Using Styrofoam For Flat Ceiling Roof Insulation

Spray foam using spray foam would be an excellent option.

Using styrofoam for flat ceiling roof insulation.

This is an even more dense and more expensive foam board insulation. Also called styrofoam insulation this is the least expensive material. Flat roof insulation installation the rigid foam board insulation we used was 2 thick and came in 4 x 8 sheets. It provides about r 5 per inch.

That styrofoam insulation will work but it is not cheap per r value however it gives you a great r value per inch. Such an insulating solution involves applying several layers of pur foam with each layer around 1 2 cm thick. Cold roof systems are highly inadvisable as insulation from the inside will inevitably lead to the formation of condensation. Of the three basic types blown in insulation is the easiest to install but it requires a skilled professional.

This is then covered with a further weatherproofing layer. Once the roof demo was complete and the flat roof was cleared of any remaining debris some rotted 2x material around the perimeter of the roof was replaced. Here we share the most common mistakes people make when installing flat roofing insulation. Looking upward through the open ceiling if the exterior wall and roof deck assemblies both contain spray foam then a continuous insulation and airtight layer is established from the base of the walls to the peak of the roof.

A very energy efficient enclosure results. One common use of extruded polystyrene foam board is for foundation insulation panels. This is by far the most expensive option. As part of insulating your flat roof be sure to contain and seal all bypasses.

In that situation the foam would be sprayed directly to the backside of the roof sheathing resulting in an un vented roof. This foam board insulation is available with straight or tongue and groove edges to help limit air movement. Image courtesy of d7 spray foam insulation houston tx. What insulation to use.

It is available in all different size configurations to accommodate lots of different applications. This type of un vented roof has proven reliable when properly installed. Some products have reinforced facing to make them sturdier. Blanket insulation or rigid styrofoam will be the least expensive but depending on the accessibility it may be difficult to.

Insulating an attic usually means you have a lot of room for insulation and you will need high r value so that is why the cheaper options are more popular blown cellulose or blown fiberglass. The effective roof insulation layer may range in thickness from 3 to 12 cm as needed. It provides r values that range from 3 6 to 4 2 per inch. Closed cell polyurethane spray foam will prove ideal for thermal insulation of a flat roof.

There are many different types and installation methods out there along with a lot misinformation about which products offer the greatest energy savings. Choose this option for areas that need a good amount of strength and water resistance.