: Cembrit Cemvent Data

: Cembrit Cemvent Data
Cut out the top corner of the 2 slates in the course immediately below where
the vent outlet is required to be positioned in the roof void. (fig 1).The
dimensions of the piece of slate removed should be 190mm x 115mm, as
shown. Re-hole the slates as necessary to ensure they can be fixed correctly
to the slating battens. Cut the underlay as indicated to allow the upper half of
the vent to pass into the roof space. The final position of the cuts in the
underlay may vary slightly depending on thickness of the slating batten and if
counter battens are being used.
Insert the ventilator into the roof void and secure with slating nails into the
batten (fig 2), ensuring that the vent sits closely onto the slates below.
The Vent is designed for use with 25mm slating battens. Where a thicker
batten is used then the back of the batten will need to be reduced to
25mm where it passes across the installed vent. Where the thickness of
the slates on either side of the vent is greater than 8mm, then the same
trimming of the batten may be necessary.
(fig 3) Fix the slates on either side of the vent and then cut and fit a piece of
slate to fit between the top of the grill and the finished line of the slating on the
batten above (approx. 300mm). Cut a piece of the same slate 110mm in length
to fit in the bottom of the vent. Ensure that this piece of slate is dry and free
from dust or loose material. Remove the white paper covering the butyl strips
and stick the slate in place. Ensure that the top edge fits under the front edge
of the grill and the bottom edge is behind the small lugs on the bottom edge.
Now continue slating in the normal manner.
If the degree of exposure of the site, or the location of the vent on the roof, gives cause for concern with regard to
the security of the bottom edge of the vent, it may be further secured either by using a nail point slate hook or a
copper disc rivet inserted through the hole provided. Additionally there is provision to secure the underside of the
vent to the slating batten inside the roof void. This could be desirable if a particularly long or heavy flexible pipe is
attached to the vent, which might cause it to deform.
Any water entering the vent will drain from the space between the bottom edge of the vent and the cut slate
475(l) x 300(w) x 140(d)
To suit 500 x 250mm Slate
665gm + slate
High impact Polystyrene, UV stabilised
10,000mm² free air flow
Dark Grey and Grey/Green
Recommended minimum roof pitch 30 degrees
South West Distribution Centre
7-8 Battle Rd,
Heathfield Industrial Estate,
Bovey Tracey, Devon
TQ12 6RY
Telephone 01626 835722 Fax 01626 835723
CemVent is probably one of the most versatile Natural Slate Ventilators available on the market today. CemVent
will match perfectly with any slate simply by using a piece of the same slate, cut on site and fitted into the bottom
section. No unsightly plastic ‘mushrooms’ to spoil the roof, just a discreet grill, coloured to blend into the finished
roof. CemVent can be used for the termination of soil vents or extractor fans (with optional flexi pipe) or to simply
ventilate the roof void. Developed by one of Europe's foremost producers of roof ventilation products, CemVent
is manufactured from UV stabilised material, using design technology developed proven and tested during more
than 30 years of experience in this specialised field.
A perfect match every time
Simple to install
Economically priced
Choice of grill colours
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