Choosing the correct replacement for an aged roof – or identifying the best choice for a new building – is no easy task. The perfect roofing solution for one building may be the worst option for another just down the street. That’s because no two buildings are precisely alike, even if they closely resemble each other. So how do you choose a new roof, given all the choices in the marketplace? You can start by asking a series of questions, before you choose the roof, the roofing contractor or the manufacturer.
1. What is this building’s mission statement?
Before calls are made to Detroit Roofing Service, the first item to address is the company’s mission statement as it relates to the building.
You need to know as much about the building and its future as possible.
Does the roofing company plan to keep this building as part of its real estate assets for the next 10 to 20 years? Are there any plans to expand it in the near future, or to change its use? What are its current and future occupancy, insulation requirements, aesthetic priorities and even the maintenance schedules for rooftop equipment?
If it’s a spec building, maybe you only need a basic roof.
For example, as more companies move toward operating 24 hours daily, seven days a week to satisfy global customers, the data center must never spring a rooftop leak. Water on computer systems generally spells disaster.
A special set of concerns arise for cooling-dominated climates. Does the roof contribute to air conditioning savings and address other key issues? Is it part of a total energy program? There is a growing concern about urban heat islands. Reflective, puti na gawa sa pawid ay naging ng interes sa mga lugar na iyon para sa isang ilang mga kadahilanan. Panatilihin ang mga ito sa gusali palamigan, bawasan air conditioning mga gastos at din mabawasan ang init-loading ng nakapalibot na kapaligiran.
2. Ano pisikal at iba pang mga elemento iimpluwensya ng atip sistema ng pagpili?
Pagkatapos na nagpapakilala sa mga layunin at misyon ng isang pasilidad, ito ay oras na upang pag-aralan ang gusali mismo.
Pagdating sa bubong kapalit, kailangan mong ilista ang mga katangian ng ang bubong na lugar mismo. Pinakamainam na detalye laki ng bubong ni, hugis, libis, deck construction, edge detailing, protrusions, rooftop access and existing roofing system. Along with this basic information, you need to find out why the original roof is no longer adequate.
3. What flexible-membrane roofing options are available?
Thermoplastic membranes are based on plastic polymers.
Like other thermoplastics, Hypalon materials are heat sealed at the seams.
Modified bitumen membranes incorporate the formulation and prefabrication advantages of flexible-membrane roofing with some of the traditional installation techniques used in built-up roofing. Modified bitumen sheets are factory-fabricated, composed of asphalt which is modified with a rubber or plastic polymer for increased flexibility, and combined with a reinforcement for added strength and stability.
4. Which type of membrane and attachment system are best for the building?
Many factors determine the best system for a particular building. For most buildings, there are a number of options and advantages that need to be weighed against the facility’s mission statement. The decision should not be made only on the basis of cost. Other important considerations for membranes are building height, wind exposure, anticipated roof traffic and aesthetics.
A steel or wood deck that easily accepts fasteners makes a good substrate for a mechanically fastened membrane.
For those concerned with building aesthetics, colored membranes can make an attractive contribution to the building’s appearance.
5. Does all roofing material delivered to the job site bear the UL label?
If not, specify that it must. This is the only way you can guarantee that the roofing materials installed on your roof are the same materials tested by Underwriter’s Laboratories.
Make sure that the product you are getting is the actual product that was tested. Hindi mo nais ang isang bagay na katulad ngunit hindi katumbas. Hanapin ang label sa mga site ng trabaho at tiyakin na ang lahat ng mga bahagi ng sistema ay nasubok magkasama. Gusto mong ang lamad nasubok sa ang pagkakabukod na ikaw ay gumagamit sa iyong gusali.
6. Ba ang sistema ay nangangailangan ng isang hangin paunlarin rating?
Wind pagtaas pinsala ay maaaring maging malawak at mahal. Tinanggap bilang isang pamantayan sa industriya, American Society of Civil Engineers Standard 7-95, “Minimum Disenyo baldeng para Buildings and Other Structures,” can be used to determine the wind zone of the building. Wind uplift testing, such as that performed at Factory Mutual or Underwriters Laboratories, can be used to determine that the selected roof system meets or exceeds the local wind uplift requirements.
7. How much does the completed system add to the dead load weight of the roof structure?
In choosing any reroofing option, the facility executive should be aware of the load-bearing capacity of the roof deck to make sure the right flexible-membrane option is chosen. In new construction, savings in structural steel can often be achieved by installing one of the lighter flexible-membrane systems.
Facility executives must assure that all relevant considerations, including weight, are taken into account in the decision-making process.
8. What are the expertise and financial strengths of the roofing contractor you are considering?
Roofing contractors need to be chosen with great care. The introduction of new roofing materials and application techniques within the past 10 years has led to many changes. A professional roofing contractor should be familiar with different types of roofing systems, to help you make the best decision for your facility, based on your budget.
Ask the contractor if his or her company is a member of a local, state, regional or national industry association. Contractors involved in professional associations generally are better informed on the latest developments and issues of their industry.
The installation of different roofing systems varies considerably. Education and training are the most important elements in the installation of roofing systems. Make sure the roofing contractor you choose has had detailed and ongoing training on the system being installed.
The National Roofing Contractors Association offers a professional roofing selection guide. In addition, many manufacturers have approved contractor programs with specific qualifications that roofers must complete before approval.
9. What is warranted and by whom?
There are two basic categories of roofing warranties. warranty Ang kontratista ay karaniwang sumasaklaw pagkakagawa. warranty ng gumawa ay sumasaklaw sa hindi bababa sa mga materyales, bagaman maraming pabalat ng karagdagang mga item. Kahit na warranty ng gumawa ay malawak, ito ay hindi ganap na protektahan ka kung ang bubong ay hindi tamang ikinabit.
Maingat na basahin at maunawaan ang anumang pang-atip warranty inaalok at panoorin para sa mga probisyon na nais magpawalang-bisa ito. For example, ito ay halos imposible upang maiwasan ang lahat ponded tubig. Ponded water can be caused by a clogged roof drain or deflection of the roof deck in between the support columns. Proper roof maintenance can help assure that the warranty remains valid. Be aware of warranty language that voids the guarantee.
Most professional roofing contractors will offer periodic maintenance inspections throughout the year. These inspections help ensure your project complies with the standards specified in the warranty.
10. After the roof is installed, what after service and educational programs are available for the facilities management team?
Specific courses are available to help building owners and facilities managers learn more about various roofing systems, materials and components; insulation and accessory products; elements of roof design; contractor selection; warranties and maintenance considerations.
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