Roof Waterproofing
Spray applied waterproofing systems are fast becoming the most acceptable method of roof waterproofing, providing a water tight covering that is long lasting.
MacLennan use hand-applied systems for roof waterproofing projects that, when installed by us, are covered under our 10 year guarantee. We offer more than other waterproofing and roofing contractors.
What are the benefits?
- Design, supply and installation of membranes for roof waterproofing. No split responsibility
- We take full responsibility for roof waterproofing projects.
- Accept design liability on our PI (unlike any manufacturer).
- Give insurance backed guarantees of up to 30 years.
- Provide an insurance backed products guarantee.
- Ensure compliance with all relevant standards.
- Take on any size project from tiny garage roofs to massive green roofs or even a large commercial building.
- Comply with all relevant health and safety requirements.
- We do not use sub- contractors for specialist work. Only our own fully trained staff.
- We are recommended, trusted and endorsed by the foremost market-leading architects, engineers and building contractors.
- We always accommodate project time constraints.
- Are very competitive on price.
Get in touch with our technical team today!
Why does flat roofing so often leak?
Flat roofs and green roofs fail because they are waterproofed with single ply roofing membranes which have seams and are not correctly bonded. Rather than a single play membrane the roof may use asphalt which is heavy, becomes brittle and does not accommodate fractional movement. Other common problems found within failed roof waterproofing attempts include the detailing found around drains, services, plant and movement joints.
The key to roof waterproofing, and more importantly waterproofing of flat roofs, is that the system has to be seamless, fully bonded, dry in seconds and resistant to both impact and abrasion. Polyprufe (polyurea) coatings combine extreme application properties such as rapid cure (even at temperatures well below 0°C) and insensitivity to humidity.
Polyprufe coatings have exceptional physical properties such as impact resistance, flexibility, tear strength, tensile strength, chemical and water resistance. The result is excellent long-term weathering and abrasion resistance, with a very competitively priced service because of its quick installation.
The system used when waterproofing roofs uses 100 percent-solids, so no solvents, no emissions and no VOC, hence an environmentally friendly coating. Due to its exceptional properties, the Polyurea spray coatings are used extensively internationally for waterproofing, corrosion protection, containment, membranes, linings to tanks and structures, protection of concrete joins and structures.
Many major green roof contractors use hot-melt systems which involve hot works, and are at best an old technology with many documented problems. Through development of modern roof waterpoofing techniques, sprayed polyprufe and polyurethane coatings overcome the problems that hot-melt systems suffer from. Polyprufe and polyurethane are both extremely flexible, fully bonded and seamless.
The polyprufe system is also virtually indestructible and durable as a finish, providing long term solutions. These systems have crack bridging properties like no other systems and can be easily detailed for movement joins. Some major waterproofing suppliers have changed their well known deck and roof waterproofing systems in favour of the sprayed coatings commonly installed by MacLennan.
How do we ensure our roof waterproofing will not suffer a leak?
The finished work is tested by electrical spark testing as part of the MacLennan quality assurance process before providing long-term guarantees.
Why should I work with MacLennan?
WE’RE INDEPENDANT
We Design, supply and install. There's no split responsibility with MacLennan.
WE’RE PASSIONATE
MacLennan live and breathe waterproofing, have a look at one of our free CPD seminars and find out!
WE’RE GUARANTEED
MacLennan has the most comprehensive guarantees and insurances in the industry.
What else do you need to think about when waterproofing a basement?
