Emergency Leak Repairs
24-Hours Emergency Service
At Conestoga Roofing we are equipped to handle all of your roofing emergencies on a 24/7 basis. For emergency roofing repairs and service, call our 24-hour emergency line at the above numbers. Our skilled tradesmen are available to investigate or repair roof leaks.
Conestoga Roofing installs and maintains a variety of flat roofing systems for industrial and commercial buildings that inculde:Maintenance Division
Our Skilled Estimators
Our Estimators will help you make the right roofing decision.
Our Estimators make it their top priority to ensure that our customers are educated on their flat roofing needs as the investments in commercial flat roofing systems are significant. Our team of expert Estimators will gladly answer any questions you may have concerning your roofing project. Our experienced Estimators provide job-specific quotes and proposals including plans, specifications, photographs, field notes, and takeoffs to help you make the right roofing decisions. We are pleased to have an in-house Certified Specification Writer to work on special roofing projects. All of our Estimators are up-to-date on market prices and industry trends in order to remain competitive.
Our Estimators will help you make the right roofing decision. If you have more questions, please contact us and ask for:
Built Up Roofing - BUR
These roof systems are sometimes referred to as "tar and gravel roofs" (although we don't use actually use tar as it's carcinogenic) and asphalt BUR is the most common type of flat roof at this time. Conestoga Roofing is expert at installing and repairing BUR roofing systems.
BUILT-UP ROOFING SYSTEM
BUR systems generally are composed of alternating layers of bitumen and reinforcing fabrics that create a finished membrane. The number of plies in a cross-section is the number of plies on a roof: The term "four plies" denotes a four ply roof membrane construction. Sometimes, a base sheet, used as the bottom-most ply, is mechanically fastened. Built up roofs generally are considered to have fully adhered if applied directly to roof decks or insulation. The reinforcing fabrics also are called roofing felts or ply sheets.
The bitumen typically used in BUR roof systems is asphalt, coal tar or cold-applied adhesive. The asphalt or coal tar is heated in a kettle or tanker and then applied by mop or mechanical spreader. Asphalt is a petroleum product refined from crude oil; coal tar is derived from the distillation of coal. Cold-applied adhesives typically are solvent-based asphalts that don't have to be heated in a kettle or tanker. Conestoga Roofing uses an "odourless kettle" for environmental and safety reasons.
THE MOST COMMON ROOFING SYSTEM
The materials used for built-up roof systems include aggregate (such as gravel, slag or mineral granules), glass-fibre or mineral surfaced cap sheets, hot asphalt mopped over the entire surface, aluminium coatings or elastomeric coatings. Asphalt BUR is the most common type of flat roof at this time. It is made up of multiple layers of reinforcing plies and asphalt forming a redundancy of water proofing layers. The reflectivity of built-up roofs depends on the surfacing material used. Gravel is the most common and they are referred to as asphalt and gravel roofs. Asphalt degradation, however, is a growing concern. UV-rays oxidize the surface of the asphalt and produce a chalk-like residue. As plasticizers leach out of the asphalt, asphalt built-up roofs become brittle. Cracking and alligatoring follows, allowing water to penetrate the system causing blisters, cracks and leaks. Regular maintenance is required to ensure that a BUR roofing system achieves its life expectancy.
Single-ply membranes are factory-manufactured sheet membranes. They generally are categorized as either thermoset (EDPM) or thermoplastic (TPO or PVC). Thermoplastic materials can be repeatedly softened when heated and hardened when cooled. Thermoset materials solidify, or "set," irreversibly after heating. Single ply membranes commonly are referred to by their chemical acronyms, such as ethylene propylene diene monomer (EPDM).
Single-ply sheet membranes are produced using one of three manufacturing processes: calendering, extruding or spread coating. The membranes may contain reinforcement layers. Common reinforcements for single ply membranes include polyester fabrics or scrims, glass fibre, or a felt or fleece backing.
A finished sheet's thickness typically is referred to as mil thickness. Common mil thickness for these sheet membranes ranges from 30 mils to 60 mils. Single-ply membranes can be installed fully adhered, mechanically attached or held down with ballast. Most single-ply roof systems do not receive surfacing. In many instances, a combination of attachment methods is used to secure a roof system.
For instance, an insulation may be mechanically attached to the substrate with the roof membrane fully adhered to the insulation.
EPDM - Single-Ply Membrane
Ethylene Propylene Diene Monomer (EDPM) roofing is an efficient rubber roof style used on low-slope roofing surfaces. It is a synthetic rubber most commonly used in single-ply roofing because it is readily available and relatively simple to apply. It is also called Single Ply Membrane and it is one of the common types of low-slope roofing. It's been in use on roofs in Canada since the 1960’s. When properly applied, it has a life cycle of 15 to 25 years. It is great for preventing leaks and is often installed for roofs that have problems with weathering, failing joints, and inflexibility. It is relatively inexpensive as well as simple to install as compared to BUR. Compared to conventional built-up roofs, it is also much cleaner and doesn’t emit the odours and fumes that are often associated with built-up roofing systems. (Although Conestoga Roofing uses an "odourless kettle" when it comes to applying BUR.) Vulcanized EPDM is the most common type of EPDM roofing system. Non-vulcanized EPDM is typically used for flashing purposes.
THERE ARE THREE METHODS OF APPLYING EPDM
- Fully adhered EPDM uses water-based or solvent-based adhesives to adhere the EPDM rubber to the substrate.
- Mechanically fastened EPDM is attached to the substrate by manufacturer-approved mechanical methodology.
- Loose-laid membranes are secured only at the perimeters and any penetrations. A ballast of round river rock or concrete pavers is used to hold the materials in place. The river rock is usually installed at a rate of 1000 - 1200 pounds per square (100 square feet of roofing surface) and the pavers typically weigh 20-pounds per square foot. Structural integrity is of paramount importance with a loose-laid roof system. The seams are sealed using either an adhesive or a splicing tape.
Highly dependable, economically beneficial, high durability, and high efficiency makes EPDM an attractive option to any building owner looking to a commercial, industrial and institutional roofing contractor for a new roof or an upgrade to the existing roofing system. Additionally, an EPDM roof will often come with a long warranty, low maintenance requirements, low installation labour costs, and generally, garner rather easy code approvals. For regions subject to potentially catastrophic weather experiences, such as hurricanes - EPDM roofs have very high resistance, making them quite practical for those who live in those areas.
ADVANTAGES OF EPDM
EPDM roofs are highly resistant to weathering, ozone, and surface damage. It is flexible in cold weather and still has high fire and heat resistance. You can't go wrong choosing EPDM for low-slope roofs and flat roofs that need to be waterproof and durable against the harsh Canadian weather.
TPO & PVC - Single-Ply Membrane
Another example of a Single-Ply Membrane is the thermoplastic TPO or PVC roofing system. These membranes can be repeatedly softened by heating or hardened when cooled. Because of the materials' chemical nature, thermoplastic membranes typically are seamed by heat welding with hot air or solvent welding.
The most common thermoplastic roof membranes are PVC and TPO. The following provides general descriptions of these two systems.
THERMOPLASTIC OLEFIN (TPO)
TPO membranes are produced by calendering with lamination, extrusion with lamination, or extrusion-coating techniques. TPO sheets are a blend of polypropylene and ethylene propylene polymers and usually are reinforced with polyester. TPO sheets contain colourant, flame retardants, UV absorbers and other proprietary substances to achieve desired physical properties.
- Sheet widths range from 6 feet to 12 feet wide
- Sheets are typically 40 mils to 100 mils thick
- Seams are sealed by heat welded with hot air
- TPO membranes Commonly are white or black
PVC sheets are produced by calendering, spread coating or extruding, and typically are reinforced with polyester or glass-fibre mats or scrim. PVC sheets contain plasticizers and stabilizers, as well as other additives to impart flexibility and achieve other desired physical properties. Some membranes are available with nonwoven fleece backing adhered to the underside of a sheet.
- Sheet widths range from 6 feet to 12 feet wide.
- Sheets are typically 45 mils to 90 mils thick.
- Seams are sealed by heat or chemical welding.
- PVC membranes are produced in numerous colours, though grey and white are the most common.
Polymer-modified roof membranes are composed of reinforcing fabrics that serve as carriers for the hot polymer-modified bitumen as it is manufactured into a roll material. MB roof system membranes are composed of multiple layers, much like BUR membranes. MB roof systems typically are installed as a two-ply system and almost always are fully adhered.
THERE ARE TWO TYPES OF MB ROOFING MEMBRANES
- SBS polymer-modified bitumen membranes commonly are installed in hot moppings of asphalt (similar to BUR systems) or cold adhesive. Some SBS modified membranes are self-adhering; that is, they contain an adhesive backing.
- APP polymer-modified bitumen membranes typically are heat welded or torch-applied.
Generally, APP modifiers impart a "plasticized" quality to asphalt, and SBS modifiers impart a "rubberized" quality to asphalt. MB membranes and EPDM a thermoset membrane, often are confused by consumers because of colloquialisms used by roofing contractors. MB and EPDM membranes are sometimes called "rubber roofs."
Metal Sloped Roofing
Surfacings for MB membranes include aggregate surfacing, mineral surfacing, metal foil-laminate surfacing and smooth liquid-applied surfacing.
Sloped Metal Roofing
Conestoga Roofing operates an in-house custom sheet metal fabrication shop. We are able to custom fabricate and install all commercial and industrial systems. We supply and install all metal roofing and cladding, including any custom and ornamental flashing. We custom install copper metal work, any type of metal canopy’s and we also do facelifts on existing buildings.
Conestoga Roofing has completed roofing projects which required a high degree of public safety, coordination, and protection of owner’s on-site new vehicle inventories, all in a very time sensitive schedule. With that we provide some additional comment on their performance. Business Management; both on site and in their office, Conestoga Roofing’s knowledge, business procedures, and response time continues to be excellent. Conestoga Roofing’s relationship with other sub-trades and their own forces has helped minimize construction conflicts, and improve the overall construction schedule. We have found them to be professional, fair, and responsible.
– CRD Construction Ltd.
As an independent Consultant specializing in commercial roofing, and for a period approaching twenty (20) years, our experience with Conestoga Roofing has been positive in every regard. We have found this contractor to be reliable, and in our addition, Conestoga has both experience and resources to successfully complete any size of industrial, commercial and institutional roofing projects within central mid-west Ontario.
Our experience with Conestoga Roofing goes back more than 20 years. We have found them to perform quality installations, have knowledgeable staff and provide exceptional service on the projects we have been associated with. We require Trade Contractors to meet our quality standards and tight project schedules, Conestoga Roofing has worked with us on many successful projects in the commercial, industrial and institutional areas.
– The Walterfedy Partnership
Conestoga Roofing and Sheet Metal Ltd. of Cambridge, Ontario has been an Active Member “in good standing” of the Ontario Industrial Roofing Contractors Association. As duality of membership in the OIRCA and the CRCA is obligatory for Active Members, Conestoga Roofing and Sheet Metal Ltd. is also a member “in good standing” of the Canadian Roofing Contractors’ Association.
– Ontario Industrial Roofing Contractors Association
Just letting you know how impressed I was with the crew that replaced the roof on First United Church. The crew showed us lots of pictures as they worked and explained what was being done. The job site was clean and safe.