Mazona 5" Chimney Closure/Register Plate Kit 950mm x 400mm

Product Information

When the plate is inserted, it will hold itself up BUT, use a could masonry nails into mortar joints on both sides to make certain. No need to drive the nails all the way in, in fact just pinning is OK, cause they are easy to remove if needed.

Choco - here is the simple answer. It is almost impossible to correctly seal most insert panels to the fireplace front. A lot of air can get through them - this works both ways.....hurts the draft when stove is being used, and can leak cold air into the home when it is not in use.

If a 904 316 chimney liner is being fitted then a register plate is not required. A plate is still required (to prevent heat being wasted by travelling up into the chimney and also to prevent "old soot smells" into the room as a chimney warms from the heat of the liner) but this plate is called a closure plate which we will come to shortly. It is rare nowadays that chimney liners are not fitted (although stove flue pipes might be connected directly to pot lined chimneys) and register plates are rarely fitted nowadays. When you cut out your hole you can afford to have it a reasonable size. As long as it is smaller than the square and there is material left for the four screw holes to work then all is good.

I have a house built in 1790 with 4 fireplaces. One of those being what I have heard called a "Walk in" fireplace. The opening is basically 4 feet wide and 4 feet tall. So you can imagine the flue is huge as is or was the flue housing. A closure plate is used when a chimney liner, containing flue gases, is present. The closure plate is therefore only required to seal the chimney for cosmetic reasons, to stop soot old soot falling on the stove but also to stop heat disappearing up the chimney and being wasted. If a closure plate developed a fault (e.g.hole) smoke could NOT enter the room as the smoke is contained in a chimney liner.Cut the pipe hole round at first, and cut it at least 1/4” larger than the line – you’ll need the extra room. Cutting this hole can be accomplished in numerous ways: Do NOT use plasterboard of any kind inside the fireplace recess, even the pink fire-resistant stuff, as this is not allowed as plasterboard is not officially non-combustible (plasterboard okay on chimney breast though). Insert plate up around pipe and fasten using masonry nails into mortar joints on side and rear – seal against fireplace with silicone and against pipe (if needed) with furnace cement.