Wall vents

cosmowillie53

Hello folks

Doing some renovation on an old house soon (hopefully).
Sample room: 12'x12'x8'. ground floor.
There is one double glazed window one door and one chimney which will be blocked up and fitted with a vent.
The floors are wooden t&g and vented from underneath (from outside vent in wall).. They will probably be carpeted.

The walls will be covered with 62.5 mm insulated plasterboard.

Q: Do I need to install a 4'' vent near the top of the wall.
If I need one which wall should it be in ...choice is north or east.

Thanks for any info.

dathi

yes you will need vents they can be either in the wall or window your biggest heat loss at the moment is not your walls but rather through your floor . if you think about it all that you have between you and the cold outside air is 20mm of floor board.you should consider insulating this floor. what you do is lift the floor boards and then you have two choices (1) string garden netting between the joists and then fill between the joists with glass fiber /rockwool . or (2) nail a small batten 20*15mm along the bottom of the joists and cut kingspan to fit between the joists pushing it down until it sits on the batten.fill any gaps with expanding foam (you can purchase kingspan in various thickness so purchase the one closest in size to the thickness of floor joist minus batten size) aim to have the kingspan finishing flush with the top of joists . then for either insulation method cover the insulation with a breathable membrane taping all seams and carry it up the wall 150mm .then when you put your insulated slabs on the wall it will cover this joint . finally replace your floor boards and carpets