Tips for your flat roof : FAQ


LK Roofing offers various warranty packages that include labour and material. There are also several other warranty options available through manufacturers and the AMCQ. The base warranty offered by all roofing contractors for improvement work or new roofing work covers a period of five (5) years from the “work completion” date.

Ask your representative.

Yes, as of the first year of your system. By doing so, you will honor your warranty and extend the life of the membrane. Preventive maintenance can help monitor problem areas and deterioration that can damage your roof over time. Based on the inspection, you will know whether your roof requires major or minor maintenance work. Ask about our preventive maintenance plan. Our technicians are trained to assess your needs and those of your building. Call us today at 450-437-4118

The roof inspection is a process that provides information on the status of your system. The membrane, metal flashing, and roofing accessories are the most important items to check. The inspection helps identify the needs of your roof as well as your budgetary planning needs. In order to be able to honor your warranty, the Association des Maîtres Couvreurs du Québec (AMCQ) recommends that you have your roof inspected twice a year, in spring and fall.

Roof repairs are carried out before re-roofing; maintenance allows you to extend the life of your roof. Re-roofing is required when repairs can no longer protect the roof against water infiltration. It consists in partially or completely replacing components, up to the decking. As such, it’s important that you contact LK Roofing before making any re-roofing decision. Only a professional can perform a comprehensive assessment of your building and come up with the best solution for your needs.

Yes, we have several service units available to serve you 24/7. Before you contact us, be sure you are safe (look out for shock hazards) and make sure that the water infiltration is truly coming from the roof. Track the leakage, water always leaves a trail. Remember, rings, mold, or ballooning on the ceiling are signs that water may be leaking from your roof. 

Contact us now to avoid the damage that infiltration can cause: 514-792-7345

“How much does a roof cost?”, that’s the million-dollar question! Actually, the price of a flat roof is relative; a myriad of factors are considered in establishing the price of a flat roof. There is no predetermined price for “X” square feet of roof. Roof size, access to the roof—is a crane required, for instance—the building’s needs, the type of system, quantity of accessories on the roof, action required—new roof or re-roofing, full or partial re-roofing—are all factors that need to be taken into consideration. As you can see, it’s impossible to set a predetermined price. However, we must take the time to meet with you, answer your questions, and assess your specific needs. Therefore, it is impossible to set a predetermined price without first determining the waterproofing system. As such, we are unfortunately unable to tell you “how much does a roof cost?” However, it is very likely that there will be a price to pay if you haven’t established a preventive maintenance plan over time after the first year of your membrane because your roof is likely to have been neglected.

Municipal by-laws are increasingly governing the roof color used when replacing a roof or installing a new one. By-laws require that building owners use a white membrane due to its ability to reduce heat islands—i.e. they reduce ambient temperature in urban areas. As such, households benefit from reduced energy costs during the summer. It should be noted that a white finish can be applied to any membrane. Let an expert from LK Roofing weigh the pros and cons of each membrane, and tell you which one is best suited for your building and your budget.

Yes, without a doubt. The system’s operation is simply inverted, which means that the decking is waterproofed, and the membrane insulated. This technique aims to protect the waterproofing membrane against exposure to ultraviolet rays and climate change. There are many benefits to an inverted roof, including saving a considerable amount of money on installation and materials. However, inverted roofs also come with cons, such as more strenuous repairs owing to the fact that we need to remove everything to have access to the membrane, because the latter is found below every other material protecting the system. Before making any decisions, consult an expert from LK Roofing.

It is recommended to remove snow from the roof when there are more than 60 centimetres (23 inches) of hard snow on your roof, or to de-ice the roof when there are more than 17 centimetres (6 inches) of ice. Also, proper knowledge and the appropriate techniques are required to perform these tasks to avoid damaging the membrane. As such, it’s important to keep 7 to 8 centimetres of ice (3 to 4 inches) on the roof, so the thin layer can protect the system’s membrane. A roof inspection—before clearing the snow—will be all the more a wise decision as snow density plays a major role in the technique used. A heavy accumulation of ice on the roof may pose a risk of collapse and threaten the people circulating near the building. Safety is a priority for LK Roofing; you can trust us with your roof. 

LK Roofing is an accredited member of the Association des Maîtres Couvreurs du Québec (AMCQ)

LK Roofing is Contractor Check, ComplyWork accredited, and prequalified for Elite Bronze and EliteManagementSST.

We have liability insurance for $2,000,000.

We are also affiliated with the prevention mutual, GESTESS, ensuring worksite health and safety.

RBQ Licence 8103-3979-07

LK Roofing specializes in commercial, industrial, institutional, and multifamily residential (flat roof) roofing. As such, we are able to perform any work on any type of waterproofing system. These include: improvements, repairs, new roof, maintenance, inspection, not to mention snow removal. We offer a 24/7 service to better serve you in case of an emergency, or even in the event of a major disaster.

The lifespan of a waterproofing system depends on the type of membrane, its installation, the level of maintenance performed on the roof, and its exposure to adverse weather conditions.

As a general rule, under a solid preventive maintenance plan, on average, membranes can last up to:

Elastomeric: More or less 25 years, depending on maintenance, exposure to adverse weather conditions, and activities on the roof.

Multi-ply (asphalt & gravel): More or less 20 years, depending on maintenance, exposure to adverse weather conditions, and activities on the roof.

Single ply (monolithic, EPDM, TPO & PVC): More or less 25 years, depending on maintenance, exposure to adverse weather conditions, and activities on the roof.

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