Corrugated Sheet Roofing Corrugations - China

Corrugated sheet roofing material is widely available and easy to use.

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

used.

Sheets should be laid so that the side overlaps are directed away from the

prevailing wind.

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 - 20°C - +70°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 +70°C which may

lead to discoloration or distortion of the sheet.

Company Contact:

• Posted By: Qingdao KRS Perfect Roof Co., Ltd.

• Phone: 008653258725916

• Address: No. 139 Fuzhoubei Road, qingdao , Shandong , China

• Email:

• 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.