Adam has done fantastic job installing our 3 exterior doors. The job was one of the more complicated ones that we have done. Doors need to be airtight, hang true and plumb, and also be properly flashed to protect them from water.
Our exterior door extension jambs put the door flush with the inside of the house so the door can open all the way in. This is the opposite of our window extension jambs, where the windows sit flush with the outside. A quirky way of differentiating this concept is doors are “innie” and windows are “outtie”.
The extension jambs were attached to the aluminum clad door with Kreg screws and water proof glue. There is a second set of screws attaching a strip of wood near the outter edge because the piece of cypress that we used wasn’t wide.
In addition to extending the jambs of the door we also needed to extend the threshold. We did this using some of our granite counter top scrap. It is amazing what you can cut with a diamond blade on a circular saw. This is easily one of the loudest jobs we have done.
The stone dust is quite toxic, so we eventually worked out a way to capture most of it with Adam’s Festool shop vac.
The shop vac sucked the dust right up
We needed another large piece of granite for our third stone threshold so we made our second trip to the granite counter top manufacturer to get more scrap.
We used flex wrap tape for the stone threshold sill pan (the white area). Behind it is 1.5″ rigid foam insulation that the door will sit on. The foam will eliminate the thermal thermal break under the door. The copper flashing tape provides an impervious surface protecting the parged 2″ of foam that is on the exterior of the foundation.
We used copper for the door sill pan. The stone thresholds look really sharp.
Another detail to protect the doors from water. The saw kerf on the underside of the stone threshold is called a drip edge. Water clings to surfaces and can move horizontally along them, however it can’t move vertically (unless you consider capillary action).
Ordinarily doors and windows have flanges on them that seal them to the sheathing. Since we made our own extension jambs we also needed to make our own flange using a technique called back flashing. One uses two pieces of flashing taped together with about 1″ of overlap. The tape, which now resembles double sided tape, can now stick to both the jamb and the sheathing.
Hannah (with dinner) admiring our southern glass door. I had to put blue tape over the handle and lock set holes because bees immediately started to nest in them.
Installing a door lock
Our completed porch door entrance. This is the one that will see most of the foot traffic.
I suspect our Vernon St. door way is going to be in a home magazine some day.
Interior of Vernon St. door.