[Shop-talk] Filling large gaps in wood?

[BJNoSHOV8]

I was going to suggest filling the gaps with strips of wood, maybe 
tapered strips of wood, then caulk/tape and bed what remains.  I've cut 
long tapered strips of wood on my table saw using the rip fence.  I 
nailed one strip of wood on top of another strip, with the top strip 
angled slightly and the edge of the top strip running against the rip fence.


> I boxed in some basement windows in a very not-square house, and there are
> some gaps between the boxes and the casing molding that rests on the sheetrock
> walls, some as large as 1/2". The homeowner would prefer the gaps filled in
> and smoothed out rather than me laying a piece of molding over it. Since the
> gaps have no bottom, I thought I'd create a bottom with some minimally
> expanding foam and then fill the remainder with Bondo. I'm sure caulk would
> require many layers to stop shrinking, drywall mud would crack and wood
> filler...no idea but it has never worked well for me in smaller
> applications...
>
> I'm open to the more experienced options before I revisit this brain cell
> massacre of my teenage years.