Special Holiday Offer2 Gifts for $16It’s Like Getting One Free!
I see tom using shims that are shaped like a fork having two tines. The screw gets driven between the two times so the material is supported. Where can I find these? My local hardeare store wasn't familiar with them.
They were probably plastic shims furnished by the window manufacturer. But I can see no advantage of those over regular wooden shims. Here's one manufacturer. http://www.silplastic.com/products/shims-plastic.php