I am putting in new hardwood flooring and the level of my floor was raised a good 1.5". As a result I had to cut all my door and jambs, which was fine for the interior doors. I naively took the saw to my porch and front door and saw sparks fly. I assume there is some metal in there or something. How can I take off like an inch off the bottom of these reinforced doors?

Thanks in advance.

2 Answers 2


Take your door off and get a good look at the bottom. There's a fair chance it's an aluminum or steel skin on a wood core. If so, you'll want to get a blade (I'm assuming circular saw is your weapon of choice, here) that's rated for whatever you've got. In addition, you'll want a U-shaped door sweep (well, 3 sides of a box, really) to cover up any nasty metal edges.

Best practice would be to splash a bit of primer on the raw wood you've exposed.

Depending on the configuration of your door, a new threshold might be a good thing.

At a minimum, wear eye and ear protection... a nuisance dust mask is also a good idea.


What I have done in the past:

Cut door with saw and blade made for metal cutting. On a door I was working on, the amount removed (1 1/2") compromised the wood framework/block at the bottom of the door on the inside, beneath the "skin", which was tin. I then carefully cut a new wood block, chiseled out the foam insulating core to the proper depth, and installed it into the bottom of the door with glue and finish nails.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.