Room reflectances, Visual Interior Tool?

[Favguy]

Hi again,

When using the Visual Interior Tool, what would be the best % figures to use for open rafters with a black roof liner, matt/eggshell white walls, & light grey floor paint please? (The 5ft twin LED striplights I'm using will have white metal reflectors behind the tubes to help throw the light back down.)

Thanks.

 

[Platonic Solid]

Wow! Black roof liner! That's a first for me. Ceiling|Wall|Floor = 0|50|25

 

[Favguy]

Many thanks

It's the way we build roofs in the UK. Quite different from the US.

The usual procedure is roof trusses, then a waterproof liner, (often black in colour) followed by roofing battens with either concrete or clay overlapping tiles hung over them. In a house (and some garages), you'd then have a plasterboarded & painted ceiling, but (for now at least) mine will be left open rafters as is the case for most garages over here.

We don't have to worry about insulation as much either as there's no real extremes of temperature here.

 

[Platonic Solid]

Got it. Please post pics. Always cool to see construction techniques from other countries.

White metal reflectors behind LED tubes won't do much since most LED tubes have a 120° aperture. Standard no-reflector strip lights will yield the same result and save a few bucks.

 

[Favguy]

The tubes I'm using, Lumilife, have a 200 degree beam angle, so hopefully the reflectors will have a small benefit as I've already bought them! If nothing else, the fittings look nicer with them on I think, lol!!