Calculating the Number of 12 ft Iron Sheets Needed to Roof a Gable House

To determine how many 12 ft iron sheets are needed to roof a gable house with dimensions of 15 m x 7 m, we need to calculate the area of the roof and figure out how many sheets are required to cover that area. This guide will walk you through the process step by step.

Step 1: Calculate the Area of the Roof

Assuming the house has a simple gable roof, the roof will have two sloping sides. The width of the house is 7 m and the length is 15 m.

The area of one side of the gable roof can be calculated using the formula: Area Length x Width. For simplicity, let’s calculate the total roof area by considering only the horizontal coverage.

Total roof area Length x Width 15 m x 7 m 105 m2

Step 2: Convert the Area to Square Feet

Since iron sheets are often measured in square feet, we need to convert the area from square meters to square feet. 1 square meter is approximately 10.764 square feet.

105 , text{m}^2 times 10.764 , text{ft}^2/text{m}^2 approx 1133.22 , text{ft}^2

Step 3: Calculate the Area Covered by One Iron Sheet

Each iron sheet is 12 ft in length. Assuming a standard width of 3 ft, the area covered by one sheet can be calculated as:

Area of one sheet Length times Width 12 , text{ft} times 3 , text{ft} 36 , text{ft}^2

Step 4: Calculate the Number of Sheets Required

To find the number of sheets needed, divide the total roof area by the area of one sheet.

text{Number of sheets} frac{1133.22 , text{ft}^2}{36 , text{ft}^2} approx 31.41

Since you can’t have a fraction of a sheet, you would round up:

Total number of sheets needed 32 sheets

Adjusting for Practical Considerations

Considering practical handling and working with 12 ft sheets might be challenging. You can request custom-cut sheets. Let’s assume the dimensions for more manageable sheets are 8 ft x 4 ft, which is approximately 2.438 m x 1.219 m.

text{Area per sheet} 8 , text{ft} times 4 , text{ft} 32 , text{ft}^2 approx 2.970 , text{m}^2

Dividing the total roof area by the area of one custom sheet:

frac{105 , text{m}^2}{2.970 , text{m}^2} approx 35.30 , text{sheets}

Rounding up for practical purposes results in 36 sheets. Adding 5 sheets as waste for any cuts, the total needed would be 41 sheets.

There are various variables to consider, such as the pitch of the roof and trusses at 600 mm centres. If you can get the sheets and they are easy to handle for a 105 m2 roof, you would need 38 sheets.

Conclusion

You will need approximately 32 sheets of 12 ft iron sheets to roof the gable house, provided you can handle the sheets properly. Adjustments may be necessary based on the actual pitch of the roof and any overlaps or waste.

For more information on custom iron sheets and roofing projects, visit our roofing resources page.