Shingle Roofing – 5 Steps One Must Always Check in a Roof Estimate
Vancouver roofing shingles will last if the following requirements are met. A roof must be well ventilated, the nail line on the shingle must be nailed correctly and the list of other stuff listed below should sit within the average estimate you get.
First things first – get rid of your old roof. Building code in the greater Vancouver region requires the old roof to come off every time by a Vancouver roofing company. It has been proven that the new roof will not last very long after going over the old roof. Once the new roof is off, every roofing estimate should state that the deck is inspected for dry rot and extruded nails.
Some homes may have plywood in their estimate if you have shiplap or a strapping, which is from a cedar roof. Next is the underlay which is very important. In the Pacific North West most shingle manufactures will not give a warranty with a 15 pound paper underlay even though I still see so many roofs that install this product. Most products require a fabric underlay that has the ability to breath as well as not damage if it gets wet.
All flashing (metal) has to be replaced in on the roof, it is ripped off when the old roof comes off and new flashing is required so that old flashing with nail holes are not used. flashing is installed on the chimney’s, skylights, along a wall, plumbing stacks, B vent and along the gable (rake) if the roof had plywood installed.
The roof is shingled and capped with the capping either being a manufactured cap but in the Metro Vancouver the roofer is allowed to cut a regular shingle for the capping. Valleys are now covered with metal and not shingle knitted like the past. This is one of the most sensitive areas of the roof so do not go cheap here.
When shingles are installed that means a solid deck remains below it. Vancouver building code has strict requirements in regards to roof ventilation and it is crucial that the following is applied. Every roof vent is a particular size but at the end of the day you need one square foot of ventilation for every thousand square feet of living area.
If you are concerned whether the contractor has given you a adequate estimate ask for the details of the product he is offering and see whether specs correspond with your estimate
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