How to Retrofit Weatherstripping on Arched Doors
You can use traditional metal V-fold weatherstripping, or the appropriate router jig for modern synthetic weatherstripping. May 12, 2008
I'm looking for advice on retrofitting a Tudor arched door with kerf style weatherstripping. The door is already in place. I'm pretty sure I can set up for the straight cuts with a circular saw and a guide on the wall, but cutting the kerf along the radius of the arch is perplexing me.
(Architectural Woodworking Forum)
From contributor D:
The typical q-lon compressible foam requires the jamb to be rabbeted 5/16" further off the face of the door, then the 1/8 x 3/8" groove goes into the edge of that surface. This is very difficult to do on a curved head door frame unless done while it is being built. The historic solution was/is to use spring bronze, clipped across its width every 2" or so, so the metal forms leaves around the arched part of the door. The straights are done conventionally. This is a very good weatherstrip, but the new folks don't know about it and seem to only trust the spongy plastic stuff.
The q-lon and other types need to be rabbeted and grooved at manufacture. If the spring bronze won't fly, then you can pay $1200 for the special router jig that will put in a kerf at 45 degrees to the rabbet, and use one of several bulb type weather seals. Pemko has spring bronze, the router setup, and the bulbs.
From contributor G:
Pemko sells a trim router attachment that holds the router at a 45 degree angle allowing you to cut the groove you will need. We have done this many times. Page 120 of their catalog, part #640, replacement bits #640C. Seals that work best are S104, S105, S109. The q-lon type they sell is a little loose fitting in the groove and needs to be installed with silicone, making removal difficult.
Would you like to add information to this article?
Interested in writing or submitting an article?
Have a question about this article?
Have you reviewed the related Knowledge Base areas below?
KnowledgeBase: Knowledge Base
KnowledgeBase: Architectural Millwork
KnowledgeBase: Architectural Millwork: Doors and Windows
All rights reserved. No part of this publication may be reproduced in
any manner without permission of the Editor.
Review WOODWEB's Copyright Policy.
The editors, writers, and staff at WOODWEB try to promote safe practices.
What is safe for one woodworker under certain conditions may not be safe
for others in different circumstances. Readers should undertake the use
of materials and methods discussed at WOODWEB after considerate evaluation,
and at their own risk.
335 Bedell Road
Montrose, PA 18801
Copyright © 1996-2016 - WOODWEB ® Inc.