Corrugated Sheet Roofing Corrugations - Chinaprice: contact company for price
Corrugations should run in a straight line between the highest and lowest
points, and at a right angle to the purlins ( the intermediate supports) .
The overlaps ( ends and sides) depends upon the sloop of the roof.
Purlin spacing should suit the end laps required for the size of sheet to be
Sheets should be laid so that the side overlaps are directed away from the
All purlins should be in one plane and parallel to each other. They should be
properly anchored to the supporting superstructure.
Ends of all sheets should be supported by purlins. The free overhang at the
eaves should not exceed 300 mm.
8 mm diameter ( min) hook bolts, crank bolts or coach screws, should be
inserted through 10 mm diameter drilled holes. - NEVER PUNCHED - in the crown
of the corrugations.
Nuts or screws should be tightened lightly at first, and then tightened again
when a dozen or more sheets have been laid. At intermediate purlins, they
should not be tightened in an attempt to make the sheet rest on the purlins.
A cat- ladder or roof board should always be used when working on a roof for
safety of the person and to avoid damage to the roofing material.
Installation of corrugated roof sheeting
These notes are intended to cover the use and installation of corrugated roof
sheets such as PVC, other plastics and bitumen fibre sheets. Although very
different as materials and where they are used, they do have similar
properties regarding flexibility and weight. One advantage of these corrugated
materials is that it is far more rigid than a flat sheet of a similar type and
thickness. This enables considerable savings in both weight and cost, it also
makes the sheet relatively easy to handle. Generally all these types of
material can be used either as roofing or vertical cladding.
Most of these sheeting tends to be susceptible to condensation when used as
cladding for outhouses etc. - being relatively thin they tend to have low
thermal insulation properties. Condensation will be reduced if the interior of
the structure is well ventilated.
Being thin sheeting, most types will act as a ' drum skin' when it rains. The
sheets can also become heated by direct sunlight and this heating can be
radiated into the building making it very uncomfortable in hot weather. A
false ceiling suspended under the roof can reduce both of these problems, the
void between the roofing and ceiling must be adequately ventilated to avoid
excessive temperatures ( especially important where plastic roof sheeting is
used) and to minimise condensation. Choosing light colour sheets ( or, where
the material allows this, painting them white/ silver) will reduce the
internal heating effect.
PVC has a service temperature range of - 20Â°C - +70Â°C. Care must be taken to
ensure that it is not used in situations where the maximum service temperature
could be exceeded. As such it is not recommended for use in situations where a
false ceiling is to be erected below the rooflight, as this will cause heat
build up in the sheet, exceeding the maximum temperature of +70Â°C which may
lead to discoloration or distortion of the sheet.
- Posted By: Qingdao KRS Perfect Roof Co., Ltd.
- Phone: 008653258725916
- Address: No. 160 Jinsongsan Road, qingdao, China
- Website: http://www.chinaperfectroof.com/en
Published date: April 20, 2016 -
- Business Description: Roofing Materials: corrugated bitumen roofing sheet, corrugated bitumen
waterproof sheet, stone coated metal roof tile, resin roofing tile, UPVC
roof sheet, FRP transparent roof sheet, asphalt shingle, fiber cement
corrugated roof sheet, Roof panel, Roof slate and shake, natural slate,
steel corrugated sheet, PC sun sheet, all kinds of nails and screws.
Heat insulation System: metal EPS sandwich roof panel and wall panel, metal Rock wool sandwich roof panel and wall panel, PUR Roof sandwich panel and wall panel, metal PIR sandwich decorative insulation wall panel.
Wall Cladding Materials: vinyl siding, fiber cement board, fiber cement panel, fiber cement decorative panel, PP decorative siding panel, wooden-like fiber cement sheet.
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