SPF Vs. Built-Up Roofing Which Is The best for a Flat Roof?
If you think of an open roof for a business, you might picture black tar being swept across the roof. There are a variety of options to satisfy your price and performance needs.
What is it that makes "conventional" built-up roofing distinct from spray Polyurethane Foam Roof?
Roofing Systems wants to ensure that our potential customers are provided with the most up-to-date information. So, we've written an article outlining the differences between built-up and SPF roofing systems to ensure that you can make an informed decision about the right roof for your company.
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Roofing with Tar and Gravel
Built-Up Roof Systems have been in use in the United States for more than 100 years. "Tar and gravel" roofs are the most frequent names for these roof systems. Built-up roofs consist of layers of tar and asphalt which are applied directly onto the roof. There is the option of choosing the number of layers (or plies) to be installed. The final layer of a roof structure is constructed up of stone or gravel.
Roofing Spray Polyurethane Foam (SPF). The liquid is applied to an existing roof. It expands into a foam and forms the solid layer.
Although SPF roofing is not the most well-known form of roofing material however, it has been utilized in commercial, industrial and residential structures in the 1960s.
Installation and Performance of Spray Polyurethane Foam Roof
COST
A roof that has been constructed up.A typical roofing system that is built up is priced between $5.50 to $8.50 per square foot of labor and materials for a typical business roof. This price range can fluctuate dependent on the type of material you pick. SPF Roofing is a firm that is specialized in roofing.
A typical SPF roofing system can cost between $4.00 and $7.00 per square foot of material and labor for a typical 20,000 square foot business roof. The range of prices below is based upon a typical-thickness SPF roofing system , as well as the structure of the structure. A roof with a spray foam coating is able to pay for itself in 5-10 years due to energy savings.
INSTALLATION
The Parma Ice Rink Building has an SPF roof that was installed by Roofing Systems. The roof's initial layer can be applied to the roof's substrate directly. To create a smooth and secure work area an initial sheet of base material can be fixed to the roof when needed. In a built up roofing system it is possible to have layers of bitumen alternated with reinforced fabric. Property managers have the choice of choosing between three, four or five ply roofs to meet their needs and budget.
The final layer, which is comprised of stone or stone, protects the layer beneath it from UV radiation, excessive heat or cold and wind-related harm. To make it more visually attractive, a layer of gravel is applied. Before the installation can begin, the current roof must be cleaned. This is usually done through using a 3500 PSI pressure washer.
Instead of removal of the entire roof the contractor will only remove the saturated areas. Roofers in the roofing industry in Harrisburg will prepare the substrate by cleaning away all dirt, dust and pollutants.
The polyurethane foam is the initial layer that is laid by the contractor. It is produced by mixing two liquids and spraying them onto the roof's substrate. After the liquid is sprayed over an existing roof, it expands and forms an solid foam layer. When the SPF layer is complete and cured, it is coated with layers of acrylic or elastomeric silicon with embedded granules.
ADVANTAGES
If installed correctly and maintained A commercial built-up roof can last for 40 years. Other benefits of roofs with built-up systems are:
- The waterproof and seamless surface is completely seamless. The seamless solid surface is waterproof and has no seams or joints, which means that leaks are blocked in the most vulnerable areas.
- UV Rays are reflected- UV protection provided.
- Low maintenance -- Once the system is installed there is very little maintenance needed.
The Asphalt Roofing Manufacturers Association has more information. SPF Roofing is a company that is specialized in roofing. A commercial spray foam roof can last for years when it is properly maintained. SPF roofing systems offer many other advantages.
- SPF delivers thermal, air and water barriers, giving it the most efficient R-value of 6.6 per square inch.
- Durable -- Because the foam material may expand and contract during construction, cracks and splits are less likely. SPF is sturdy enough to walk on with a compressive strength of 50 PSI for each square inch.
- Invisible and waterproof The continuous solid surface is completely waterproof and is free of seams and joints, which means leaks are avoided in the most vulnerable locations.
- It is environmentally friendly. In many cases, the original roof is only lightly stripped which eliminates the need for expensive roof tear-offs and debris. SPF roofing materials are also ecologically friendly, having zero Ozone depletion potential (ODP) and low volatile organic compound (VOC) emissions, no chlorofluorocarbons (CFCS) and extremely low global warming potential (GWP).
- Repairable easily -- Identifying places that require attention is simple. Always keep an eye out for any flaws in the paint. What you need to do is wash and dry the surface, then fill in the crack using coating and smooth it out.
- Quickly installed - During an installation, only those areas that are saturated on the roof have to be removed and replaced (rather than the whole roof) thus reducing time and money.
- Water is unable to move laterally, thus if a break appears there is a chance that the water remains in the foam. Due to the closed-cell design of foam, it is unable to continue its journey.
Disadvantages:
Built-up roofing systems have been around for many years, but they will only last so long as the roofing is well maintained. Other drawbacks of built-up roofing systems are:
- Installation time can be longer.
- It is able to produce hazardous gas and vapours when it is in use.
- Weight - Increases the structural weight of the structure.
- Costs for installation - A spray foam roof will cost more than traditional roofing.
- UV Rays - UV rays with no top layer of the gravel may quickly cause the membrane to degrade.
- It's hard to detect leaks in a roof that is full of gravel and stones.
- Allows Water to Move Laterally The flow of water can be laterally through the insulation, creating leaks all over the building.
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Burns Home Improvements
Elizabethtown, PA 10722, United States.
717-804-6478