As far as the arches it was a local craftsman i found when googling arch trim austin texas i live in the austin area.
Arched window trim install.
The trim is nailed directly to the window jamb.
Installing a 5 trim for more details on how to install arch trim around your windows read about this arch molding installation.
As far as adding them i literally just nailed them on following the arch of the window.
Then line up a straight edge with the marks and draw the cut lines.
Placing the window stool in start by placing one of the side trims against the side of the window.
How to install arched window trim step 1.
In this installation the et 8751 polyurethane molding was used to surround the window with 5 of trim.
To make the cuts on a miter saw support the free end of the circular trim in back of you.
Pre installation considerations the radius of the semicircle within a half round is exactly half of the diameter.
Two pieces were cut and reconstructed to create the arch above the eyebrow window.
On both sides mark where the circle starts to turn in.
First clamp the arched trim to the jamb making sure the reveal is consistent along the jamb.
The cost was around 240 total if memory serves me right i have a memory of 80 window.