Residential Flat Roof Insulation

These products provide a high r value inch excellent sound attenuation characteristics and outstanding fire performance.

Residential flat roof insulation.

Insulating a roof from inside is technically feasible. Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board. Products are also inorganic non combustible and mold resistant. 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. From there the flat roof system you choose will determine the materials you apply. With a flat roof however this becomes a major concern. In fact it may cause damage in the long term.

It s what s called the cold roof principle. That accounts for its materials membrane insulation and decking as well as snow and rainfall and even for equipment like an air conditioner. Since your attic is insulated i would advise at least 2 of polyiso insulation in the roof for good measure. Better to have 3 or more.

The typical u value of an existing uninsulated flat roof is 1 5w m2k. 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. Different types of roofing insulation exist including blanket insulation blown insulation and rigid insulation. Rockwool products are available with a bitumen or mineral coated fiberglass face to be used in a number of roofing solutions.

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. This system was often used in the past but is not recommended nowadays. Can a flat roof be insulated from inside from the ceiling of the area below. The type that is right for your flat roof insulation job depends upon the state of the roof expert opinion on the best type and your budget.

Recommended roof insulation r value is 38 r but ideal is to have 50 r or more.