What is the difference between modified bitumen and rolled roofing?
Modified bitumen is approved for “flat” roofs with minimal slope, but roll roofing is not viable below a 2/12 pitch (two inches of rise for each twelve inches of horizontal run) with exposed nails, or a maybe little lower with concealed nail installation.
What is modified bitumen roofing made of?
Modified bitumen is one of the most common low-slope roofing systems. Not to be confused with similar materials like asphalt roll roofing, EPDM, or TPO, modified bitumen combines hot asphalt with plastic and rubber additives. They are then layered between sheets of polyester or fiberglass.
How can you tell if a roof is modified bitumen?
Try looking at the material edges: modified bitumen roofing is thicker, and its edges are sealed by heating with a torch – you should see a little runout of melted bitumen at the material seams.
What is modified bitumen used for?
Modified bitumen roofing is primarily used on flat or low-slope commercial roofs. Depending on the type and material, these membranes may be installed as part of a two-layer system or as part of a multi-ply system.
What is the life expectancy of a modified bitumen roof?
20 years
What is the life expectancy of a modified bitumen roof? Mod bit roofs last upwards of 20 years, sometimes even longer with proper maintenance and have a very long and established track record in the roofing industry.
Can modified bitumen roofing be repaired?
Luckily, when modified bitumen coating is damaged, repair is possible! There are a few different ways it can be handled, although applying a patch is the most common method.
How long will a modified bitumen roof last?
How much does it cost to install a modified bitumen roof?
Cost of Modified Bitumen Roof
| Modified Bitumen Roof costs | Zip Code | |
|---|---|---|
| Basic | Best | |
| Modified Bitumen Roof – Installation Cost | $220.00 – $240.00 | $300.00 – $340.00 |
| Modified Bitumen Roof – Total | $385.00 – $415.00 | $520.00 – $590.00 |
| Modified Bitumen Roof – Total Average Cost per square foot | $4.00 | $5.55 |
Is modified bitumen flexible?
Modified bitumen maintains a more uniform strength and flexibility over a wider range of temperatures compared to the unmodified asphalt used in built-up roofs. Modified bitumen roofing is manufactured in sheets, with layers of modified asphalt over a reinforcement fabric.
Why is bitumen used in roofing?
Bitumen has been utilised for its adhesive and waterproofing qualities for over 5,000 years, making it one of the oldest known engineering material still used today. It is particularly popular in the roofing industry, as it can create a watertight structure which is proven to stand the test of time.
How do you maintain a modified bitumen roof?
If moisture is present, open the membrane and inspect the insulation and deck for damage. Remove the wet or damaged insulation and repair or replace the deck as required. Properly attach new, dry insulation consistent with the thickness of the existing insulation and compatible with the other roof system components.
What lasts longer EPDM or bitumen?
Life expectancy – in the majority of cases, the life expectancy of a roof will boil down to the skill of the contractor chosen to install it. EPDM has a life expectancy of 50 years, comparing incredibly well to its bitumen felt competitors.