There are various roof systems readily available in today's market, each with different strengths and weaknesses. Listed below I will certainly describe each system briefly, then note the benefits and drawbacks.
Thermoplastic and PVC- Single ply, could be mechanically connected, fully ballasted or stuck.
Very lightweight roofs, in the area of 30lbs. An additional plus with these roofings is that huge personalized made area sheets can be gotten from the factory, decreasing seams sealed by the team on the jobsite. Immune to field, algae and ozone joints are 3-4 times more powerful than EPDM filed seams.
Disadvantages- Being single ply, they are at risk to discarded cigarettes, sharp objects dropped on the membrane, and broken glass from bottles tossed on roof (this takes place a LOT) I generally inhibit customers from mounting these sorts of systems if the roof has a lot of foot website traffic or is easily obtainable to unauthorized workers. In the past, product shrinkage went to times a serious trouble on Thermoplastic and PVC roofs, however adjustments in composition and manufacturing has ameliorated this problem. These roof coverings still shrink gradually, though not to the factor of failure as in the past.
Bottom line- Great roofs, especially on roofings that pond water greatly, as long as the roof is generally easily accessible only to licensed personnel.
Asphalt Modified Bitumen- This roof is what a great deal of people call a rubber roof, when it is in reality made up mostly of asphalt. It comes in 3 ft. vast rolls and is usually torched with an open flame, though they could be applied with warm air welders in specific conditions also.
Pros- In my point of view, the biggest strength of these roofings is exactly how well they stand up to outside anxieties. They take care of foot website traffic far better than other membrane, and are tough to pierce, especially if they have a granulated surface. These roofing systems are so challenging actually, that the majority of insurance provider won't also recognize hail damages as they do on other roofings (I have directly seen modified roof coverings absolutely pounded with hail and appear completely intact).
Cons- The most obvious downside with these systems is that there is a seam every 3 feet, which makes for a LOT of joints. If you have a persistent staff with an experienced foreman who will certainly guarantee that every joint on the roof is triple examined, you'll most likely be great with this system.
Bottom line- With an excellent, skilled staff this can be an excellent 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 most likely the only means to go.
Foam roofing systems- This system is used with a large spray system, spraying 2 liquid elements (isocyanate and resin) When the fluids are mixed with each other, they expand 20-30 times and will certainly comply with concrete, wood, steel and most present roof systems, yet inning accordance with the suppliers, NOT to changed bitumen.
Pros- When complete, the roof is monolithic without any joints, totally stuck and has website shielding residential properties.
Cons- Full disclosure, I have actually restricted experience with these roofs right here in NE Illinois. We do not mount them, yet I have gotten on 9-10 structures with this system, and all of them leaked terribly, in a number of instances within months of being installed. Leaks are really tough to find and challenging to take care of also when located, as fixing products do not adhere to this surface area effectively.
Profits- Based on my admittedly minimal experience with this system, I would certainly not suggest my clients to go this course when a brand-new roof is needed.
EPDM Rubber- Rubber roof coverings can be fully adhered, mechanically evaluated or secured down with ballast (Riverbed crushed rock or pavers) They are functional, proper for numerous setups and have a lengthy record.
Pros- Rubber roofs are relatively low-cost, simple to repair and install. They are offered in big sheets to decrease the variety of area seams, and there is fairly little flexibility in the membrane.
Disadvantages- Field seams on these roofs are not as solid as Thermoplastic roofing systems. Flashings and roof edges tend to break quicker than the remainder of the roof. Contraction over extended periods could be significant in some applications.
Bottom line- Can be a great financial investment for a structure owner, yet all of the situations of a provided setup needs to be very carefully considered. And great craftsmanship on the set up is crucial.
Spray used roofing- These are not practically re-roofs, they are thought about finishes. Some business refer to them as "re-plys", as you are basically including a ply to the existing roof surface. There are numerous manufacturers supplying various items with different compositions and spec, as well countless to go into completely here. If an existing roof is experiencing leakages but has actually not progressed to the factor of outright failure, them might excel prospects for this solution.
Pros- Can be exceptionally cost effective, especially on roof coverings that have a great deal of projections and rooftop HVAC units. The material is pure white, which in many cases (especially on metal roofings) could significantly minimize Air Conditioning cooling expenses. As this is considered to be roof repairs instead of a new roof, there are tax advantages also.
Cons- The existing roof should still be in somewhat decent condition. Your cash will basically be wasted if used to a roof that has actually already failed. Also, since this product is splashed on, any type of cars within 100 feet or so have to be moved throughout the application procedure, as this material will certainly be exceptionally challenging if not difficult to eliminate from a car's coating. Some producers do not warranty this material if there is ANY ponding water on the roof. Can not be related to a roof with an existing crushed rock ballast.
Bottom line- This option may save a building proprietor a great deal of money, if the existing roof is in adequate problem to accept the finish. Excellent option for steel roof coverings in particular.
As you can see, there are various solutions to your flat roofing needs. It is vital nonetheless to pick a roofer that will suggest the best system for your specific roof and conditions, and not the best solution for his wallet. Be sure you recognize why a roofer is advising a specific system for your task, and which system will be the best investment for you.
Disadvantages- Being solitary ply, they are at risk to discarded cigarettes, sharp items went down on the membrane, and busted glass from containers tossed on roof (this takes place a LOT) I usually prevent consumers from mounting these kinds of systems if the roof has a whole lot of foot web traffic or is easily available to unauthorized employees. These roofing systems are so challenging in truth, that a lot of insurance coverage companies will not even recognize hail storm damages as they do on other roofs (I have actually personally seen changed roofings absolutely mauled with hail and come out entirely undamaged).
Disadvantages- Field seams on these roofing systems are not as solid as Thermoplastic roofings. Flashings and roof edges often tend to use out extra quickly compared to the rest of the roof. As this is taken into consideration to be roof fixings rather than a brand-new roof, there are tax benefits.