are definitely not my area of expertise, so I can’t suggest a precise assembly for you. However, I would avoid applying any load to drywall. So you understood me correctly: keep it out of the load path between the upper and lower structure. Accordingly, only place it in the intermediate spaces, yes.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Thank you for your reply.
Hmm... that doesn’t really make the situation any easier. The extra effort required to install the drywall from below and constantly trim it (since the beams are, of course, anything but straight) is definitely significant. I’m not saying you are completely wrong—I can fully understand your reasoning—but what surprises me is that I had two master craftsmen on site (both highly respected in their region) and both suggested the approach I described.
This really makes me pause. Perhaps an expert in this field might see this post and share their opinion.
Hmm... that doesn’t really make the situation any easier. The extra effort required to install the drywall from below and constantly trim it (since the beams are, of course, anything but straight) is definitely significant. I’m not saying you are completely wrong—I can fully understand your reasoning—but what surprises me is that I had two master craftsmen on site (both highly respected in their region) and both suggested the approach I described.
This really makes me pause. Perhaps an expert in this field might see this post and share their opinion.
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