How do you repair a built up roof?
Roof repair kits come with all the supplies you need to patch up a roof. Many of them include caulk for sealing cracks as well as patches for treating larger areas of damage on the roof membrane. Getting a kit means you don’t have to hunt down the individual components you need for a repair. Match the patch to the type of roof you have.
Which is the better roofing system?
- PVC roofing may be a lightweight material, but it packs a real punch regarding PVC roofing is secure and stable, and it does a superb job of resisting punctures, heat, ...
- EPDM also has an admirable reputation for durability. ...
- TPO is a less-tested product, and new generations are emerging as manufacturers continue to perfect it. ...
What type of roof is built up?
There are 3 types of Built-Up-Roofing, which include:
- Ballasted asphalt built-up
- Cold built-up
- Hot built-up
What are the components of a roof system?
What are the main components of a roofing system?
- Decking: Usually made from ½-inch plywood. ...
- Underlayment: Roof underlayment is a sheet of felt or synthetic material installed over the roof’s plywood deck before the shingles are fastened. ...
- Flashings: Roof flashing is one of the most critical parts of a roof. ...
Is built up roofing good?
Built-up roofs tend to provide excellent waterproofing and ultra-violet protection. Thanks to the aggregate top layer, they are also fire-resistant. Built-up roofing is generally low-maintenance and therefore costs little to maintain over its life.
How many layers does a built up roof have?
Built-up roofing systems are most commonly applied with three or four layers of roofing materials to make up the complete roofing system. These layers are typically a base sheet, a fiber sheet, and then either one or two layers of bitumen.
How is built up roofing installed?
First, contractors attach base sheets to the roof's subsystem using roofing nails. Then, they use tar, concrete, adhesive, or asphalt to glue down felt over the top of the base sheeting. Next, roofers install a layer of gravel or cap sheets, which they then cover with a final layer of asphalt.
What is another name for built up roofing?
A built up roof system is a popular choice for buildings with low-slope or flat roofs. Often referred to by the acronym BUR, this system has been used for 100-plus years in the U.S.
What materials are in a built-up roof?
A built-up roof is composed of three elements: felt, bitumen and surfacing.Felt—which is made of glass, organic or polyester fibers—serves much of the same purpose as reinforcing steel in concrete. ... Bitumen—either coal-tar or asphalt— acts as the “glue” that holds the felt layers together.More items...
How thick is built-up roofing?
How thick is built-up roofing? A BUR roof system comes in multiple layers, most often between two and four. The thickness depends on the materials used and the number of built-up roofing layers applied, but typically the selvage area ranges between two to four inches.
What is the difference between built up roofing and modified bitumen?
While the former type of roofing is installed onto the entire roof deck using adhesives, the latter system involves fastening the roofing membranes to the deck at different spots. Modified bitumen roofs have a mix of rubber and asphalt, which are finished with a top layer of gravel.
What is a 4 ply built up roof?
A 4-Ply roofing system involves roofing felts that are typically four plies composed of layers of reinforcement such as fiberglass or polyester felts, with each ply being embedded in a full bed of hot asphalt/bitumen.
What is a built up flat roof?
A built-up roof, most of the time referred to as BUR, is a time-tested roofing system typically comprised of hot tar and gravel. It is made up of many layers and typically the top layer is where the tar and gravel lie. This is a system that has been around and in demand for ages.
What is a 3 ply built-up roof?
A 3-Ply Hybrid BUR differs from other membrane options due to its combination of a 1ply base sheet with two plies of glass felt that enhances the performance of the membrane with a quicker installation time and less weight on the roofing system itself.
What is an SBS roofing system?
SBS modified bitumen roofing is a material made out of asphalt and synthetic rubber, making it an exceptionally flexible material for flat roofs. Thanks to its rubber composition, the material is less prone to cracking and sustaining damage from elements like ice and sun.
How do you remove a built-up roof?
0:302:41Precision Roofing: Flat Roof Removal - YouTubeYouTubeStart of suggested clipEnd of suggested clipArea by confining debris to an isolated area and accurately depositing into the dumpster below onceMoreArea by confining debris to an isolated area and accurately depositing into the dumpster below once the metal deck is prepared the precision crew lays down insulation.
