There are many different roof systems offered in today's market, each with various staminas and weak points. Below I will certainly describe each system briefly, then list the cons and pros.
Thermoplastic and PVC- Single ply, can be mechanically affixed, fully adhered or ballasted.
Really lightweight roofings, in the community of 30lbs. One more plus with these roofing systems is that large customized made field sheets could be gotten from the manufacturing facility, lessening seams sealed by the staff on the jobsite. Immune to algae, area and ozone seams are 3-4 times more powerful than EPDM submitted seams.
Cons- Being solitary ply, they are prone to disposed of cigarettes, sharp objects went down on the membrane layer, and damaged glass from bottles tossed on roof (this occurs a LOT) I typically dissuade consumers from installing these types of systems if the roof has a great deal of foot traffic or is quickly accessible to unauthorized employees. In the past, product contraction went to times a severe trouble on Thermoplastic and PVC roofing systems, yet modifications in composition and production has actually relieved this problem. These roof coverings still reduce in time, though not to the factor of failure as in the past.
Bottom line- Great roof coverings, particularly on roofings that pond water greatly, as long as the roof is generally obtainable just to licensed employees.
Asphalt Modified Bitumen- This roof is what a great deal of individuals call a rubber roof, when it is in truth made up generally of asphalt. It comes in 3 ft. broad rolls and is usually torched with an open flame, though they could be used with warm air welders in specific problems as well.
Pros- In my viewpoint, the greatest toughness of these roofings is how well they withstand outside stress and anxieties. They handle foot traffic far better compared to other membrane layer, and are tough to pierce, especially if they have a granulated surface. These roofings are so hard actually, that most insurance companies won't even recognize hail damage as they do on other roofing systems (I have personally seen modified roofs absolutely pummeled with hail storm and appear entirely intact).
Cons- The most obvious drawback with these systems is that there is a joint every three feet, which makes for a LOT of joints. If you have a thorough crew with an experienced foreman that will make certain that every seam on the roof is triple examined, you'll possibly be fine with this system.
Profits- With a good, seasoned team this could be a good roof on a structure that does not pond water exceedingly. And if you have a building with a great deal of rooftop foot web traffic, this is possibly the only way to go.
Foam roofings- This system is applied with a big spray device, spraying two fluid parts (isocyanate and resin) When the liquids are mixed with each other, they expand 20-30 times and will certainly follow concrete, wood, steel and most present roof systems, but according to the suppliers, NOT to modified bitumen.
Pros- When total, the roof is monolithic without any joints, fully adhered and has protecting residential properties.
Disadvantages- Full disclosure, I have limited experience with these roofing systems right here in NE Illinois. We do not mount them, yet I have actually gotten on 9-10 buildings with this system, and all of them leaked terribly, in a number of situations within months of being installed. Leaks are extremely hard to find and tough to deal with even when discovered, as fixing products do not stick to this surface quite possibly.
Profits- Based on my unquestionably minimal experience with this system, I would certainly not recommend my clients to go this route when a brand-new roof is required.
EPDM Rubber- Rubber roofings could be completely adhered, mechanically considered or secured down with ballast (Riverbed gravel or pavers) They are flexible, proper for numerous installations and have a long record.
Pros- Rubber roof coverings are reasonably inexpensive, very easy to repair and install. They are readily available in large sheets to minimize the variety of field joints, and there is fairly little bit of flexibility in the membrane layer.
Cons- Field joints on these roofings are not as strong as Thermoplastic roofings. Flashings and roof sides tend to wear out quicker than the rest of the roof. Shrinking over extended periods can be dramatic in some applications.
Profits- Can be a good financial investment for a building proprietor, but every one of the situations of a given setup must be meticulously weighed. And excellent workmanship on the mount is important.
Some companies refer to them as "re-plys", as you are essentially adding a ply to the existing roof surface. If an existing roof is experiencing leaks however has actually not progressed to the factor of straight-out failing, them could be excellent prospects for this solution.
Pros- Can be incredibly inexpensive, specifically 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) could significantly decrease Air Conditioning cooling costs. As this is thought about to be roof repair work rather compared to a brand-new roof, there are tax advantages.
Disadvantages- The existing roof has to still remain in somewhat decent problem. Your money will primarily be lost if applied to a roof that has actually currently failed. Since this product is sprayed on, any kind of cars within 100 ft or so need to be moved throughout the application process, as this material will certainly be incredibly difficult if not impossible to get rid of from a car's surface. Some suppliers do not guarantee 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 option could conserve a building roof replacement cost features owner a great deal of loan, if the existing roof is in sufficient problem to accept the layer. Outstanding option for steel roofs particularly.
As you could see, there are several solutions to your flat roofing requirements. It is crucial nonetheless to pick a roofer who will recommend the very best system for your specific roof and conditions, and not the most effective solution for his purse. Make sure you recognize why a roofer is recommending a particular system for your project, and which system will be the most effective investment for you.
Cons- Being single ply, they are at risk to thrown out cigarettes, sharp things dropped on the membrane layer, and damaged glass from containers thrown on roof (this takes place a LOT) I generally discourage consumers from mounting these kinds of systems if the roof has a whole lot of foot web traffic or is quickly available to unauthorized personnel. These roofs are so tough in reality, that many insurance companies will not even recognize hail damages as they do on various other roofing systems (I have directly seen customized roofing systems absolutely mauled with hail and come out entirely intact).
Cons- Field seams on these roofing systems are not as solid as Thermoplastic roofing systems. Flashings and roof edges tend to put on out much more rapidly than the remainder of the roof. As this is considered to be roof fixings rather than a brand-new roof, there are tax benefits.