Two unrelated questions: could they install soundproofing for the core building that needs quiet and will the skaths recognize Richter when he returns? Just wondering if we’ve discussed these before.
Don't think so. As for Sound Proofing the Forge then something like a Macro Enchantment of Muffle or other Sound Dampening Enchantment placed on the Forge should do it, or otherwise a number of smaller Enchanted Items/Charms placed all around the Forge and Cauldron should also have a similar effect. The Skaths should recognise him as long as he gets back in less then a month or so no bother, after that it might be a bit trickier but he should be able get them to recognise him again with a little effort, particularly with the Imprinting.
The Cauldron can upgrade it's self with points he can probably just ask it for sound proofing and see how many points it costs, or ask the forge for a noise dampening effect or both depending on cost