Frequently Asked Questions

Frequently Asked Questions

If your question does not appear in the list below please feel free to contact us to discuss your project requirements.

  1. Q: How much cooler will my house be when I insulate?  Insulation doesn’t actually make you cooler or warmer. What insulation does is allow you to maintain a more even temperature more easily. In summer a well insulated home will stay close to the overnight temperature( say low 20’s ) whilst outside the temperature will rise to over 30 degrees or more, hence the saying up to 10 degrees cooler. In Winter the reverse happens, we are comfortable with heaters on and a temperature of say 18 – 20 degrees but in an un-insulated home the temperature will drop rapidly when the heaters are turned off. On a cold morning you will be within a degree or two of outside temperatures, say 7 0r 8 degrees whereas a well insulated home with good window coverings will stay within a few degrees of the comfortable 18 – 20 degrees. Again the saying 10 degrees warmer.
  2. Q: What is the best insulation for my house?  This is a hard one. What is important is the old adage about what is heavier,  ‘a pound of feathers or a pound of lead.’ The truth is obviously that they are the same. The same holds for insulation be it Glasswool, Rockwool, Polyester or Sheepswool. The thermal rating (R Value) is the measure. Differences between the products are discussed elsewhere and the particular R Value that is needed is now nominated in the energy assessment for new homes and likely to be either R2.5 or R3.0 as recommended in the Building Code.
  3. Q:What’s the thickest and best Insulation I can get? Be careful here! It is important to match the R Value of your insulation to the job in hand. Bigger isn’t always best!!! For most of East Coast New South Wales, we experience cool sea breezes in the afternoons and evenings throughout summer. Too much insulation can backfire as the insulation having been exposed to oven like temperatures throughout the day tends to ‘hold the heat’ as the outside twilight cools down. This is one of the issues that “whirly birds’ are dealing with as it’s important to have the insulation cool down to be ready to start again next morning. Another consideration is the amount of space available. For example if you had a 90mm wall stud, it would be pointless attempting to compress a 140mm insulation batt down to 90mm as the effectiveness is downgraded – apart from making it difficult for the plasterer to fix his sheet.
  4. Q: What insulation can I use to ‘sound-proof’ where my teenagers practice their band? It’s not quite as easy as that unless you send them away to boarding school. When we are dealing with acoustics it is important to contain the sound at the source. A concrete ‘bomb shelter’ would be good but impractical. The various plaster board manufacturers have developed numerous wall and ceiling systems that offer high performance sound attenuation, incorporating specific wall construction, varying density sheeting with particular insulation in-fills. I can explain a lot more detail about this if you want to contact us.
  5. Q: What can I do about condensation building up around windows and walls in bedrooms? Will ‘whirlybirds’ fix the problem? This problem always pops up with winter bringing lower temperatures. Condensation occurs when warm, humid air meets a cold surface and can have many factors contributing to the cause. Events such as a large crowd of people indoors for a party on a cold winter evening will likely see increased amounts of condensation on the windows. Gas heaters and stoves with no external flu seem to be a big contributor. Exhaust fans and range hoods should be ducted to the outside air to expel the steamy air from showers, stoves or clothes dryers. We have found that by ensuring you have a good coverage of ceiling insulation, that the inside temperature of a dwelling is more evenly distributed. This allows you to run the the heating at a much lower level and in most cases eliminates the big condensation problem. Roof ventilators and increased air-flow will help the situation of condensation in an attic but not do that much to the living area below unless a series of ceiling vents are also installed.