Build in old wall

[gubblurven]

Hello!

After much consideration, I have decided to replace the entire heating system in our new project. I will embed pex pipe and redo all the electrical work, and at the same time add insulation from the inside. Currently, the walls consist of a log frame + clay plaster + masonite boards. Are there any disadvantages to building the new wall directly on the old one so that I don't have to chip away all the clay plaster, etc.? In other words, framing directly on the old wall.

Best regards

 

[HeleneP]

Hello!

After much consideration, I have decided to replace the entire heating system in our new project. I'm going to install PEX piping and redo all the electrical wiring while also adding internal insulation. Currently, the walls consist of log construction, clay plaster, and Masonite boards. Are there any disadvantages to building the new wall directly on top of the old one so that I don't have to chip away all the clay plaster, etc.? In other words, building directly on the old wall.

Regards

Not an expert, but that's what we did over 20 years ago. We removed the Masonite but left everything that couldn't be brushed away, clay plaster, moss, and rags. We put up framing, both to make it a bit straighter and to insulate. When we opened it up to fix a little (installed a double balcony door instead of a window) last summer, the logs were still really nice and fresh.

Now, some say you shouldn't insulate log constructions, but that's what we did, with a vapor barrier and the whole shebang since it's a permanent residence. And as I said, it looks fine after 20 plus years. I regret certain things in that renovation, but that part still feels okay. To be honest, the biggest gain was probably making it airtight and having reasonably straight walls rather than the insulation itself.

Helene