Exterior opening or masonry opening if you have a brick or stone door surround measure to the outsides of the exterior casing then from the bottom of the sill to the top of the trim.
Fitting a new front door.
Keep out the weather.
If not you will need to compensate for this often by shaving or trimming the door or adding shims.
Fitting a new door may get rid of damp and drafts.
For instance is your floor level.
Also measure the jamb depth.
The new door should be 1 2 inch less than the height of the rough opening and 3 4 inch less in width.
Remove the interior trim and measure the width and height of the frame.
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If so you can align your door with the floor.
The same goes for the depth of the door.
Before removing the old door have the new one on hand.
Compare these measurements to the rough opening requirements of your new door to make sure it will fit.
It s a good idea to measure the actual door too.
Measure both the door and rough opening to make sure the door is the right size.
Insert the new unit top first sliding the exterior molding up below the z flashing.
If you choose to install a front door made of steel you will need a helper.
Benefits of a new front door.
Next create a rough opening around your frame that s at least 1 inch wider and taller than the outside of the door system you re installing then insert the new door into the opening and place shims on the hinge side of the door making sure there s a gap of 1 8th inch between the edge of the door and the jamb.
Measure the old door.
There are a few other factors you ll want to consider before installing a new front door.
Press the unit home so that it beds tightly in the caulk.
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Run a bead of high quality sealant along the exposed framing where the new door s exterior trim will meet the wall and across the floor where the door s threshold will sit.