Protect, insulate and add value to your buildings
The building envelope plays a crucial role in a building’s energy performance, appearance and durability. At Gilca, we offer comprehensive expertise in masonry repair, exterior cladding, roofing, flashing, doors, windows and caulking. Our rigorous, integrated approach ensures protection against weathering, infiltration and heat loss, while maintaining structural integrity and aesthetics.
OUR SERVICES Building envelope
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Masonry repairs
Protect the structure of your building by remedying cracks, worn joints or damaged bricks with durable, aesthetic solutions.
Exterior cladding
Optimize the protection and style of your building with modern, high-performance, weather-resistant coatings.
Roofing and flashings
A well-maintained roof is the first line of defense against seepage. We install and repair roofs, flashings and drainage systems.
Doors, windows and caulking
Improve the airtightness and energy efficiency of your buildings with properly installed openings and precision caulking.
Masonry
Masonry repairs
- Brick and stone repointing
- Replacing cracked bricks
- Wall crack repair
- Lintel stabilization
- Protective sealant
Masonry, whether brick, stone or block, is exposed to ground movements, temperature changes and humidity. These factors cause cracks, detachment of materials and degradation of joints. At Gilca, we work to restore the appearance and structural integrity of exterior walls.
Our services include repointing, replacing damaged bricks, repairing lintels and applying protective sealants. We respect the original architectural style and choose compatible materials to ensure a uniform, long-lasting finish.
Well-maintained masonry not only prevents water infiltration – it also prolongs the useful life of the building while preserving its value on the real estate market.

Need to bring your
building up to standard?
Our specialists are ready to assess the condition of your exterior envelope and propose concrete, sustainable solutions adapted to your reality.
Request a quote today.

Coating
Exterior cladding
- Installation of durable siding
- Replacing worn coatings
- Insulation under exterior cladding
- Advice on suitable materials
- Aesthetic finish
Exterior cladding acts as the first barrier against the elements. It must be resistant, aesthetic and high-performance. Gilca installs and repairs different types of cladding: steel, fiber cement, vinyl, wood, architectural panels, etc., to meet the varied requirements of commercial, industrial and residential projects.
We’ll help you choose the material best suited to your needs: fire resistance, thermal insulation, ease of maintenance or a contemporary look. Our teams ensure precise installation and an impeccable finish.
The right cladding not only improves a building’s durability, but also its energy performance and visual appearance. It plays a key role in protecting the building envelope.
Roof
Roofing and flashings
- Flat roof repair
- Replacing defective flashings
- Preventive roof maintenance
- Roof drain installation
- Emergency leak repairs
The roof is the element most exposed to the elements. A failure in the roofing or flashings can quickly lead to costly water infiltration. Gilca installs, maintains and repairs flat and pitched roofs, elastomeric membranes, shingles, metal flashings and drainage systems.
We evaluate each project according to the constraints of the building and its environment (industrial, commercial or residential zone). Our work is carried out in compliance with standards, using durable materials adapted to the Quebec climate.
Flashings, often overlooked, ensure a watertight seal between the various components (walls, chimneys, windows). Proper installation is essential to prevent water infiltration and preserve the structure.

Planning a project?
Let's discuss it!
Whether you’re at the beginning of a renovation, preventive maintenance or new construction project, our team is there to support you every step of the way.
Contact us to discuss your needs and obtain a personalized intervention plan.

Doors & Windows
Doors, windows and caulking
- Replacing high-performance windows
- Exterior door installation
- Silicone or urethane caulking
- Air and watertightness
- Reducing energy losses
Doors and windows play a dual role: they ensure safety and contribute to the building’s energy efficiency. At Gilca, we install and replace openings, taking into account aesthetics, thermal performance and ventilation or safety requirements.
We also offer professional silicone and polyurethane caulking services to suit every surface. Good caulking keeps out air, water, dust and insects, while reducing energy losses.
Replacing your doors, windows and re-caulking contributes directly to occupant comfort, lower energy costs and the long-term preservation of your building.