We are buying our first home and it's a shell currently and it's roughly 70 years old.
I want to insulate the house as much as possible and I came up with an idea for a multi-layer approach for improved thermal insulation. I've come up with a sequence of layers and wanted to get your thoughts on its feasibility, effectiveness, and any possible improvements.
Proposed Layers (From bottom to top): Concrete Floor Base Thermal Insulating Paint Tile Adhesive XPS Board (10mm) with tape on the seams Contact Adhesive OBS Board (5mm) or Optional Plywood Thermal Paint Vinyl Sheet Flooring (4mm Padded)
Questions: Moisture Concerns: Have any of you had experience dealing with moisture issues when layering over old concrete? Should I be concerned about trapping moisture between these layers?
Material Compatibility: The XPS board can't interact with solvent-based adhesives. Is a water-based contact adhesive sufficient for securing it?
R-Value Goals: The combined estimated R-value of these layers is approximately 0.832 K·m²/W. Is this a reasonable R-value target for thermal insulation on a concrete floor in the UK's climate?
Additional Insulation Ideas: Are there other materials or techniques you'd recommend to enhance the insulation capabilities of this floor?
Code Compliance: Are there any building code considerations I should be aware of for this type of multi-layered flooring?
Durability: Given foot traffic and general wear and tear, how durable do you think this setup would be?
Cost-Effectiveness: Lastly, does this seem like a cost-effective method for enhancing insulation and comfort?
Any insights, advice, or alternative ideas would be greatly appreciated!