what does it cost to replace a flat roof on a townhouse in wahsington dc?

Published January 10, 2022

Written by HomeAdvisor.

2021 Notice: Material & Labor Prices are Surging

Need for roofing has grown over the by year. And, equally a result, manufacturers are increasing materials prices. Prices have gone up five% to 10% this year, and many parts of the country are experiencing long delivery times. If yous're planning a roofing project, we recommend starting equally early every bit possible in the flavour, preparing for potential cost fluctuations, and assuasive extra time to order materials.

Cost to Seal a Roof

The average cost to seal a roof is $1,222 and typically ranges betwixt $451 and $i,997. Even so, you may pay every bit picayune as $100 or as much as $iii,200 or more than. That'due south a total average of $0.65 to $5 per square foot. The type of roof, type of sealant used, the condition of your current roof, and your location all affect price. Coating a apartment or low-sloped roof is a mutual way to extend the life of your roof while cutting down on cooling costs.

Utilise roof coatings to low-slope and flat roofs in both residential and commercial settings. They are both a stand up-alone roofing or a topcoat for pre-installed materials. Information technology adds an extra layer of waterproofing, increases fire resistance and lowers cooling costs past reflecting heat. It likewise provides a layer of durability from chemical corrosion and physical abrasion. To extend the life of your roof and guarantee the highest quality seal, piece of work with a professional roofing contractor.

Notation: Mechanical fixes are e'er a better choice than coatings and sealants to stop leaks or repair cracks. If you lot notice a leak or damage, supercede and repair it earlier applying a coating or sealant.

Roof Sealing Toll Calculator

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National Average	$1,222
Typical Range	$451 - $ane,997
Low End - High Finish	$149 - $4,500

Cost data is based on actual projection costs equally reported past 1,186 HomeAdvisor members.

Type	Material Toll per Foursquare Foot	Installation Cost per Foursquare Foot
Silicone	$1 - $one.fifty	$0.50 - $1.00
Bitumen	$0.75 - $1.fifty	$0.50 - $1.00
Polyurea (Polyurethane)	$0.50 - $2.00	$1.50 - $3.00
Acrylic	$0.15 - $0.75	$0.l - $1.00
EPDM (Liquid Safe)	$i.50 - $2.50	$0.25 - $ane.00

At that place are many unlike types of roofing sealant, each with pros and cons. Most promise waterproofing and extended roof life (if sealing an existing roof) and ameliorate fire resistance. Some include white and reflective surfaces to reduce cooling costs while others are clear. Corrosion and chemical protection sealants are also available.

Silicone

Of all the roof coatings, silicone provides first-class immovability and long-lasting weatherproofing for a cost betwixt $4 and $1.l per square foot. It's sold as a full roof blanket that oft doesn't require a primer. Information technology is used equally the roofing for spray polyurethane foam (SPF) covering systems. If installing this yourself, be sure to use fabric or fibered reinforcement sheets. However, information technology loses its UV rating faster than virtually other types.

Bitumen

Bitumen costs $0.75 to $1.50 per square human foot. It's an asphalt-based sealant used around flashing, skylights and chimneys on asphalt roofs. Information technology's not used as a complete roof blanket and not often used on any complete covering membranes besides a Built-Upwardly Roof or Modified Bitumen Covering.

Polyurea (Polyurethane)

A relatively new roof coating, polyurea requires a primer and two coats and costs $0.50 to $two per square foot. It has the best insulating properties of all roof coatings. It's besides the nigh durable, suitable for high-traffic areas.

Acrylic

Acrylic is the cheapest at $0.15 to $0.75 per square foot, and the nearly popular elastomeric coating. However, information technology has a college failure charge per unit than any other type and will need a new coat every ten years, if not sooner. Excellent for DIY applications and brusk-term coating and sealing needs.

EPDM

Liquid EPDM creates a monolithic roofing system every bit opposed to EPDM sheets that create seams. Employ it on almost any roofing type with the right primer. EPDM is generally thicker than other types of roofing and toll about twice as much at $1.50 to $2.l per square foot. However, it often only needs a unmarried glaze.

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Calculating Costs by Roof Slope

The Roof Coatings Manufacturers Association, along with many contractors, recommend coatings for flat and low sloped roofs. Pitched roofs should utilize tiles or shingles where no blanket is necessary.

Flat Roof Blanket

Flat roof coatings will cost betwixt $0.15 to $two.00 per square pes for materials and an additional $0.50 to $iii.00 per square human foot for labor as broken down in the price per foursquare foot section above. This price is for a coating over a pre-existing roof arrangement, such as a rubber membrane or metallic roof.

Pitched or Sloped Roofs

Most pitched roofs are asphalt shingle or tile where complete coatings are non recommended. However, at that place are some exceptions and considerations when dealing with a pitched roof.

