Double Stud Wood Frame with Siding

Flanged & Centered Window

R-45 Wall

Disclaimer: The drawings and information displayed on this page are for informational purposes only. These construction details can never be used as construction drawings or in any other form to provide instructions on how to construct a building. Construction drawings always need to be verified by qualified architects or construction professionals. Acelab assumes no responsibility for any construction drawing or instruction based on or derived from the drawings displayed on this page.

Head

(Detail 1/3)
Head Image

Sill

(Detail 2/3)
Sill Image

Jamb

(Detail 3/3)
Jamb Image

Notes

This window detail uses a two stage seal to insure no water or air can infiltrate into the building. The exterior seal is installed by applying WRB tape into the rough opening and over the head window flange. No tape should be applied over the sill window flange to allow the window to drain.

The interior seal is added by installing a backer rod & sealant joint. Expanding foam or special tapes can be used instead of sealant, however a backer rod should still be installed to prevent the foam from completely filling up the cavity and preventing the system to drain.

* Whether or not you need a Class II or III Vapor Barrier depends on your climate zone and location. Refer to Wall Barriers Notes section below for more info.

Building Science Courses on Acelab

How windows manage water Image

How windows manage water

Adapt this detail & find the right products

Learn how you can adapt this detail based on your climate zone & desired aesthetic

Wall Barriers

Understand how climate affects wall specifications, learn whether you should use a vapor retarder, & discover suitable products.

Climate Zone

- or -

Design Requirements

Notes

Product Options

Browse curated materials for this construction detail.