There are many different roof systems offered in today's market, each with different toughness and weaknesses. Listed below I will explain each system briefly, and then provide the disadvantages and pros.
Thermoplastic and PVC- Single ply, could be mechanically attached, completely stuck or ballasted.
Really light-weight roof coverings, in the area of 30lbs. Another plus with these roofing systems is that big custom made field sheets can be ordered from the manufacturing facility, reducing joints sealed by the team on the jobsite. Resistant to algae, area and ozone joints are 3-4 times more powerful than EPDM filed joints.
Cons- Being single ply, they are at risk to thrown out cigarettes, sharp items dropped on the membrane layer, and busted glass from bottles thrown on roof (this takes place a LOT) I normally dissuade customers from mounting these kinds of systems if the roof has a lot of foot web traffic or is easily obtainable to unapproved personnel. In the past, product shrinkage went to times a serious trouble on Thermoplastic and PVC roofings, but adjustments in structure and production has relieved this problem. These roof coverings still diminish over time, though not to the point of failing as in the past.
Bottom line- Great roof coverings, particularly on roof coverings that pond water heavily, as long as the roof is usually accessible just to licensed workers.
Asphalt Modified Bitumen- This roof is what a great deal of individuals call a rubber roof, when it remains in reality made up generally of asphalt. It comes in 3 ft. vast rolls and is typically torched down with an open fire, though they could be used with hot air welders in specific problems.
Pros- In my opinion, the greatest toughness of these roofs is exactly how well they take on outdoors stresses. They deal with foot web traffic far better compared to other membrane layer, and are hard to puncture, especially if they have a granulated surface. These roofing systems are so hard actually, that the majority of insurance companies won't also identify hail storm damages as they do on various other roof coverings (I have actually directly seen customized roofing systems definitely pummeled with hail storm and come out completely intact).
Disadvantages- The most glaring negative aspect with these systems is that there is a joint every three feet, which makes for a LOT of joints. If you have a persistent staff with a qualified supervisor who will certainly make certain that every joint on the roof is triple inspected, you'll probably be great with this system.
Bottom line- With a great, experienced team this can be a great roof on a structure that does not pond water excessively. And if you have a structure with a lot of rooftop foot website traffic, this is most likely the only means to go.
Foam roofing systems- This system is used with a huge spray system, splashing two fluid components (isocyanate and resin) When the liquids are blended together, they increase 20-30 times and will adhere to 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 seams, fully adhered and has shielding buildings.
Cons- Full disclosure, I have limited experience with these roofings below in NE Illinois. We don't mount them, yet I have gotten on 9-10 structures with this system, and all of them dripped severely, in a number website of instances within months of being installed. Leaks are extremely hard to track down and difficult to repair even when located, as repair materials do not stick to this surface effectively.
Profits- Based on my unquestionably restricted experience with this system, I would not recommend my clients to go this route when a new roof is needed.
EPDM Rubber- Rubber roofing systems can be fully adhered, mechanically fastened or weighed with ballast (Riverbed crushed rock or pavers) They are versatile, appropriate for many installations and have a lengthy record.
Pros- Rubber roof coverings are fairly cost-effective, very easy to set up and repair. They are offered in large sheets to decrease the variety of field joints, and there is rather little bit of flexibility in the membrane layer.
Cons- Field joints on these roofings are not as strong as Thermoplastic roofs. Flashings and roof sides tend to break faster than the rest of the roof. Shrinkage over extended periods can be significant in some applications.
Bottom line- Can be a good financial investment for a building proprietor, but all the situations of an offered setup has to be very carefully weighed. And great workmanship on the set up is vital.
Spray used roofing- These are not technically re-roofs, they are thought about coatings. Some business refer to them as "re-plys", as you are essentially including a ply to the existing roof surface area. There many suppliers providing different items with different structures and requirements, too many to enter into fully right here. Them might be great prospects for this solution if an existing roof is experiencing leaks however has actually not progressed to the factor of outright failure.
Pros- Can be exceptionally budget-friendly, particularly on roof coverings that have a great deal of estimates and roof HVAC devices. The product is pure white, which in many cases (specifically on steel roof coverings) could dramatically reduce Air Conditioning cooling costs. As this is thought about to be roof repair services rather than a brand-new roof, there are tax obligation benefits.
Cons- The existing roof needs to still be in somewhat decent problem. Some producers do not service warranty this material if there is ANY ponding water on the roof.
Bottom line- This remedy might conserve a building owner a great deal of loan, if the existing roof is in adequate condition to accept the layer. Outstanding option for steel roof coverings in particular.
As you can see, there are many different remedies to your flat roofing requirements. It is crucial however to select a roofer that will certainly recommend the very best system for your particular roof and conditions, and not the very best solution for his wallet. Make sure you understand why a roofer is advising a particular system for your task, and which system will be the best financial investment for you.
Disadvantages- Being single ply, they are at risk to discarded cigarettes, sharp things went down on the membrane, and damaged glass from containers thrown on roof (this happens a LOT) I usually prevent clients from setting up these types of systems if the roof has a lot of foot traffic or is quickly obtainable to unapproved workers. These roofing systems are so challenging in reality, that most insurance business won't also acknowledge hail damage as they do on other roof coverings (I have directly seen changed roofings absolutely pummeled with hail storm and come out totally undamaged).
Disadvantages- Field seams on these roofs are not as solid as Thermoplastic roofings. Flashings and roof edges often tend to use out much more quickly compared to the remainder of the roof. As this is considered to be roof repair services rather compared to a new roof, there are tax obligation advantages.