Metal: such as in residential settings, tin can utilize an elastomeric blanket for corrosion resistance or only to extend the life of the roof. You'll usually pay an additional $ane.00-$2.00 per foursquare foot since the coatings must exist practical in multiple sparse layers.
Asphalt Gyre: For small leaks and tears, elastomeric bitumen sealants run between $15 to $20 per gallon or about $half dozen to $10 per 10-ounce tube. Employ repair material in conjunction with these sealants. Fabrics volition cost well-nigh $10 for a 25-square pes roll.
Asphalt Shingle: Only apply bitumen or elastomeric sealants around flashing, vents and skylights. Using complete coatings on asphalt shingles is a short-term set up and may really exercise more than harm than skilful. Repairing or replacing your damaged asphalt shingles is the long-term solution. Supplant any underlayment and damaged roof sheathing as well. Considering that installing a new asphalt roof costs an average of $3,700 and a new tile roof costs an average of $eleven,500, the price of repairing asphalt shingles every bit a solution is well worth the investment.

If y'all're still assail coating shingles, y'all may want to try one of these options:

Envirosafe Shingle Roof Blanket: $230 per 5-gallon pail. It comes in a multifariousness of colors with a 10-year warranty.
Armor Shingle Roof Blanket: $380 per 5-gallon pail that claims a breathable but waterproof layer. It has a clear finish and volition cover approximately 1,250 square feet.
Membrane Style: is fairly rare to detect on a pitched roof, merely not out of the question. Depending on the type of material information technology'southward made from, y'all tin can install a complete coating to rejuvenate and seal your roof. Your electric current covering material will determine the type of coating you'll demand.

In that location are a few considerations to have into account that depend on the blazon of roof you currently accept. Whatever type you accept, exist sure to seek communication from a qualified specialist who works specifically with the material. Not all roofing contractors work on all types.

Polyurethane Foam Roof Coating (SPF)

Polyurethane cream roofs are one the best options for flat roofs. Part of a polyurethane foam roof is the topcoat, usually a silicone membrane. You'll probably want to recoat or seal your silicone roof with some other glaze of silicone for $1.50 to $ii.fifty per foursquare human foot, including labor. Verify what type of coat your roof currently has as various coatings do non always adhere to each other.

Metal & Aluminum Coating

Metal roofs are for flat, low slope and pitched roofs. You tin apply well-nigh any type of coating to a metal roof. For a pitched metal roof, expect to spend between $1.50 to $3 per square human foot on labor. Depending on the pitch of the roof, the coats are applied in thinner layers. It may demand more than than two coats and increase application time.

Asphalt Shingle

Mechanically repair and supplant all damaged shingles and underlayment. Y'all should never need to utilize a full blanket to any asphalt shingled roof. Bitumen, at $0.75 to $1.50 per foursquare foot, is used effectually flashing and other areas that surround the asphalt. You may use it to temporarily prepare a broken or leaking cobblestone shingle before you lot're able to supersede it fully.

Physical Tile

At that place is a lot of contend around sealing physical or clay tiled roofs. Physical is a porous material, but the pitch of the roof in conjunction with the overlaid arrangement keeps water out. At that place are some concrete sealants mentioned in the side by side department that you lot can utilise to concrete tile, however, repairing and replacing is the recommended solution.

Sealants are usually unnecessary and applying them may harm your roof. Applying sealants requires ability washing and walking on the tiles, both of which tin can damage your tiled roof. Speak with a professional concrete tile roofer before beginning any tile project.

Wood Shingle

Wood shingles never need any blazon of sealant. When wood leaks, you'll need to find the cause and mechanically fix the leak. Sealants can damage wood shingle and milkshake. If you take a wood roof, speak with a qualified, licensed wood roofing specialist for any repairs you demand.

Estimated Prices by Brand

Common brands found in the U.Due south. at hardware and home improvement retail stores present a cheap solution for the competent DIYer. Your contractor is likely purchasing directly from a manufacturer from the Roof Coatings Manufacturers Associated. Here are a few of the common retail brands.

Gaco: $0.70-$1 per foursquare foot. They make a wide range of 100% silicone, acrylic, polyurethane, epoxy, and spray foam products for waterproofing and insulation your home.
Henry: $0.15-$0.40 per square human foot. Makes acrylic and asphalt emulsion coatings and sealants. Manufacture full roofing systems, adhesives and spray foam insulation.
Black Jack: $0.25-$0.40 per square foot. Makes elastomeric siliconized coatings at a bargain price for a quick DIY chore. Brand cobblestone sealant for sealing cracks, valleys, flashing and chimneys for almost $15 per gallon.
Liquid Safety: $i.50-$1.75 per square foot. Makes 100% liquid EPDM products for thick applications. Brand caulks and fabrics used in EPDM applications.
Lanco: $0.50 per square foot. Makes a fully siliconized acrylic based roof blanket for waterproofing and heat reduction. It has one of the longer acrylic warranties bachelor at 15 years.
Ames: $0.65-$0.75 per foursquare human foot. Makes commercial grade acrylic and liquid rubber products for waterproofing roofing and decking.

