Retrofit project planning starting with underfloor insulation

[Tim_Gilbert]

@Christian_Unger

Would be great to find a builder that knows already about the details of underfloor insulation, taping things up for air tightness etc

That is everyone’s wish. You will be exceptionally lucky to succeed!

You may find this thread useful.

Pros and cons of different types of underfloor insulation

My planned underfloor insulation and airtightness work has stalled due to suspended wooden floor timbers showing high moisture readings, mostly in the front wall of the original parts of the house (which happens to be south facing). I’m slowly addressing some of the problems identified, but improving airflow before insulating isn’t proving as simple as it sounds. The house is detached with filled cavities on E/S/N walls. The W facing wall has a finger cavity. Joists run N-S along the longer wa…