There are various roof systems offered in today's market, each with numerous strengths and weak points. Below I will define each system briefly, and after that list the advantages and disadvantages.
Thermoplastic and PVC- Single ply, could be mechanically attached, completely stuck or ballasted.
Really light-weight roofing systems, in the community of 30lbs. One more plus with these roofing systems is that large custom made area sheets could be bought from the factory, reducing seams secured by the team on the jobsite. Resistant to algae, field and ozone joints are 3-4 times stronger compared to EPDM filed seams.
Disadvantages- Being single ply, they are susceptible to thrown out cigarettes, sharp objects went down on the membrane layer, and broken glass from containers tossed on roof (this happens a LOT) I typically prevent consumers from mounting these sorts of systems if the roof has a great deal of foot web traffic or is easily available to unauthorized employees. In the past, product contraction was at times an extreme issue on Thermoplastic and PVC roofings, however adjustments in structure and manufacturing has actually relieved this concern. These roof coverings still diminish with time, though not to the point of failing as in the past.
Bottom line- Great roofings, specifically on roof coverings that pond water heavily, as long as the roof is usually available just to accredited personnel.
Asphalt Modified Bitumen- This roof is just what a lot of individuals call a rubber roof, when it is in truth made up mainly of asphalt. It is available in 3 ft. wide rolls and is usually torched with an open flame, though they could be used with warm air welders in specific problems also.
Pros- In my viewpoint, the largest strength of these roofings is just how well they stand up to outside anxieties. They handle foot traffic far better compared to other membrane, and are challenging to pierce, especially if they have a granulated surface area. These roofs are so difficult as a matter of fact, that most insurance provider won't even recognize hail storm damage as they do on other roofing systems (I have directly seen modified roofs definitely pummeled with hail storm and come out totally intact).
Disadvantages- The most glaring negative aspect with these systems is that there is a seam every 3 feet, which makes for a LOT of seams. If you have a diligent team with a skilled supervisor who will certainly guarantee that every joint on the roof is triple inspected, you'll probably be fine with this system.
Profits- With a great, seasoned staff this can be an excellent roof on a building that does not pond water exceedingly. And if you have a structure with a lot of roof foot web traffic, this is probably the only method to go.
Foam roofs- This system is applied with a big spray unit, splashing 2 liquid parts (isocyanate and resin) When the liquids are mixed with each other, they increase 20-30 times and will abide by concrete, wood, steel and most present roof systems, yet according to the makers, NOT to changed bitumen.
Pros- When complete, the roof is monolithic without any seams, completely stuck and has shielding buildings.
Cons- Full disclosure, I have limited experience with these roofing systems below in NE Illinois. We do not mount them, but I have been on 9-10 buildings with this system, and all of them dripped terribly, in a few situations within months of being mounted. Leakages are extremely hard to locate and hard to fix even when found, as repair work materials don't stick to this surface effectively.
Bottom line- Based on my admittedly limited experience with this system, I would not recommend my clients to go this route when a new roof is required.
EPDM Rubber- Rubber roofings can be completely adhered, mechanically considered or secured down with ballast (Riverbed gravel or pavers) They are versatile, ideal for several setups and have a long track record.
Pros- Rubber roofs are reasonably cost-effective, very easy to fix and set up. They are available in huge sheets to lessen the number of area seams, and there is quite little versatility in the membrane.
Disadvantages- Field seams on these roofs are not as solid as Thermoplastic roofing systems. Flashings and roof sides tend to wear out faster than the rest of the roof. Shrinkage over extended periods can be significant in some applications.
Bottom line- Can be an excellent investment for a structure owner, however all of the scenarios of a given installment should be meticulously evaluated. And excellent workmanship on the set up is crucial.
Some business 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 leakages yet has actually not progressed to the factor of straight-out failure, them might be great candidates for this option.
Pros- Can be exceptionally affordable, particularly on roofing systems that have a great deal of estimates and roof HVAC systems. The material is pure white, which sometimes (particularly on steel roofs) can considerably lower AC air conditioning prices. As this is taken into consideration to be roof repair services rather than a brand-new roof, there are tax obligation advantages.
Cons- The existing roof must still remain in somewhat good problem. If related to a roof that has actually already fallen short, your cash will generally be squandered. Because this product is sprayed on, any kind of cars within 100 ft or so have to be moved throughout the application process, as this material will certainly be incredibly hard if not impossible to get rid of from a car's finish. Some suppliers 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.
Profits- This service might conserve a structure owner a lot of loan, if the existing roof remains in good enough condition to approve the coating. Outstanding remedy for steel roofs particularly.
As you could see, there are several remedies to your flat roofing needs. It is crucial nevertheless to pick a roofer that will certainly advise the best system for your particular roof and situations, and not the best option for his budget. Make certain you recognize why more info a roofer is recommending a particular system for your project, and which system will be the best investment for you.
Disadvantages- Being solitary ply, they are susceptible to discarded cigarettes, sharp things went down on the membrane layer, and damaged glass from containers thrown on roof (this takes place a LOT) I generally prevent customers from installing these types of systems if the roof has a great deal of foot traffic or is quickly obtainable to unauthorized employees. These roofings are so challenging in truth, that most insurance firms won't also identify hail storm damages as they do on other roofs (I have actually personally seen modified roofs definitely pounded with hail and come out entirely undamaged).
Disadvantages- Field joints on these roofing systems are not as solid as Thermoplastic roofings. Flashings and roof edges often tend to use out more promptly than the rest of the roof. As this is taken into consideration to be roof repair work instead than a brand-new roof, there are tax benefits.