fire doors

[gary29]

Good morning i need to coat my pine fire doors. they are plain wood as with most living things they expand and contract so some times stick they have been up for over a year and they were a quality purchase from howdens. what do you recomend have looked at the dimond tough sealears but they are quite expensive and i have 8 doors to attend to and how best to apply

Thank you for your help

[Joiner_Mike]

All doors will expand and extract when no paint/varnsh finish is on. The paint/varnish prevents the wood from drawing in moisture from the air which in turn makes the door expand. Shave the door so it opens with ease and has a gap big enough for a couple of coats of varnish/paint and able to still open/close. Make sure you also varnish/paint the bottom and the top of the door.
Mike