WEBVTT
Kind: captions
Language: en-GB

NOTE
This clip has no narration. These captions describe what happens on screen,
second by second, so the video is usable without sound and its content is
readable as text. Written from frames extracted from the MP4 itself.

u-value-calculator-1
00:00:00.000 --> 00:00:05.000
U-Monkey opens on its element picker — no sign-up: wall, roof with insulation at rafter, roof with insulation at ceiling, flat roof, exposed floor, ground floor to ISO 13370 and suspended ground floor.

u-value-calculator-2
00:00:05.000 --> 00:00:07.000
“See a worked example — a full cavity wall, calculated for you” is tapped.

u-value-calculator-3
00:00:07.000 --> 00:00:08.000
One tap loads the build-up: brickwork outer leaf 102 mm, mineral wool slab 150 mm, aircrete block 100 mm.

u-value-calculator-4
00:00:08.000 --> 00:00:12.000
The layers stack up with a live cross-section drawing itself alongside, labelled outside to inside, under a New build / New element / Upgrading existing selector.

u-value-calculator-5
00:00:12.000 --> 00:00:15.000
The U-value reads 0.21 W/m²K instantly, with the compliance chips beside it: Part L limit 0.26 met, notional 0.18 not met. (An older recording: the 0.15 FHS chip shown here is gone; the adopted standard keeps 0.18.)

u-value-calculator-6
00:00:15.000 --> 00:00:20.000
“Hit a target U-value…” auto-solves the insulation. The tool answers: you need 180 mm of mineral wool slab to reach U = 0.18.

u-value-calculator-7
00:00:20.000 --> 00:00:25.000
The build-up updates to 0.18 W/m²K and the badge flips to “Meets Part L notional”, with the ISO 13788 mould check reading f_Rsi = 0.96 ≥ 0.75 and the Building Control-ready PDF free to download.

u-value-calculator-8
00:00:25.000 --> 00:00:27.910
Closing card — U-Monkey, the free U-value calculator, BS EN ISO 6946 and BR 443, with live Part L and Future Homes checks.