MICON THATCHSAYF
MICON THATCHSAYF is
an environmentally safe and effective fire retardant coating for the fire
protection of thatch roofs. On exposure to heat, the fire retardant forms a
protective char that restricts oxygen flow to the surface and reduces the
surface temperature of the coated base.
Micon Thatchsayf is a water-based solution of
fire-retardant and intumescent chemicals in a polymer emulsion binder formulated
for the protection of thatch roofing. This combination provides dual protection
with the fire retardant chemicals penetrating the leaves of the thatch and the
intumescent, as well as some of the fire retardant chemicals, forming a thin
protective film on the surface of the thatch stems.
The main constituents of Thatchsayf consist of
fertiliser type chemicals, i.e. phosphates and nitrogen compounds, and as such
are environmentally friendly, however, high concentrations, such as may be
reached in the run-off water after the first rain, may cause damage to
vegetation in the drip-off area depending on the amount of rain and thus the
dilution.
Extra information on Thatchsayf
tested in
accordance with CSIR, DIN and UL (modified) requirements
environmentally
acceptable
improves thatch
compaction
allows the thatch
to breathe to prevent rotting
retards bacterial
and fungal growth
does not alter
the natural appearance of thatch
Wording of typical Specification
“Apply Thatchsayf by high pressure spray to both sides of the roof in accordance
with manufacturer’s instructions.
Description
MICON THATCHSAYF is a water-based solution of fire-retardant and intumescent
chemicals in a polymer emulsion binder formulated for the protection of thatch
roofing. This combination provides dual protection with the fire retardant
chemicals penetrating the leaves of the thatch and the intumescent, as well as
some of the fire retardant chemicals, forming a thin protective film on the
surface of the thatch stems.
Aesthetics, Fungal growth, Leaching and
Environmental aspects.
MICON THATCHSAYF does not change the natural appearance of the thatch and
improves compaction without hindering its ability to breathe. Thatchsayf also
retards bacterial and fungal growth. In order to minimise water penetration it
is crucial that roof slopes are 45
degrees. The main constituents of Thatchsayf consist of fertiliser type
chemicals, i.e. phosphates and nitrogen compounds, and as such are
environmentally friendly, however, high concentrations, such as may be reached
in the run-off water after the first rain, may cause damage to vegetation in the
drip-off area depending on the amount of rain and thus the dilution.
MICON THATCHSAYF TECHNICAL INFORMATION
Good thatching practice
It is crucial that the thatch roof construction complies with good thatching
practice, as fire performance is also dependant on the construction of the
thatch. This ensures that when the roof is sprayed with Thatchsayf it will
maintain its integrity in resisting the ravages of fire for sufficient time to
allow fire-fighting services to arrive.
Quality control
Quality control procedures are of a high standard and all batch numbers of
material are recorded for each contract and copies of certificates are kept by
both Micon and the CSIR for each completed job.
Application
Spraying of Thatchsayf is undertaken by MICON approved and trained applicators.
Strict control of the applicators ensures that the correct pressure and minimum
quantity of 1.3 litres per square metre are applied to the thatch. Thatchsayf is
easily applied by means of high pressure spraying equipment to both the outside
and inside surfaces. This ensures that at least 5 mm penetration is achieved to
the underside of the thatch (where compaction is much denser), and up to 75 mm
penetration to the outside of the thatch. It is important that the thatch roof
is not disturbed after spraying and in this event re-application of the affected
area is necessary to ensure complete protection. Spot checks on completed roofs
are made by the CSIR.
Certification
As the application of Thatchsayf is to provide vital protection in the event of
a fire, MICON offers a Certificate for each contract. The homeowner, Architect,
Developer or Building Control Officer can request this document, which certifies
supply of product to site. The
applicator also signs that the product has been correctly applied in accordance
with the manufacturers instructions.
Action in Fire
On exposure to heat the first stage of protection occurs when the intumescent
material foams and forms an insulating char on the surface limiting the heat
flow and the supply of oxygen, which supports combustion. The second stage of
protection occurs when the fire retardant chemicals react with the cellulose and
charring takes place, again having the effect of limiting the flow of oxygen.
Fire Tests
Fire Properties
Test Method
Resistance to ignition
DIN, UL (modified)
Weathering
CSIR, UL (modified)
Rot resistance
CSIR
Tested by the CSIR report number BF010/020
September 1993.
Physical Properties
| Viscosity |
: |
16 seconds F.C.4 |
| Specific gravity |
: |
1.16 |
| Drying time |
: |
2 – 5 hours |
| Full cure |
: |
4 days |
| Solid content |
: |
47 – 49% / vol |
| Spread rate |
: |
1.3 l/m2 |
| Shelf life |
: |
12 months |
