For a low slope residential roof there are two main options.
Low pitch roof covering options.
Pitched roofs begin with with slopes greater than 3 in 12.
Residential low slope roofing can generally be divided up into two broad categories.
Suitable materials for pitched roofs.
This low pitch roof tile gives the appearance of slate without the cost or the high maintenance.
4 12 to 20 12 pitches.
Low slope metal roofs have been a preferred roof covering for commercial institutional and industrial buildings for years because of their ability to protect against the elements to allow water to drain away from the roof surface and to keep building contents and occupants dry and comfortable.
The marley thrutone slate is a perfect example of a low roof pitch option.
Many problems that arise from the installation of a low pitch roof derive from poor installation or lack of maintenance.
A minimum pitch of 3 in 12 or even 4 in 12 will normally be required.
For pitches of 2 5 12 up to 4 12 the roof requires double underlayment.
Keep in mind that neither metal shingles not corrugated metal panels are suitable options for low slope or nearly flat roofs.
Clay or cement tiles can be used on a wide range of roof pitches.
For a roof recover that is keeping the low slope structure a roofer may add tapered insulation and then a new roof covering of epdm or other roofing material.
Made of several layers of bitumen surfaces built up roofing is finished by applying an aggregate layer or coating as the top layer.
What are the challenges of a low pitch roof.
Larger flat roofed applications low slope such as residential condominium complexes row homes and town houses and smaller applications such as residential porch and garage transitions from the main home where the slope of the roof changes dramatically from steep slope to low slope on the same structure.
Then apply standard asphalt shingles over the membrane.
This top layer normally is tar over which the gravel is laid.
It s constructed of a durable reinforcing mat of non woven glass fibers that have been coated and permeated to a thickness of approximately 2 0 mm.
The membrane will outlast the shingles and seal around all nail penetrations.
1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products.
Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle.
Built up roofing is the most popular roofing material used on low sloped roofs.
