A Guide to constructing a base for your conservatory
Excavate the conservatory
foundation down to solid ground a minimum depth of 900mm (2'-6")
and cast the concrete foundation a minimum depth of 200mm
(8"). This is the minimum depth of concrete.
Once the concrete has set, normally overnight, build the brickwork
up to the height of the existing house foundation. The next
stage is to backfill any earth to fill all the voids and to
hardcore the entire floor area to a minimum depth of 150mm
(6") and compact using a vibating plate compactor, sand
blinding about 25mm (1") is added to prevent the visqueen
sheeting vapour barrier from being damaged, this is also compacted
using a vibrating plate.
Lay 1200 gauge visqueen sheeting to the total floor area and
over lap to cover your new brickwork to prevent any staining
by the concrete.
The concrete floor is poured using premixed concrete, this
can be mixed on site by a barrowmix service and you only pay
for the amount of concrete you use.
Leave the floor a couple of days to set and then you are ready
to build the dwarf wall for your new conservatory.
For speed of construction you can mass pour the foundation
to 4 - 5 course’s of brickwork below the existing house
foundation, the additional cost of concrete will be outweighed
by the saving of materials and labour to build up to the same
height.
For a detailed step by step guide on how to build a conservatory
base Click Here
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