Flat Roof Insulation Board Thickness

Insulation in a warm roof.

Flat roof insulation board thickness.

The importance of insulation thickness r value isn t just a time measurement though. The average cost of flat roof insulation is 0 67 per square foot for 1 inch thick polyiso with 6 r value. They keep your home at a comfortable temperature without the need to crank your heat. Rigid roof insulation board.

To achieve this add 100 to 160mm of insulation above the structural deck dependant upon insulant conductivity. The target should be to achieve a u value of 0 25w m2k or better. Our range of high and optimum performance flat roof insulation products are suitable for use in a range of flat roofs. It should be of the maximum available thickness.

Rigid foam insulation also known as insulating boards provide high r values. Rigid insulation is one of the best tools to reduce your energy costs. For a 1 inch board equivalent of 6 r value. The insulation material for a warm flat roof should.

You can expect to pay about 55 100 sq ft. It takes into account the size of the sample and the overall change of temperature over time so that you can compare thermal conductivity of materials tested with plates of different temperatures or even that were tested by other methods. We recommend having at least 20 r value worth of material for optimal energy efficiency. The typical u value of an existing uninsulated flat roof is 1 5w m2k.

It is top quality and the most cost effective product for your flat roof. While expensive the best insulation is polyiso rigid foam. With solutions ranging from our optim r vacuum insulation panels to our therma range of pir insulation we can provide the best solution for flat roof insulation for roofs with mechanically fixed bonded or torch applied waterproofing systems. Achieving a u value of 0 20w m meaning your roof will be better insulated than your walls will need 120mm thickness of rigid foam or 200mm of mineral wool or natural insulation.

When installing a flat roof it is important to ensure you have suitable flat roof insulation to minimise any heat loss and improve noise insulation and is an essential part of the roof structure without appropriate flat roof insulation the extension or building will not pass building regulations. Composed of a closed cell polyisocyanurate foam core bonded in the foaming process to 1 2 thick duraboard an expanded perlite mineral aggregate board on one side and a fiber glass reinforced facer on the other. These are can be supplied with rebated edges which interlock reducing the risk of uplift. High quality rigid foam insulation that is properly installed will greatly improve ventilation eliminate drastic temperature fluctuations inside the home and protect from leaks.

You can even place it under the foundation slab. With a flat roof this issue does not arise but the u value constraint and the amount of insulation needed is just the same. The insulation for a warm roof will usually be boards of extruded polystyrene or rigid compressed boards of glass fibre or rock fibre. Here are the best insulation materials along with prices features and r values.