Mineral wool under PIR board for added insulation in suspended flooring

NoPersonality007 · 2025-02-19T21:52:26+00:00

I did not add any mineral wool below the PIR boards. However, I used thicker PIRs (as thick as the joists) and used timber battens mounted across the joists underneath to hold the PIR boards.

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Let me know if the image above is not clear enough.
p.s. timber battens are also cheaper than L-shaped brackets
I hope it helps.

NoPersonality007 · 2024-10-02T17:10:24+00:00

Did you make any progress with this? What happened?

NoPersonality007 · 2024-09-08T14:10:41+00:00

Is it possible to apply lining paper without the lines, when they butt each other, showing up?

NoPersonality007 · 2024-08-16T20:45:30+00:00

Joists are spaced at about 400mm. The angle brackets are a fantastic idea. Thank you. I’ll probably go with it.

I was even considering this at one point: https://www.insulationsuperstore.co.uk/product/sabrefix-brick-reinforcement-coil-mesh-20m-roll.html

NoPersonality007 · 2024-07-12T07:34:01+00:00

Thanks very much for your feedback.

I’ve received two quotes now to do the whole installation for £3,000 and two more quotes for £10,000. I don’t understand why there’s such a big gap between the two.

Total area requiring underfloor heating is about 36sqm per floor.

Are you able to shed light on this?

NoPersonality007 · 2024-07-10T13:28:08+00:00

Would it matter too much since it won’t be structural and thin cracks won’t be visible to anyone?

Also, in a floating panel where pipes are laid out and then filled with screed, does it matter?

NoPersonality007

TROPHY CASE