All of our external door frames are fully assembled using mortice and tenon joints that are both glued and screwed together and can be supplied with or without bottom sills as required.
Our boarded doors typically have a layer of 20mm thick boards on both sides and have 18mm insulation in the middle. Out standard door frame specification is 75mm x 90mm and is rebated to take a door or 60mm thickness.
We also make door frames for individual requirements. Please see our 'contact us' page on how to get in touch. Glazed exterior doors are constructed to accept 24mm double glazed units.