What layers should a roof have?
Layers of the Roof and Their JobRafters / Joists. In your home the rafters and joists perform some very important tasks. ... Insulation. Insulation is installed between the roof joists as a way to lower utility bills inside the house. ... Breathable Roofing Felt. ... Batten. ... Flashing. ... Vents.
What are the layers of a house roof?
Understanding The Layers of a Roof and Why They Are ImportantFraming. The first layer of any roof is the framing. ... Insulation. Technically not on your roof but underneath it in the attic is a layer of insulation. ... Ventilation. ... Roof Deck. ... Water Barrier. ... Underlayment. ... Starter Strip. ... Shingles.More items...
How many layers should a flat roof have?
Asphalt shingles are most often allowed in up to two layers, but no more. For flat roofs, materials such as EPDM and TPO are usually approved for use up to two layers.
What are the layers on a flat roof?
Layers Upon Layers Modified Bitumen (Mod-Bit) can be up to six layers, depending on your needs: deck, insulation, plies, membranes, adhesives, and surfacing. Cap Sheet roofing is either two or three layers applied over your low-slope roof's insulation and deck.
How Long Does A BUR Roof Last?
BUR has been commonly used worldwide for many years, but how long does this type of roof last?
Can A Built-Up Roof Be Repaired?
The methods used to install BUR may make one wonder if you can repair this type of roofing if it becomes damaged or weather-worn? Or must this roofing be entirely replaced if it becomes damaged or worn?
Which Roofing Material Is The Most Durable?
Roofing materials do not last forever, but some last much longer than others. Which roofing material is the most durable, and how durable is BUR compared to other roofing materials?
What Is The Best Material For A Flat Roof?
Deciding on which material to use for a flat or a low-pitch roofs is a challenge. These roofs tend to collect water, they are constantly beat on by harsh sun rays, and they are susceptible to damage from weather events such as hail. Which is the best material to use for a flat roof?
How Much Does It Cost To Replace A Built-Up Roof?
Built-up roofing systems are some of the most cost-effective flat roofing systems available. We have established that these roofing systems are excellent for their price, but how much does it cost to replace a built-up roof?
Conclusion
Built-up roofing is one of the most cost-effective roofing solutions for building with flat or low-slope roofs.
What is modified bitumen roofing?
Modified bitumen roofs have a mix of rubber and asphalt, which are finished with a top layer of gravel. On the other hand, the top layer of ballast roofing is a mix of smooth river stone and larger gravel applied on a single- ply roof. Typically, bitumen built-up roofing systems have three or more component layers.
What is the most common roofing material for commercial buildings?
Built-up roof systems are the most common commercial roof for commercial buildings. The most used base sheet material is asphalt. Between these layers, there are roofing felts or ply sheets.
How long does a bur roof last?
The top layer consists of stone, gravel, crushed slag, or other aggregates. Typically, a built-up roof lasts anywhere between 15 and 30 years. BURs work well in warm climates since the BUR overlays are designed to cool the roof.
What is the best material for flat roofs?
PVC (Polyvinyl chloride) is a popular choice for flat roofs. Commercial roofing contractors install these PVC membranes by welding their seams and sealing them to the roof deck. White membranes reflect sun rays, keeping buildings cool. Not to mention, they are fire-resistant and can resist high temperatures. PVC roofs are also 100% recyclable. Since PVC has better chemical resistance, it is suitable for restaurants and other buildings.
What is the least expensive roof in Atlanta?
Commercial Roofing Atlanta – Flat Roofs. Flat roofs are the least expensive roof type and easily available type to install, as there is a lesser area to cover when compared to other roof types. They come in a variety of colors, roof membranes, and materials.
Why do roofs tear?
Damages happen due to thermal expansion or when the underlying insulation separates from the roof deck. If unchecked, these can cause tears to the roofing materials. No matter how minor the damages are, get your commercial built-up roof repairs completed as soon as possible.
Why is green roofing important?
