Our Products
Our products
Available Products

  • Galvanised Iron Roofing Sheets and Coils- Plain And Embossed Finish.
  • Pre-Painted Galvanised Iron Roofing Sheets and Coils- Plain And Embossed Finish.
  • Pre-Painted Aluminium Sheets and Coils – Embossed Finish

Sheets are available in the following standard colours:
- HB Green
- HM Blue
- TC Red
- Ivory Yellow
- Ivory White
- Nut Brown
- Greybeige
- Traffic Black

They are also available in the following profiles:
- Corrugated
- Trimdek
- Metral
- Steptiles

Colour Guide
Here is colour Guide

HB Green  HB Green
HB Blue  HM Blue
TC Red  TC Red
Ivory Yellow  Ivory Yellow
Ivory White  Ivory White
Nut Brown  Nut Brown
Greybeige  Greybeige
Traffic Black  Traffic Black

Profile Guide
Here is profile Guide

Corrugated roofing sheet  Corrugated
Trimdek aluminium roofing sheet  Trimdek
Metral Aluminium roofing sheet  Metral
Steptile roofing sheet  Steptile

Surface Finish
Here is surface Finish

Diamond Embossed sheet  Diamond Embossed
Stucco Embossed sheet  Stucco Embossed
Plain sheet  Plain

Product Specification
Here is product Specification

Corrugated Normal Span  Normal Span
Corrugated Wide Span  Wide Span


Trimdek Normal Span  Normal Span
Trimdek Normal Span

Metral (available in Industrial 5/6)


5 6
EFFECTIVE COVERAGE  750mm(Using Single Lap) 900mm
PITCH OF PROFILE 150mm 150mm
FULL WIDTH 800mm 1000mm


Stepile configuration steps

EFFECTIVE COVERAGE  750mm(Using Single Lap) 925mm
PITCH OF PROFILE 185mm 185mm
FULL WIDTH 900mm 1000mm
FULL LENGTH 2500mm 2500mm

Products Installation Guide, Care and Maintenance

  • Site Actvities

  • -Handling and Storage
    MIDGAL maintains an advanced manufacturing process with the best of material under strict quality control that ensures product and installation standards are maintained. At MIDGAL our attention to quality, details and precision is extra ordinary and unrivalled.

    However, care must be exercised when offloading our products from the delivery truck mechanically or manually.

    When individual sheets are being handled damage of corners must be avoided; otherwise satisfactory laying of sheets during installation will prove difficult. Sharp and heavy objects should not drop on the sheets. Careless handling of the sheets will impair the appearance of a finished job.

    Before the arrival of roofing sheets to the site a suitable storage area should be prepared. Such storage area must have an environment that is be dry, non-acidic and properly ventilated in order to prevent condensation of acidic moistures in between sheets which could give rise to corrosion and stain marks.

    Roofing sheets should be stacked-stored on dry timber battens either horizontally (for indoor storage) or inclined (for outdoor storage)


    The inclination helps drain off rain water. The upper end of the inclined sheets should be wrapped in a water proof sheet.

  • Installation

  • Safety should be the first consideration during process of installation of roof on a building. The Site Supervisor must be careful in deploying capable hands and assigning them to appropriate duties.

    Following minimum safety measures are recommended.
    1. Personnel should wear gloves when handling the sheets.
    2. Sheets must not lie loose on the ground or on the roof, and walking on sheets should be prohibited – separate access to installation area should be provided.

    For satisfactory and speedy installation at site, following installation practices should be adhered to:
    1. GENERAL The rate at which water is shed from a roof varies mainly according to the pitch of the roof and the shape of the sheets. Pitch is, however, the more critical factor for determining water shedding rate. Under Nigerian conditions, pitches lower than 5° should be avoided at the time of design of the roof.
    For leak-proof construction, whatever the pitch of the roof, purlins should be straight and level. Sags and high points between and at the trusses will jeopardize the efficiency of the side lap. Owing of the purlins or faulty lining-up from truss will affect end lap fixing

    2. PURLINS Punch all nails likely to be in contact with the roofing sheet well below the surface of the wooden purlin. To prevent splitting, purlin should be of timber of not less than 4” wide.

    3. PLASTER WORKS Ensure that all plastering or cement work above the roof is completed ore sheeting commences.

    4. CUTTING AND DRILLING Care should be taken in cutting and drilling to avoid distortion of the shape of the sheet.

    5. LAYING SEQUENCE The direction of laying will depend on the direction of wind because rain and dust can easily enter the joints if the roof is covered the wrong way.

    Sheets should always be laid in the opposite direction to the wind. Laying of sheets should start from the eaves and move towards the ridge. The sheets are aligned at the eaves to ensure straightness by means of a line (rope). This enables the ridges to fit easily.

    Narrower Course

  • Maintenance

  • Besides roof designs and the environment, maintenance also plays an important role on the life of a roof. Maintenance includes the following:

    1. Washing should be done, preferably, at least every six months and more frequently in coastal areas where moisture in atmosphere contains high level of salt. Washing of roof is also recommended in areas of high industrialization, which have higher content of oxides of sulphur, nitrogen and chlorides salts along with humidity in the air.

    2. Removal of foreign particles such as leaves and debris from gutters and flashings.

    3. Regular inspection of roofs and walls for problems before they become major corrosion sites.

    (Contact with incompatible material: To enhance life of galvanized steel sheets, it is important to note its compatibility with other commonly used material in construction. Contact with some non-compatible material and even water or moisture flowing from such material can adversely affect the life of the sheets.)

  • Limestone (commonly used in colouring cement walls)
  • Pesticides
  • Wet and dry concrete
  • Soils
  • Lead
  • Copper
  • Uncoated steel
  • Carbon (in pencils and some rubbers)
  • Chemically treated wood or plywood
  • Materials having excessive moisture content (Non-seasoned timber, bitumen sheetsand washers)