The Celcon Thin-Joint System A Definitive Guide - Masonry First

3 Thin-Joint
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Installation
a step by step guide
Building with the Celcon Thin-Joint System is a fast and
simple process. The greatest benefits are achieved where
the blockwork inner leaf is constructed first, creating a
weather tight environment for follow on trades to work in.
With the brickwork taken off the critical path, it can be
constructed within the remaining build programme, using
several types of widely available wall ties produced for use
with Thin-Joint Systems, see page 16.
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1 To gain the maximum benefit from the
Celcon Thin-Joint System, it is necessary to
adapt the schedule of materials and services supplied to
the site, e.g. the blockwork should reach first floor level
in 1-2 days, therefore scaffolding needs to be in place
before starting the build. Lintels and floor joists will need
to be on site during this period.
The first course of blocks should be bedded normally using
a conventional designation (iii) mortar. Conventional mortar
is required to accommodate any irregularities in the
supporting structure. This base course can use Celfix Mortar
if the System has been used in the foundations or the slab
is sufficiently flat.
It is essential that the blocks are laid accurately, true to level
(±1mm) and vertical (many builders use a simple laser level for
speed and accuracy). The perpend joints on the first course can
be of Celfix Mortar giving a more rigid base in a shorter time.
Should any irregularities or imperfections occur on the bed
course, surfaces should be sanded down using a proprietary
sanding board. Jointing faces should be clean and free from
dust, if necessary, cleaned using a stiff brush.
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