Flat Roof Insulation Techniques

The higher the r value the higher the insulating value.

Flat roof insulation techniques.

Cold roof a very bad idea. Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you build the roofs right and maintain them using commonsense rules. Cold roof systems are highly inadvisable as insulation from the inside will inevitably lead to the formation of condensation. A flat roof is defined as any roof that has a pitch of less than 10 degrees.

Protect water heaters to extend their longevity and lessen the amount of energy needed to heat your water. In practice a flat roof is pretty easy to spot because essentially it is horizontal. Box out light fixtures. Protect your garage external walls attic and basement initially as these areas are most vulnerable to temperature change especially with all the various types of roof insulation out there.

Ordinarily polyisocyanurate pir insulation is used within warm roof construction as it has excellent dimensional stability and compressive strength which enables it to withstand foot. The insulation for flat roofs is commonly produced as rigid boards making them easy to handle and install with the variety of waterproofing types and systems. Also flat roofs don t tend to have the loft space that you normally associate with pitched roofs so on the whole they won t have the loft hatch in. Standard fiberglass insulation has an r value of about 3 5 per inch of thickness fig.

This is then covered with a further weatherproofing layer. Homes with flat roofs require a different approach to insulation than the standard approach used for homes with pitched roofs. So even though flat roofs are ideal for drier landscapes in climates with heavy precipitation a properly installed flat roof can be a fine choice for a homeowner especially thanks to ever improving waterproof materials and installation techniques. What is flat roof insulation.

Pros and cons for flat roof materials all three types of flat roofing cost 250 to 350 per square 100 square feet but prices vary according to region and size of the roof. Water is insulation s enemy. To produce a hot roof rigid insulation is fitted outside above the weatherproofing. Because most flat roofs don t have an attic crawl space or venting.

Look for water stains on the roof sheathing or damp or moldy spots on attic joists and existing insulation as a clue to where leaks might be. This provides an insulating value of r 11 for 2 4 walls and r 19 for 2 6 walls.