System Options: Fully Adhered System
Sure-Weld Fleeceback TPO offers an ideal solution on very complex building shapes or where drilling and mechanical fasteners are inappropriate or impractical
Install concrete deck with screed to falls and ensure the surface is free from latents and rough projections. Apply Icopal quick drying primer and allow to dry thoroughly
2. Vapour Control
Apply a layer of Icopal Heat Activated Vapour Control Layer creating a full bond to the substrate. At all upstands and penetrations the Vapour Control Layer should be dressed to form protection to the ends of the Insulation.
3. Thermal Insulation
Bond to the Vapour Control Layer Icopal Thermazone SLM Roofboard insulation board ........mm thick, laid breakbond pattern in accordance with the current fixings instructions.
4. Membrane Attachment
Verify that the surfaces to receive the Sure-Weld adhered membrane are clean, dry, smooth and free from defects. During membrane installation, inspect and correct the substrate where necessary to avoid gaps between insulation boards, uneven or step off conditions. Apply the Sure-Weld Fleeceback bonding adhesive to insulation with a medium nap roller ensuring continuous and even distribution of the adhesive, avoiding puddles. Sure-Weld Fleeceback bonding adhesive must be left open until it starts to string or stick to a dry finger touch. Do not apply adhesive to lap areas which are to be hot air welded. Roll the membrane into the wet adhesive coated substrate (once foaming or stringing has occurred) avoiding wrinkles in the sheet. Immediately roll with a weighted roller to adhesive maximum contact.
Side Lap Welding
Lap side and end joints not less than 50mm ensuring that water will drain over and not into them. Seal all side and end joints by welding. If the membrane has been exposed for more than seven days, clean and dry the joint surfaces using Sure-Weld membrane cleaner for the whole length of the lap prior to heat welding. At end laps overlap butt edges with a 150mm wide strip of Sure-Weld Reinforced membrane and hot air weld along all edges. Apply 3mm bead of edge sealant to all cut edges of membrane and all the end laps