There are many different roof systems readily available in today's market, each with various strengths and weak points. Below I will certainly explain each system briefly, and after that list the cons and pros.
Thermoplastic and PVC- Single ply, can be mechanically connected, fully ballasted or stuck.
Pros- Superior efficiency in ponding water situations. Extremely lightweight roofing systems, in the neighborhood of 30lbs. per 100 sq. ft. Comes in white if a cool roof is desired, or in several various colors for aesthetic worries. Another plus with these roof coverings is that large custom made area sheets could be purchased from the manufacturing facility, reducing joints secured by the crew on the jobsite. Resistant to algae, ozone and field seams are 3-4 times more powerful than EPDM filed seams. There is likewise a tremendous amount of versatility in the product. And given that seams can be welded with hot air, there are no poisonous fumes to manage. Both 15 and 20 year warranties available.
Disadvantages- Being solitary ply, they are prone to thrown out cigarettes, sharp things went down on the membrane layer, and damaged glass from bottles thrown on roof (this happens a LOT) I typically prevent clients from setting up these kinds of systems if the roof has a lot of foot web traffic or is easily accessible to unapproved employees. In the past, material shrinkage was at times an extreme problem on Thermoplastic and PVC roofing systems, but adjustments in structure and manufacturing has relieved this problem. These roofs still reduce gradually, though not to the point of failing as in the past.
Bottom line- Great roofs, specifically on roofings that pond water heavily, as long as the roof is usually obtainable only to authorized workers.
Asphalt Modified Bitumen- This roof is what a great deal of people call a rubber roof, when it remains in truth composed generally of asphalt. It is available in 3 ft. wide rolls and is normally torched down with an open flame, though they could be applied with warm air welders in certain problems as well.
Pros- In my viewpoint, the most significant strength of these roof coverings is just how well they take on outdoors stress and anxieties. They take care of foot web traffic much better than other membrane layer, and are challenging to puncture, specifically if they have a granulated surface. These roofings are so hard in fact, that many insurance companies won't also acknowledge hail storm damages as they do on various other roofing systems (I have personally seen customized roof coverings definitely pummeled with hail and come out completely undamaged).
Cons- The most obvious drawback with these systems is that there is a joint every 3 feet, which makes for a LOT of joints. If you have a thorough crew with a qualified supervisor that will certainly make sure that every joint on the roof is triple checked, you'll possibly be great with this system.
Bottom line- With a good, seasoned team this can be an excellent roof on a building that does not pond water exceedingly. And if you have a building with a great deal of roof foot website traffic, this is possibly the only means to go.
Foam roofings- This system is applied with a big spray system, splashing two liquid parts (isocyanate and resin) When the fluids are blended together, they expand 20-30 times and will stick to concrete, timber, steel and most current roof systems, however inning accordance with the makers, NOT to modified bitumen.
Pros- When complete, the roof is monolithic without any joints, totally adhered and has protecting properties.
Cons- Full disclosure, I have limited experience with these roof coverings below in NE Illinois. We don't mount them, however I have actually gotten on 9-10 structures with this system, and all of them leaked severely, in a few cases within months of being set up. Leakages are extremely difficult to find and challenging to take care of also when found, as repair work products don't abide by this surface area effectively.
Bottom line- Based on my unquestionably minimal experience with this system, I would not encourage my clients to go this route when a new roof is needed.
EPDM Rubber- Rubber roofings can be completely stuck, mechanically attached or considered with ballast (Riverbed crushed rock or pavers) They are flexible, proper for lots of setups and have a long record.
Pros- Rubber roof coverings are reasonably economical, easy to mount and fix. They are available in huge sheets to decrease the number of field joints, and there is quite here little bit of adaptability in the membrane.
Cons- Field seams on these roof coverings are not as solid as Thermoplastic roof coverings. Flashings and roof edges tend to wear faster than the remainder of the roof. Contraction over long periods can be remarkable in some applications.
Bottom line- Can be an excellent investment for a building proprietor, however all the circumstances of an offered installment should be very carefully weighed. And excellent craftsmanship on the install is essential.
Some companies refer to them as "re-plys", as you are essentially including a ply to the existing roof surface area. If an existing roof is experiencing leaks yet has not progressed to the factor of straight-out failing, them may be great prospects for this service.
Pros- Can be exceptionally economical, especially on roofings that have a great deal of estimates and rooftop HVAC units. The material is pure white, which in some cases (particularly on metal roofing systems) could significantly lower Air Conditioning cooling expenses. As this is considered to be roof repair work rather compared to a new roof, there are tax benefits.
Cons- The existing roof should still be in somewhat respectable condition. If put on a roof that has actually currently fallen short, your loan will basically be wasted. Additionally, given that this material is sprayed on, any kind of cars within 100 ft or two should be moved during the application process, as this material will certainly be incredibly challenging if not difficult to eliminate from a car's finish. Some makers do not warranty this product if there is ANY ponding water on the roof. Can not be put on a roof with an existing crushed rock ballast.
Bottom line- This remedy may conserve a structure owner a great deal of money, if the existing roof is in sufficient problem to approve the finish. Outstanding remedy for metal roofs particularly.
As you can see, there are various remedies to your flat roofing needs. It is important nonetheless to choose a roofer who will suggest the best system for your certain roof and scenarios, and not plenty of great affordable roofing out there the very best solution for his purse. Make sure you understand why a roofer is advising a specific system for your project, and which system will certainly be the best investment for you.
Cons- Being single ply, they are at risk to thrown out cigarettes, sharp items dropped on the membrane layer, and busted glass from bottles tossed on roof (this occurs a LOT) I usually prevent consumers from installing these kinds of systems if the roof has a whole lot of foot traffic or is quickly available to unapproved workers. These roofing systems check here are so tough in fact, that most insurance companies will not also identify hail storm damage as they do on other roofing systems (I have actually personally seen customized roofs absolutely mauled with hailstorm and come out totally undamaged).
Cons- Field joints on these roof coverings are not as solid as Thermoplastic roofs. Flashings and roof sides tend to put on out more rapidly than the rest of the roof. As this is thought about to be roof repair services rather compared to a brand-new roof, there are tax benefits.