This document contains general recommended instructions for combining our windows and doors.
The following two terms are used in the context of combining doors and windows:
- Mullion – used for the consecutive connection of two products with a vertical member.
- Transom – placement of a product (usually a window) above another product (typically a door).
For each product there is additional detailed information on connection using mullions or transoms.
When combining two products it is preferable if they have the same frame depth, especially when connecting with mullions.
In order to combine products:
- An I-shaped structural member or profile (I-mullion) is used for the vertical joining of the products.
- A transom sill pan, or a combination of a transom sill pan and a structural tube, is used for the horizontal joining of products using a transom.
NOTE: In nail-fin type frames, it may be necessary to cut the fin on the spot at the location of the mullion or transom.