Sloping Insulation For Flat Roofs

Dual purpose structural deck and insulating planks.

Sloping insulation for flat roofs.

The traditional fix is labor intensive creating a positive slope roof is traditionally done by installing rigid board insulation such as xps or polyiso on flat or low sloped roofs. Or sprayed polyurethane foam spf. Some of these roofs have parapets perhaps on just one side of the roof or perhaps on three or four while others have no parapets at all. Tapered expanded polystyrene eps roof insulation was developed more than 30 years ago with a dual purpose in mind.

Since the piece of iso is 4 long the thickness increase will be equal to 1 4 times 4 or a rise of 1 over the 4 distance 1 2 to 1 12 flat roofers can then arrange the sloped insulation to move water towards roof drains scuppers or gutters. The insulation used in low slope roof assemblies typically falls into one of the four categories. In this case ventilation is required and the roof can still become wet with condensation which may cause materials to decay. Laying flat roof insulation as a rule any roof with a pitch below 10 is classified as a flat roof.

Our old flat roof was a bit too flat so the slats actually created a bit more slope where needed. Cold roofs and warm roofs. Cold roofs have the waterproof layer placed directly onto the roof deck and the insulation inside the roof just above the ceiling. The insulation is under the sheathing because torching down onto insulation is probably not a great idea nor is walking on a torched down roofing material that is directly on top of relatively soft foam.

To drain and insulate dead level roof decks. Xps and polyiso are available in boards that are no more than a few inches thick. Rigid board insulation rigid boa. Insulation makes the difference in flat roofs.

Lightweight insulating concrete lwic. A typical interior roof drain assembly occupies about a 4 by 4 square area with a per foot tapered slope. According to the louisiana department of natural resources building guide flat or low sloped roofs often demonstrate better energy efficiency because of differences in insulation generally these roofs have a membrane system which is applied on top of sheets of rigid insulation. Manufactured from lightweight foam control eps tapered expanded polystyrene eps roof insulation is a value engineered system that has been proven in new and reroof applications all over the country.

As a general rule if the insulation is 2 thick or less a 4 by 4 is sufficient. There are two types of flat roof. This type of roof is common in urban areas for example on triple deckers in boston and row houses in philadelphia as well as in the southwest. Insulation for flat roofing is used to make a structure more energy efficient and minimise heat loss.

It s a roof that is flat or almost flat.