GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Best practices on window sill attachement

4khz | Posted in General Questions on

What is the best way to attach the sill ? The attached pic is a mock up I’m doing on a 4′ wide window, but I also have 10′ wide window/door openings. On the rough opening I have flashing tape / sill pan. I plan on using vertical grain 1x cedar for my sill. 

My initial idea is to lay beads of compatible adhesive and add a few screws w/plugs to hold it down and keep it from bowing out. The sill flashing is Exoseal and not so stretched in the area for the screws.

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.


Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |