Underlay used beneath wood shingles shall be breather type. 15 plain or perforated asphalt-saturated felt. This is a BIG RED FLAG.Ħ) UNDERLAY BENEATH SHINGLES – When underlay is used beneath shingles, it shall be (a) asphalt-saturated sheathing paper weighing not less than 0.195 kg/m2, or No. 15 felt paper for 3’ and a bare deck to the peak. Many contractors will recommend standard No. THIS IS THE MOST OVERLOOKED DETAIL IN ROOFING QUOTATIONS! Even some of the most “reputable” contractors in Windsor Essex will tell their customers this is not required to save costs and keep their price attractive. 15 asphalt-saturated felt laid in two plies lapped 480 mm and cemented together with lap cement or self-sealing composite membranes consisting of modified bituminous coated material. Eave protection shall be laid beneath the starter strip and shall consist of, No. Eave protection is not required over unheated garages, carports and porches, where the roof overhang exceeds 900 mm (36 in) measured along the roof slope from the edge of the roof to the inner face of the exterior wall, on roofs with slopes of 1 in 1.5 (8/12) or greater. This is another area that is often overlooked by contractors and can lead to problems if not addressed.ĥ) EAVE PROTECTION – Eave protection shall be provided on shingle, shake or tile roofs, extending from the edge of the roof a minimum of 900 mm (36 in) up the roof slope to a line not less than 300 mm (12 in) inside the inner face of the exterior wall. However, you can use a flashing that is 12” tall and runs 12” up the slope for a 6 foot wide chimney.
Roof pitch ontario building code install#
Translation: If you have a chimney more than 2’5” wide where a roof slope directs water towards the back side, it is recommended you install a saddle to direct water around the chimney. A chimney saddle need not be installed if the intersection between the chimney and roof is protected by sheet metal flashing that extends up the chimney to a height equal to at least one-sixth the width of the chimney, but not less than 150 mm (5.9 in), and up the roof slope to a point equal in height to the flashing on the chimney, but not less than 1.5 times the shingle exposure. This is a critical element to a roofing system and a problem area if not installed properly.Ĥ) CHIMNEY SADDLE – Chimney saddles shall be installed where the upper side of a chimney on a sloping roof is more than 750 mm (29.5 in) wide. Often times contractors will quote to re-use existing flashings or omit flashings altogether. Translation: In closed style valleys, where shingles overlap and metal is not used, an ice and water shield or leak barrier membrane must be applied to the deck prior to shingling.ģ) WALLS - The intersection of shingle roofs and masonry walls (and walls clad with other than masonry) or chimneys shall be protected with flashing.
Hopefully a roofing contractor never makes a mistake with nails.Ģ) VALLEY - Closed valley flashing shall consist of sheet metal, self sealing composite membranes consisting of polyethylene and bituminous material or one layer of either Type S smooth surface roll roofing or Type M mineral surface roll roofing (mineral surface down) not less than 600 mm wide, and nails shall not penetrate the flashing within 75 mm of its edge or 124 mm of the bottom of the valley centerline. Nails shall have sufficient length to penetrate through or 12 mm into roof sheathing. Highlights of the Ontario Building Codeġ) NAILS - Nails used for roofing shall be corrosion-resistant roofing or shingle nails conforming to CSA B111, “Wire Nails, Spikes and Staples”. Here we break down the differences between the two and help you understand what’s required and what’s recommended.
Roof pitch ontario building code code#
At Dayus Roofing we always recommend to install a roofing system that adheres to both the Ontario Building Code as well as all shingle manufacturers’ recommendations. Specifications can vary, “professional” recommendations can be completely different and deciding between right and wrong can be overwhelming. Manufacturers RecommendationsĬhoosing a roofing contractor can be a very confusing process.