Flat Roofing

2019 Flat Roof Guide: Installation Cost, Materials, Pros & Cons

A flat roof looks and performs very differently compared to a traditional sloped roof such as shingles, tiles, or metal. While its not designed to be a water shedding system, because it has a low pitch, flat roofing can still protect your home from leaks and severe weather. Today, there is a wide range of cutting edge flat roof systems that offer distinct pros and cons, longevity, and of course, price.

In this guide:

Flat roofing materials
Cost of installation
Materials prices
Installation options
Longevity
Durability
Importance of insulation
Maintenance and repair
Unique applications and benefits
Energy efficiency
Environmental impact

Types of flat roofs

Flat Roof over a Screened-in Porch

A classic flat roof is either almost completely level or has a very slight pitch of 3 in 12 inches or less.

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Flat Roof Repair: Causes of Leaks, Repair Costs & DIY Fixes

Is your flat roof leaking again? If your roof is relatively new, repairing any leaks or damages should be your first go-to solution.

An average flat roof repair costs around $400-600, which is significantly cheaper than the cost of full replacement.

Moreover, having a pro repair your flat roof can easily extend its service life by at least 3-5 years. However, in some cases, trying to fix a leaking roof membrane might be a futile effort and a complete waste of money.

Often leaks, water damage and other issues may be the result of faulty installation, poor maintenance, or old age of the roof itself.

We will go through the common flat roof problems and signs that warrant repair vs replacement,

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Flat Roof Replacement Cost Calculator

On average, the price to install or replace a flat roof is $5-10 per square foot. A 1,600 sq.ft. flat roof costs $8,000 – 16,000.

Estimate installation prices for the following flat roof materials: 1. Single Ply Membranes (TPO, PVC, EPDM Rubber); 2. Modified Bitumen; 3. Rolled Roofing.

Roof Size:

x ft.

Curbs (Skylights / Chimneys / Hatches)

#

Parapets length:

ln. ft.

Insulation:

1/2″ Fiberboard
1″ ISO Board (6-R)
2″ PolyISO (12-R)
3″ PolyISO (18-R)
3.3″ PolyISO (20-R)

Roof Pitch:

Flat (0)
1/12 (4.5 degrees)
2/12 (9.5 degrees)
3/12 (14 degrees)

Old Roof Removal:

YES – 1 layer
YES – 2 layers
NO

Job Complexity:

Simple
Medium difficulty
Difficult

Roofing material:

EPDM (Black Rubber)
PVC Roof 50-mil
TPO Roof 45-mil
Tar & Gravel/BUR
Rolled Roofing
GAF Liberty / Flintlastic

Region (US Only):

National Average
New England
Mid Atlantic
South Atlantic
East South Central
West South Central
East North Central
West North Central
Mountain
Pacific

In recent years flat roofs have grown in popularity because of their distinctly modern look,
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PVC Roofing Calculator: Estimate PVC Membrane Prices

Among flat roof options for residential homes, PVC roofing stands out for its exceptionally long service life, durability, leak-free seams and energy efficiency.

The average cost of a PVC roof is $6.5-8 per square foot installed, depending on the quality and thickness of the membrane.

Use this calculator to get an accurate estimate for installing PVC on your flat roof. Price quote includes: all materials and accessories, labor, tear-off and dump fees.

How Much Does A PVC Roof Cost?

Modern Flat Roof - PVC material

Installed on a 1,600 sq.ft. ranch style home, a PVC membrane costs $9,300-13,950. Prices differ primarily due the thickness of the material.

50 mil is the thinnest and also the cheapest.

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IB Roof Systems Cost: Estimate Membrane & Installation Prices

There are many flat roofing options, but my personal favorite is IB Roof Systems. On average, IB PVC costs $6.50 – 8.0 per square foot installed, depending on thickness.

The roof is made from a sheet of single ply thermoplastic membrane, reinforced with polyester mesh (scrim). Once properly installed, it will not leak!

I’ve been installing this flat roof since 2005, and in 12 years not one leaked, except for a mechanical damage to the membrane.

Here, I will discuss the features of the IB PVC membrane, its installation costs, as well as pros and cons.

How Much Does IB Roofing Cost?

On average you can expect to spend around $9,750-12,000 on an IB PVC roof installed on a 1,500 sq.ft.

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Rubber Roof Repair – How To Fix A Leaking Roof

Repairing rubber roofing is a fairly easy DIY job, if you have the right tools and materials.

I have been working with EPDM rubber membranes for over 15 years, and in this guide, I will teach you how to fix a leaking roof in just one weekend, all by yourself, for less than $230-280!

I will also discuss the benefits of doing a DIY repair vs. hiring a roofing contractor, and how much you will be saving.

Note:I will also showcase “EPDM Rubber Roofing Repair Kit”, which is a set of tools and materials designed specifically for DIY flat roof repair.

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TPO Roofing: Membrane Options, Pros & Cons, TPO vs. PVC

Among different flat roofs, a TPO membrane stands out as a high quality material that offers the best value.

Proven durability, longevity, ease of maintenance and reasonable cost make it a top choice for both large and small scale building projects.

TPO material is available in a wide range of standard and custom colors, along with different style options. It will look equally attractive on a traditional Cape or Ranch Style home, as well as a contemporary one.

If you are considering a TPO system for your home, our comprehensive guide will provide essential information that will help you decide whether or not it is right for you.

What is TPO?

White TPO Roof on a Contemporary Ranch Style Home

“TPO”

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2019 Costs for TPO Roofing: Installation & Membrane Prices, Insulation Options, Top Manufacturers

Currently, the average cost to install a TPO membrane is $5.5-6 per sq.ft. Out of all flat roofing materials, TPO is considered to be one of the longest lasting and durable options.

Your total price will depend on a number of factors, such as: roof size and complexity, membrane thickness, insulation quality, and labor charges.

Use the calculator below to quickly estimate your flat roof replacement cost using TPO.

How much does TPO roofing cost?

For a decent quality TPO membrane, pricing starts at $5.50-6.00 per square foot installed, without tear-off. For example, if you have a 1,500 sq.ft. roof, you total installation cost for TPO will be $8,500-9,000.

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2018 Rubber Roofing Material Prices

A rubber roof membrane is very affordable, with an average cost of $7,500-8,700,installed on a 1,500 sq.ft. ranch style home.

Low prices and ease of installation make EPDM rubber the most popular flat roof across the US.

Cost to install a rubber membrane roof

On average, homeowners across the US pay $4.5-5.0 per sq.ft. to install EPDM roofing.

Flat roof contractors charge about $75-90 per hour for labor.

The more penetrations (chimney, skylights, etc) and corners your roof has, the more complex, and therefore more expensive the install.

There is also a 10-15% premium charge for installations that are done on two storie houses or higher.

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2019 Insulation Cost – Estimate Foam Board Insulation Prices

The average cost of flat roof insulation is $0.67 per square foot (for 1 inch thick PolyISO with 6-R value).

High quality rigid foam insulation that is properly installed will greatly improve ventilation, eliminate drastic temperature fluctuations inside the home, and protect from leaks.

Here are the best insulation materials along with prices, features, and r values.

Cost Of Rigid Foam Board Insulation

Usually homeowners spend about 25% of the total cost to install a flat roof, on high quality insulation.

The most efficient and best insulation used is rigid foam (Polyiso); it accounts for over 60% of all installs.

ISO is available in a range of thicknesses,

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