There are many different roof systems available in today's market, each with numerous strengths and weaknesses. Listed below I will certainly describe each system briefly, and afterwards list the benefits and drawbacks.
Thermoplastic and PVC- Single ply, can be mechanically attached, completely ballasted or adhered.
Very lightweight roofs, in the neighborhood of 30lbs. One more plus with these roofings is that large customized made field sheets can be gotten from the factory, reducing joints sealed by the crew on the jobsite. Immune to area, ozone and algae 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 damaged glass from bottles tossed on roof (this occurs a LOT) I typically prevent clients from installing these sorts of systems if the roof has a lot of foot traffic or is conveniently available to unapproved workers. In the past, material shrinking was at times a severe problem on Thermoplastic and PVC roof coverings, however adjustments in structure and manufacturing has alleviated this concern. These roof coverings still diminish over time, though not to the point of failure as in the past.
Profits- Great roofing systems, specifically on roofings that pond water heavily, as long as the roof is normally available just to authorized workers.
Asphalt Modified Bitumen- This roof is just what a lot of individuals call a rubber roof, when it is in reality composed generally of asphalt. It comes in 3 ft. broad rolls and is generally torched down with an open fire, though they can be applied with hot air welders in certain problems also.
Pros- In my point of view, the greatest strength of these roofs is exactly how well they take on outdoors stresses. They deal with foot website traffic much better compared to any other membrane, and are tough to puncture, particularly if they have a granulated surface. These roofs are so tough in fact, that a lot of insurance provider will not also identify hail storm damage as they do on various other roofing systems (I have actually personally seen modified roofings absolutely pummeled with hail storm and appear entirely undamaged).
Disadvantages- The most glaring negative aspect with these systems is that there is a seam every three feet, which makes for a LOT of joints. If you have a persistent crew with an experienced supervisor who will certainly ensure that every seam on the roof is triple inspected, you'll possibly be fine with this system.
Profits- With a good, seasoned crew this could be a great roof on a building that does not pond water excessively. And if you have a structure with a lot of roof foot traffic, this is possibly the only way to go.
Foam roofings- This system is applied with a huge spray unit, spraying 2 fluid components (isocyanate and resin) When the fluids are blended with each other, they broaden 20-30 times and will certainly follow concrete, timber, steel and most present roof systems, but according to the suppliers, NOT to modified bitumen.
Pros- When total, the roof is monolithic without joints, fully adhered and has protecting homes.
Disadvantages- Full disclosure, I have actually restricted experience with these roofs right here in NE Illinois. We do not install them, but I have actually been on 9-10 buildings with this system, and all of them dripped severely, in a number of instances within months of being mounted. Leakages are very difficult to track down and challenging to take care of even when discovered, as fixing materials do not adhere to this surface effectively.
Bottom line- Based on my undoubtedly restricted experience with this system, I would certainly not recommend my clients to go this route when a new roof is required.
EPDM Rubber- Rubber roof coverings could be totally adhered, mechanically evaluated or secured with ballast (Riverbed crushed rock or pavers) They are flexible, proper for many setups and have a lengthy record.
Pros- Rubber roof coverings are relatively affordable, simple to fix and set up. They are available in huge sheets to decrease the variety of field joints, and there is rather bit of adaptability in the membrane layer.
Cons- Field joints on these roofing systems are not as strong as Thermoplastic roof coverings. Flashings and roof edges have the tendency to wear more quickly compared to the remainder of the roof. Contraction over extended periods can be remarkable in some applications.
Profits- Can be a great investment for a structure proprietor, but every one of the situations of an offered setup has to be very carefully weighed. And great workmanship on the set up is vital.
Some firms refer to them as "re-plys", as specialised flat roof replacement you are basically including a ply to the existing roof surface area. If an existing roof is experiencing leakages yet has actually not progressed to the point of outright failure, them might be great prospects for this remedy.
Pros- Can be exceptionally economical, specifically 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 roofings) could substantially lower Air Conditioner air conditioning prices. As this is taken into consideration to be roof fixings instead than a new roof, there are tax benefits.
Disadvantages- The existing roof needs to still be in rather suitable problem. If put on a roof that has currently stopped working, your money will basically be thrown away. Likewise, since this product is sprayed on, any cars within 100 feet or so have to be moved throughout the application process, as this product will certainly be extremely hard if not difficult to eliminate from a car's surface. Some suppliers do not warranty this product if there is ANY ponding water on the roof. Could not be put on a roof with an existing crushed rock ballast.
Profits- This remedy may conserve a structure owner a lot of cash, if the existing roof remains in sufficient problem to accept the finishing. Superb option for steel roofs specifically.
As you can see, there are several services to your flat roofing needs. It is essential nevertheless to choose a roofer who will certainly advise the best system for your specific roof and scenarios, and not the most effective remedy for his wallet. Be sure you comprehend why a roofer is suggesting a certain system for your task, and which system will certainly be the very best investment for you.
Cons- Being single ply, they are at risk to disposed of cigarettes, sharp things dropped on the membrane, and broken glass from bottles thrown on roof (this happens a LOT) I generally discourage clients from mounting these kinds of systems if the roof has a whole lot of foot website traffic or is easily available to unauthorized personnel. These roofing systems are so challenging in reality, that a lot of insurance coverage business won't even recognize hail storm damages as they do on other roofing systems (I have personally seen modified roof coverings definitely pounded with hail and come out entirely intact).
Cons- Field joints on these roofs are not as solid as Thermoplastic roofings. Flashings and roof sides tend to put on out a lot more rapidly compared to the remainder of the roof. As this is taken into consideration to be roof repair services instead compared to a new roof, there are tax advantages.