While green roofing needs a lot of care and can get expensive, it increases the longevity of your building. Furthermore, it improves the insulation and cools the building by soaking up the heat. It is a versatile and sustainable option that enhances energy efficiency.
What is a bur roof?
Built-up roofing, also called BUR, is the most common roofing material used on low-slope roofs. It is composed of alternating layers of reinforcing fabric and bitumen (asphalt) and is finished with a top layer of aggregate, such as stone or gravel. BUR is preferred for low-slope, or “flat,” roofs because it creates a continuous sealed surface.
How long does a roof last?
Depending on the climate and the specific materials used, built-up roofing has an average life expectancy of 15 to 30 years, but some constructions can last up to 40 years. In general, built-up roofing tends to fare better in warmer climates than in cold regions.
What is ballasted roofing?
One special type of built-up roofing, called ballasted roofing, uses large stones (about 1 1/2 to 2 1/2 inches in diameter) for the surface layer. With a ballasted system, the lower layers are not adhered or fastened to the roof structure, and the heavy surface layer keeps the roofing in place.
Is built up roofing new?
Built-up roofing is nothing new. The concept been around for over 100 years, although the material and its installation certainly have evolved during that time. Modern built-up products incorporate a rigid insulation layer for improved energy efficiency.
Can you use liquid applied coating on a roof?
You can also use liquid-applied coatings on top of the repaired area if chippings aren't available. Undulations or waves: Repair built-up roofing undulations by simply adding layers on top of the area to level it. Make sure the substrate is in good condition before making any repairs.
Is bitumen hot or cold?
The bitumen can be either “hot,” meaning it is heated so that it liquefies during installation, or it can be “cold,” which is more like an adhesive and is not heated. Cold built-up roofing can be sprayed or applied with a squeegee. It does not give off toxic fumes during application and is not dependent on weather.
Is a built up roof waterproof?
Built-up roofs tend to provide excellent waterproofing and ultra-violet protection. Thanks to the aggregate top layer, they are also fire-resistant. Built-up roofing is generally low-maintenance and therefore costs little to maintain over its life.
What is a BUR?
Built-up roofing systems, or BUR, are a common type of flat roofing material. It’s literally built up using multiple layers of bitumen, felt, asphalt, and other materials to create the final result. They are relatively quick and easy to install and are applied layer by layer.
What are BURs Good For?
A built-up roof is great if you’re looking for low-slope roofs with heavy traffic (like commercial buildings) because it provides an easy installation process while still creating long-lasting protection from harsh conditions like wind and rain.
Pros of Built-Up Roofing
A built-up roof is useful because it can be applied on many different surfaces, and provides excellent waterproofing that’s perfect for a flat or low-slope roof. They also offer protection from the elements such as wind or rain because they are constructed with very heavy materials.
Cons of Built-Up Roofing
Despite its affordability and longevity, built-up roofing still has its fair share of downsides, mostly due to general wear and tear or incidents of storm damage.
How Does a BUR Work?
A built-up roof system is made of three parts: bitumen, ply sheets, and surfacing material.
How Long Does a BUR Last?
A built-up roof can last for 15 to 40 years, depending on the climate, construction, and materials used. Generally, these roof systems perform better in warmer regions.
About Applied Roofing Services
Applied Roofing Services is a full service roofing company located in CA. We offer durable and high quality residential and commercial flat roofing. We provide roof installation as well as roof repair services, roof maintenance and inspection services. We specialize in low slope roofs, energy efficient, zero maintenance, and green roofing.
What is a Built-up Roof?
A built-up roof is a type of “flat” or low-sloped roof made up of multiple layers of bitumen (asphalt or coal tar pitch) and reinforcing felts.
Useful Links for Built-up Roofing Information
1. General: For an informative, in-depth general article about various roof systems, see this page at the Whole Building Design Guide site, which is maintained by the National Institute of Building Sciences.
What is BUR and Its Components?
A BUR roof consists of 3 main components - bitumen material (asphalt), ply sheets (typically 36" wide and referred to as plies), and surfacing materials - one or multiple. These materials go into alternating layers of reinforcing fabric and bitumen.
