b hop

03:28PM | 12/16/04
Member Since: 01/26/04
6 lifetime posts
I am installing new exterior french doors on a slab. Is there any need install wood under the threshold or can the sit directly on the slab. I framed the r/o assuming they would sit on the slab but someone told me they should sit on a p/t 2x4.


07:39PM | 12/16/04
Member Since: 11/27/04
174 lifetime posts
use roofing felt. the goal is to stop moisture from the slab from contacting the wood leading to rot.

and use caulking under there too ,to stop air drafts.

b hop

11:44AM | 12/18/04
Member Since: 01/26/04
6 lifetime posts
The question is.....Is there any need install wood under the threshold or can the sit directly on the slab? The threshold is not wood and the slab is the interior floor .


05:20PM | 12/20/04
Member Since: 11/27/04
174 lifetime posts
the door can sit on the slab.

i take it you have an aluminimun threshold.

just put caulking under to prevent drafts.



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