Insulation Calculator

Ceiling/Underfloor – how much insulation do I need?

If you’re unsure as to how much underfloor or ceiling insulation you need for your project, the traditional home insulation calculator method will help you to work it out.

What you need:

  • Tape measure
  • Pen & paper
  • Calculator

Calculating the size of your house

  1. Measure the outside walls of the house.
  2. Sketch and mark the measurements on the paper as you go.
  3. Measure all the entrance ways and areas not to be insulated.
  4. Once completed, divide the different sections into blocks use a calculator to multiply the different lengths of each of the boxes to find the square meter size of all the boxes.
  5. Add all the boxes together. This is the size of your house.
  6. Measure the distance between the joists as to know which width of insulation to order

Calculating the cost of ceiling insulation

  1. Divide the size of your house by the square meters one bag of insulation will cover. This tells you how many bags you will need.
  2. Multiply the number of bags by the price per bag. This is the cost of your ceiling insulation material. Delivery charges may apply.

Tips

  • For insulating between the joists you will need approximately 90% of the house area.
  • For foil type insulation you will need approximately 110% of the house size to allow for overlaps.
  • For insulation blankets that will cover the joists you will need 100% of the house size

Buy Insulation Online!

 

Insulation calculator for walls – how much insulation do I need?

What you need:

  • Tape measure
  • Pen & paper
  • Calculator

Calculating the size of your house

  1. Measure the outside walls of the house.
  2. Sketch and mark the measurements on the paper as you go.
  3. Measure the height between the floor and ceiling.
  4. Once completed, add the wall lengths up and multiply this by the height.
  5. Measure the windows and doors from inside and make a list of the areas.
  6. Subtract the total of the windows and doors from the total wall area. This is your to be insulated wall area.
  7. Measure the distance between the studs as to know which width of insulation to order.

Calculating the cost of wall insulation

  1. Divide the wall area to be insulated by the square meters one bag of insulation will cover. This tells you how many bags you will need.
  2. Multiply the number of bags by the price per bag. This is the cost of your wall insulation material. Delivery charges may apply.

Tips

  • For insulating between the studs you will need approximately 90% of the wall area to be insulated.
  • For foil type insulation you will need approximately 110% of the wall area to be insulated.

Quality insulation at discounted prices

Visit our Price Wise NZ insulation webshop to purchase insulation segments for underfloor, ceiling and walls at discounted prices.

Buy Insulation Online!

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