Protected Membrane Roofing Installation
Typical Installation
The following depicts the typical steps necessary to install Hydrotech's Monolithic Membrane 6125® waterproofing/roofing membrane assembly. This is intended to be only an illustration and must not be considered a suitable guideline governing the installation of the products. (A horizontal, poured-in-place concrete substrate application is covered in this illustration.)
1. Preparation...
The Hydrotech trained applicator would typically determine at the beginning of the day's work the size of the area they would target to complete that day. Once the area has been determined, the concrete substrate must be cleaned prior to the installation of MM6125. This will require the deck to be broom cleaned and then blown with an air compressor to remove all debris, dirt and dust.
2. Conditioner...
Hydrotech's Surface Conditioner should be spray or roller applied to the concrete surface and allowed to thoroughly dry prior to the installation of MM6125.
3. Detailing...
Detailing work is completed first. This consists of either Hydrotech's Flex Flash F or Flex Flash UN encapsulated between two layers of MM6125. The Flex Flash F is typically used to reinforce cracks and changes in plane. The Flex Flash UN is used as reinforcing at drains, expansion joints or any transitions between dissimilar construction materials. It is also used as a flashing for exposed parapets, walls and curbs in roofing installations.
4. MM6125 Field Application...
The first coat of rubberized bitumen is applied to the concrete deck in a continuous fashion and at an average thickness of 3 mm. The first coat of membrane is then completely covered with a 1000 mm wide fabric reinforcing; each joint overlapped a minimum of 50 mm. A final 3 mm thick coat of membrane is applied to cover the fabric. The average thickness of the two coats must be 5 mm, with no readings less than 4 mm.
5. Separation/Protection Course Installation...
To complete the installation of the waterproofing/roofing assembly the separation/protection course is installed, such as Hydrotech's Poly 500 or Hydroflex® 30 for waterproofing applications. This is done as the membrane is being installed so that a good bond is attained between them.
6. Leak Detection...
Hydrotech strongly recommends that the waterproofed area or roof be watertested, either by flood testing or electric conductivity testing, prior to installing the subsequent topping materials. This helps to ensure the installation is watertight before any overburden is placed.
Membrane Being Applied
Membrane Assembly and Acceptable Deck Chart
|
Substrate Type |
Standard Assembly |
Fabric Reinforced Assembly |
|
Cast in-place concrete (wood troweled finish preferred) (minimum density of 115 pcf) |
YES |
YES |
|
Composite deck (concrete over metal) |
YES |
YES |
|
Precast concrete: "T", Double "T", panel |
YES |
YES |
|
Lightweight insulating concrete or cellular concrete |
NOT RECOMMENDED |
NOT RECOMMENDED |
|
Wood Plank |
NO |
YES |
|
Plywood |
NO |
YES |
|
Metal deck with gypsum board (or other acceptable cover board) |
NO |
YES |
|
Renovation/Rehabilitation |
CONTACT HYDROTECH |
YES |