BUR Types - Tar & Gravel vs. Ballasted
There are two primary types of BUR roofs - the Tar & Gravel system or the Ballasted roof system. Both types consist of multiple layers of material to make the roof classify as a BUR.
Pros of Built-Up Roof
There are many benefits to choosing a BUR roof type for your home. First, BUR roofs have excellent waterproofing. Second, the construction also protects the roof from damage against UV (ultraviolet) rays.
Cons of Built-Up Roof
The biggest downsides of BUR roofs are the slow installation process, which means high labor costs. Plus, there will be hazardous fumes during the install when using hot bitumen, whereas cold bitumen won't cause harmful fumes.
Why is BUR Best For Flat Roofs?
The design of BUR roofs is perfect for flat or low-sloped roofs, making them the most popular choice for commercial buildings since the 1970s.
Common Problems or Basic Repairs
No matter what type of roof you pick, there is always the chance of damage. Therefore, it's always best to make repairs as soon as you notice signs of damage. Not making repairs can lead to costly and severe issues like damage to the materials or the roof structure.
BUR vs. Modified Bitumen Roof
While a built-up roof consists of multiple layers of material piled together, modified bitumen is another option for a low-slope or flat roof.
When was built up roofing invented?
Built-Up Roofing, or BUR for short, first appeared around the mid 1800’s. It is a roofing system where multiple layers of asphalt get applied between ply sheets (or felts) over the roof deck and insulation.
Why do architects use built up roofs?
Overall, a built-up roof is a popular option for architects and building owners for its durability, widespread adoption by many roofers, and ease of application . From the many roof substrates to choose from, built-up roofing should be on your short list.
What happens when snow falls on a roof?
When rain and/or snow falls on a roof or dew accumulates, it needs proper drainage to naturally get removed from the roof surface. If a “flat” roof is truly flat (and therefore has zero slope and improper drainage), that water will only get removed either through evaporation or absorption into the roof. Either way, it sits on the roof much longer than it should, leading to premature roof failure and increased chance of leaks into the building.
What is a bur roof?
Historically, BUR roofs were the first “flat” roofs to be used in construction. The familiar image of a man with a mop spreading black tar onto a roof invokes a certain nostalgia among the roofing community. If that roofer were to mop the hot tar onto a sloping surface, the fluid tar would simply fall down the slope with gravity. Therefore, the only place a BUR roof could be installed was and is on a flat surface. Eventually, the technology of the material evolved from “tar” to “refined asphalts” and from “paper” to “felt” – and the performance of BUR systems improved greatly.
Where is HVAC located on a roof?
HVAC equipment is commonly located on top of the flat roof surface , and the equipment itself, as well as the normal operational processes of the equipment can contribute to roof surface issues.
What is the bi-product of HVAC equipment?
HVAC roof top equipment intakes the outside air, filters it, and changes its temperature before supplying it throughout the building. A bi-product of conditioning the air is condensation vapor, which accumulates as water and must be removed from the HVAC equipment. Almost all HVAC equipment uses a form of condensation pipe to provide a path for this water bi-product to drain from the unit to and off the roof.
Types of Built-Up Roofing
Built-Up Roofing Lifespan
- Depending on the climate and the specific materials used, built-up roofing has an average life expectancy of 15 to 30 years, but some constructions can last up to 40 years. In general, built-up roofing tends to fare better in warmer climates than in cold regions. This lifespan makes built-up roofing comparable to composition (asphalt) shingles, which last between 15 and 30 years, dep…
Pros and Cons of Built-Up Roofing
- Built-up roofs tend to provide excellent waterproofing and ultra-violet protection. Thanks to the aggregate top layer, they are also fire-resistant. Built-up roofing is generally low-maintenance and therefore costs little to maintain over its life. On the downside, built-up roofing can be slow to install and, with the exception of cold bitumen processes, installation involves hazardous fumes…
Basic Repairs of Built-Up Roofing
- As with all types of roofing, damage to built-up roofing should be repaired as soon as possibleto prevent further damage to the roofing or the construction materials below the roofing. Several common problems can be remedied with relatively simple repairs. 1. Open joints:To repair joints or seams that have separated, add some cement under the open seam and make sure to hold it …