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There are various roof devices offered in today's market, each along with a variety of strengths and weak points. Listed below I am going to describe each system briefly, and after that detail the benefits and drawbacks.

Thermoplastic and PVC- Single ply, could be robotically fastened, entirely adhered or ballasted.

Pros- Top-notch efficiency in ponding water scenarios. Incredibly lightweight roofing systems, round 30lbs. every one hundred sq. ft. Can be found in white if an awesome roof is wanted, or even in numerous various colours for aesthetic issues. One more plus with these roof coverings is actually that sizable custom made industry sheets can be purchased from the manufacturing facility, lessening joints closed due to the workers on the jobsite. Resistant to ozone, algae and field seams are 3-4 times stronger than EPDM submitted seams. There is actually additionally an enormous volume of flexibility in the material. And because seams may be joined along with hot air, there are no noxious fumes to handle. Both 15 and twenty years guarantees readily available.

Downsides- Being actually solitary ply, they are actually prone to thrown out cigarettes, sudden things fell on the membrane layer, and also defective glass coming from bottles thrown on roof (this occurs a GREAT DEAL) I normally prevent clients coming from mounting these sorts of units if the roof possesses a ton of feet website traffic or even is actually effortlessly available to unapproved employees. Before, product shrinking was at times a serious issue on Thermoplastic and PVC roofing systems, but changes in composition and production has actually mitigated this concern. These roof coverings still reduce in time, though certainly not to the point of failing as previously.

Profits- Fantastic roofs, especially on roofs that pond water intensely, just as long as the roof is actually usually easily accessible simply to licensed workers.

Asphalt Altered Bitumen- This roof is what a lot of people phone a rubber roof, when it resides in reality made up primarily of asphalt. It comes in 3 ft. wide rolls and is actually often torched cognizant an open fire, though they could be applied with warm air welders in particular ailments also.

Pros- In my opinion, the biggest strength of these rooftops is actually exactly how effectively they stand up to outside worries. They manage feet web traffic better than some other membrane layer, as well as are challenging to puncture, specifically if they possess a granulated surface area. These roofing systems are thus hard as a matter of fact, that many insurance companies will not also acknowledge hail harm as they carry out on other roofing systems (I have individually observed customized roofs positively pounded with hail and also visit totally undamaged).

Drawbacks- The absolute most glaring disadvantage along with these units is that there is a joint every 3 feet, that makes for a TON OF seams. If you have an attentive staff with a competent supervisor that will certainly make certain that every joint on the roof is triple examined, you'll most likely be alright using this system. Or even, you could be pretty sure you will end up with leaks fairly soon, well before the warranty expires in my experience. And large ponding areas of water on these systems will degrade the material prematurely.

Bottom line- With a good, experienced crew this can be a good roof on a building that does not pond water excessively. And if you have a building with a lot of rooftop foot traffic, this is probably the only way to go.

Foam roofs- This system is applied with a large spray unit, spraying two liquid components (isocyanate and resin) When the liquids are mixed together, they expand 20-30 times and will adhere to concrete, wood, steel and most existing roof systems, but according to the manufacturers, NOT to modified bitumen.

Pros- When complete, the roof is monolithic with no seams, fully adhered and has insulating properties.

Cons- Full disclosure, I have limited experience with these roofs here in NE Illinois. We don't install them, but I have been on 9-10 buildings with this system, and all of them leaked badly, in a couple of cases within months of being installed. Leaks are very difficult to track down and difficult to fix even when found, as repair materials don't adhere to this surface very well.

Bottom line- Based on my admittedly limited experience with this system, I would not advise my clients to go this route when a new roof is needed.

EPDM Rubber- Rubber roofs can be fully adhered, mechanically fastened or weighed down with ballast (Riverbed gravel or pavers) They are versatile, appropriate for many installations and have a long track record.

Pros- Rubber roofs are relatively inexpensive, easy to install and repair. They are available in large sheets to minimize the number of field seams, and there is quite bit of flexibility in the membrane.

Cons- Field seams on these roofs are not as strong as Thermoplastic roofs. Flashings and roof edges tend to wear out more quickly than the remainder of the roof. Shrinkage over long periods can be dramatic in some applications.

Bottom line- Can be a good investment for a building owner, but all of the circumstances of a given installation must be carefully weighed. And good workmanship on the install is vital.

Spray applied roofing- These are not technically re-roofs, they are considered coatings. Some companies refer to them as "re-plys", as you are essentially adding a ply to the existing roof surface. There are numerous manufacturers offering various products with different compositions and specification, too numerous to go into fully here. If an existing roof is experiencing leaks but has not advanced to the point of outright failure, them may be good candidates for this solution.

Pros- Can be extremely cost effective, especially on roofs that have a lot of projections and rooftop HVAC units. The material is pure white, which in some cases (especially on metal roofs) can dramatically reduce AC cooling costs. As this is considered to be roof repairs rather than a new roof, there are tax advantages as well.

Cons- The existing roof must still be in somewhat decent condition. If applied to a roof that has already failed, your money will basically be wasted. Also, since this material is sprayed on, any cars within 100 ft or so must be moved during the application process, as this material will be extremely difficult if not impossible to remove from a car's finish. Some manufacturers do not warranty this material if there is ANY ponding water on the roof. Can not be applied to a roof with an existing gravel ballast.

Bottom line- This solution may save a building owner a lot of money, if the existing roof is in good enough condition to accept the coating. Excellent solution for metal roofs in particular.

As you can see, there are many different solutions to your flat roofing needs. It is vital however to choose a roofer who will recommend the best system for your particular roof and circumstances, and not the best solution for his wallet. Be sure you understand why a roofer is recommending a particular system for your project, and which system will be the best investment for Website you.