Contact a professional roofer for a quote on these less common brands.

Uniflex: Available from Sherwin Williams.
Hydro Stop: a masonry and physical sealant. It's possible to use this on concrete tiles.
Dr. Fixit: fully adhered elastomeric for concrete roofs (concrete tile).
RoofSeal: creators of Ellemex an elastomeric coating for concrete tile and Reflect, a sprayed on acrylic coating for metal roofs.

Rent a pro to shine and seal your roof

Toll of Resealing a Flat Roof

A consummate tear-off and supercede of a apartment roof can price anywhere from $2,500 to more than than $eleven,000. Resealing your electric current roof can extend its life and avoid replacement. How often you demand to practise this will vary depending on the type, brand, coating thickness and climate.

For instance, a cheap acrylic may demand work every x years. High-end silicones often come up with 25 or fifty-fifty 50-year warranties. Though Polyurea has just been around for about 30 years, manufacturers oft merits this type of sealant to be the longest wearing.

Fluctuations in temperature crusade expansion and contraction, add together to that humidity levels and UV rays all wearing on your roof. The best way to know how often you lot'll demand to reseal is to talk to your roofing contractor. Ask them what type of roof to use for your climate and how oftentimes you'll need to reseal.

Reasons to Coat a Roof

Whether adding a coat when installing a new roof or just recoating an one-time one, there are several reasons it could be a good idea - price, waterproofing, reflecting heat, extending roof life, or flame and chemical resistance.

Waterproofing

All types of the sealants listed in this article make the merits of waterproofing - fifty-fifty going so far equally to claim a year-round ability to withstand ponding water. Silicone and Polyurea tend to withstand ponding better than other types of sealants. However, the best type will depend on your electric current roof and climate. Discuss options with your contractor.

Absurd Roof Coating for Reflecting Heat

Coating a roof with white helps reverberate solar radiations, reducing cooling costs by reducing indoor air temperature past every bit much every bit 20+ degrees. Acrylic, silicone, polyurea and EPDM all come in white. Nonetheless, silicone tends to lose its reflective abilities faster than other types of roofing.

If you are sealing a pre-existing roofing membrane you lot may only need one coat. This can reduce costs an average of $0.50 to $1.l per square foot.

Extend Roof Life

All the listed coatings claim to extend a roofs life. Even so, silicone and polyurea tend to practise it better than any others, but you lot'll spend twice equally much. Sealing a weathered roof, specially in harsh climates, tin extend the life of your roof ten to xx years.

If yous're on a tight budget, coating an existing weathered roof may cost $0.50 to $three less per square foot than a complete tear-off and supplant. Code allows no more 2 layers of roofing at any given time. However, blanket a roof is often allowed over these two layers. Additionally, some materials, like liquid EPDM and silicone, can end upwards costing more but removing and replacing the electric current covering organization. To salvage coin and extend roof life, employ elastomeric acrylics. They tend to be a cheap - though short-term - solution for tight budgets.

Flame Resistance

Prices vary for fire resistant products depending on type and manufacturer. Flame resistance with a UL class A rating is often required by lawmaking for all roof assemblies. Have a roof inspector determine if you need a flame-resistant product and if then, which one they would recommend.

Resist Corrosion

This is a priority for homes with metallic roofing near saltwater. However, yous have options. Silicone, acrylic, liquid EPDM and polyurea are all highly corrosion resistant.

Get a sealant applied to extend roof life

Cleaning and Repair Costs

Roof training for installing a coating includes cleaning. Primers and sealants won't adhere properly to a roof with dirt or debris. Without proper adhesion, the roof will fail and require replacement.

Almost sealants suggest ability washing your roof prior to application. It volition only price about $200 and assures total adhesion. Also, sealants aren't a substitute for mechanical repair. Repair holes, gaps and cracks start. Roof repair costs an boilerplate of $750. A licensed roofing contractor volition include this in their bid. If y'all program to tackle the preparation yourself, a roof inspection costs an average of $200.

Maintenance

Regular maintenance includes cleaning. Cleaning a roof costs an average of $400. Keeping it articulate of dirt, leaves and branches is an easy DIY job. Adept housekeeping to keep organic debris off the roof keeps mold, mucus, and moss from growing. Keeping it make clean extends its life. Plus, it also helps the white finish reverberate more than heat.

DIY or Hire a Pro?

Since the roof protects your home or business from the elements, it's best to consult a licensed covering professional. An experienced DIYer with the right tools may become this task done themselves to salvage about half the project price.

Notwithstanding, improperly installing a roof leads to, at best, added expense fixing the improper installation. At worst, extensive water harm to the homes structure. If you practise program to tackle the job yourself, use the proper prophylactic equipment and fully empathise how to seal a roof before starting.

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Source: https://www.homeadvisor.com/cost/roofing/seal-a-roof/