Composition
and Manufacture
Eavemaster cellular PVC-UE fascia board is of a co-extruded foamed
material having a rigid closed-cell core with an integral smooth
and durable PVCu skin. Eavemaster soffit is an extruded twin-walled
tongued and grooved board manufactured from high grade PVCu material. They
are resistant to most acids, alkalis, sea-water insects and atmospheric
pollution. They do not contain CFC's and none of the materials
used in its manufacture are considered harmful to the environment
and if replaced can be recycled.
Density
Eavemaster cellular PVC-UE fascia board has an average
density of 550kg/m3. Eavemaster PVCu soffit
board has an average density of 1460kg/m3.
Strength
Eavemaster profiles are sufficiently rigid to facilitate
storage and erection, while having sufficient flexibility
to withstand normal handling on site. The system
has adequate resistance to hard and soft body impacts
likely to occur in practice. Eavemaster fascia
boards are tested to ensure compliance with the BS specification
for falling weight impact resistance as specified in
BS7619:1993 (Annex E).
Durability
All materials used in the manufacture of the Eavemaster range
have been selected to ensure that the durability of the
finished product is optimised.
Accelerated weathering tests indicate that Eavemaster products
will perform satisfactorily in use and will not exhibit premature
fading or discolouration . Eavemaster profiles satisfy
UV stability requirements as detailed in BS7619:1993, 8.1 for
cellular foamed products
Thermal Movement
Linear thermal expansion is less than 7 x 10-5 per
Degree Celsius which is similar to that of rigid PVC-U
and hence precautions need to be tken to provide for possible
thermal movement. These products should not be installed
where ambient temperatures are likely to exceed 50 Degrees
Celsius.
Thermal Conductivity
The cellular core ensures levels of insulation superior
to wood, concrete, brick and plaster board. The thermal
conductivity is typically 0.10W/MK (Din52612).
Chemical Resistance
All products in the Eavemaster building product range are not affected by liquids
in common use and are resistant to most acids and alkalis, but are liable to
attack by aromatic solvents, ketones and esters. Contact with bituminous
products should be avoided.
Water Resistance
The impermeable skin of Eavemaster fascia is unaffected by moisture and does
not rot or corrode. Cut ends are non-absorbent due to the closed cell
structure of the material. When tested in accordance with the requirements
of Method 430a of BS2782: Part 4,
weight increase due to water absorption is not
greater than 1%.
Biological
Eavemaster products will not support bacterial or fungal growth. They
are resistant to attack by woodworm or termites but should be protected against
vermin during storage.
Fire Resistance
Eavemaster products do not support combustion. Cellular PVC products
when tested in accordance with BS476 part 7:1987. Surface spread of flame
achieve a class 1 rating. The spread of flame along its surface is limited. Cellular
PVC-UE material has a softening point within 75 to 80 degree centigrade range.
Workability
Cellular PVC can be worked using conventional carpentry
tools for cutting, drilling and shaping. Nails, screws
and specified adhesives are used for fixing.
Maintenance
The products require limited maintenance which is confined to periodic washing
for the sake of cosmetic appearance. This may be carried out if required,
using a clean cloth and a solution of detergent diluted to the normal concentration. Where
possible flood the PVC-UE product taking care not to abrade the surface while
removing dirt. Particularly stubborn marks should be removed using a
mild household non-scouring cream followed by washing. |
