FlexiStop Roof Coating
Keep it simple: why drag needless pain into a project?
Sometimes the amount of planning and preparation required for a party takes all the joy out of the party itself: it's difficult to partake in the celebrations when you're a hair's breadth away from a nervous breakdown brought on by exhaustion. Business can be like that, too!
In the roof pictured (below), a small leak in the gutter is one of three issues causing the roof to leak. The preformed membrane has been perforated in a number of places and needs to be replaced or recovered. The membrane around a number of small ventilation units is torn. Either torch-on bituminous felt or another layer of the uPVC membrane needs to be brought onto the roof, cut into shape (tailored,as it were) and heat welded into place.
Also, the outlet from the rooftop water tank is leaking and the weight of the tank itself is threatening the integrity of the membrane it is resting on. This is going to require a lot of work to get right! Rolls of felt or pre-formed membrane. Torches, gas-tanks, the lot. Still, roofers are used to such inconvenience. So they don't mind...
But the business owner does mind! The pictures are of a flat roof extension to the rear of an old, city-centre building. The only way to get large rolls of materials and equipment onto the roof is over the front slated hip roof of the original building, THREE FLOORS ABOVE STREET LEVEL, down the slope on the rear, and on to the flat surface where work can then begin.
This will require a scaffold to be erected on the busy city pavement, enclosing a series of ladders which will allow men and equipment to be brought to the third floor roof and over. Health and Safety issues regarding pedestrians forced by scaffolding onto the roadway must be addressed. The cost of all this has the owner scratching a head that, after seven years of global recession, is already well scratched. He is thinking, "I really don't need this. That bucket collecting water, sitting in the middle of the office floor, is not really such an inconvenience. And we can live with that yellow stain on the wall for another year or two. Or three..."
So the roof continues to leak water and the roofer looks for work elsewhere...
But wait! A small skylight in a top floor store-room allows limited, restricted access to the flat roof. The size of the gas tank is a no-go. What to do?
Three 5 Litre cans of FlexiStop, a couple of paint brushes and a 4" roller pose no access problems, and from start to finish the job is done in nine hours.
After the surface had been cleaned and dried, FlexiStop Liquid Silicone was brushed straight from the can on to the affected areas: along the horizontal, up the slope; around, and up on to the ventilation shafts. Two new outlet pipes are fitted into the gulley and sealed with FlexiStop. When fully cured, two hours later, the FlexiStop has completely adhered to, and bonded with, all the different surfaces, forming a single, seamless waterproof membrane.
The leaking water outlet has been sealed with a coat of FlexiStop, as has the joint between two sheets of uPVC membrane which were beginning to part company and would have begun to allow water seep through to the office below in a very short time (another bucket on the office floor).
The job was done by one operative in about the time it would have taken at least two men to erect and remove the scaffolding alone, with no disruption to the workers in the offices beneath or inconvenience to pedestrians in the street.
Best of all, the work is guaranteed for 35 years!
One of the main problems with flat roofs is their tendency to leak, particularly if the roof is old or badly maintained.
This can lead to expensive damage to the structure beneath it as a result of the rot which often develops and can prove to be unsightly for the occupants of the building. In addition, once the underlying roof timbers are soaked, sagging often occurs and the problem worsens.
A simple application of FlexiStop will form a durable and tough waterproof barrier, protecting the roof and the structure beneath it from harsh weather conditions.
Gullies and gutters, if not properly installed or left to deteriorate can cause huge problems. Often a gulley or gutter that looks beyond repair can be made good as new with FlexiStop at a fraction of the cost of replacement. Check it out before making any hasty decisions...
FlexiStop™ is a liquid coating system. It can be used with a non woven needled polyester fleece reinforcing membrane within it. When applied the system cures to form a tightly adherent, seamless permanently elastic waterproof skin, following the most complicated and irregular surface contours.
Upstands such as rooflights, ventilation shafts, parapets and air-conditioning units can be simply encapsulated in the entire roof membrane in a fraction of the time needed for the "cutting and tailoring" needed to fix preformed membranes into place. And time, it needn't be stressed, is money.
The “in service” working temperature range is -60°C to +200°C. It is thermally stable throughout this range, retaining all of its properties 100%. Almost all waterproofing membranes expand at high temperatures and contract at low temperatures, eventually leading to failure, FlexiStop remains persistently pliable and supple. FlexiStop™ has excellent UV resistance properties and is basically unaffected by the Ultra Violet light of the Sun.
FlexiStop™ has excellent resistance to dilute acid and alkalis. It is ideal in densely populated or industrial areas where the air can be heavily contaminated. FlexiStop™ is 10 times more vapour permeable than most other high tech membranes and 100 times more than bitumen based products. Yet FlexiStop™ is fully water repellent, non- hygroscopic and will not support fungal growth. FlexiStop has amazingly high fatigue resistance. It can be bent and twisted a multitude of times without failure - see the repaired bellows in the "Rolling Stock" section and imagine the stress applied to the FlexStop repair thousands and thousands of times on each and every train journey. FlexiStop can stand up to this treatment!
The surface spread of flames is not an issue with FlexiStop™ as it will not support combustion unlike bitumen based materials. It will burn when subject to intense heat, but will cease burning when the heat is removed. When tested inaccordance with BS 476: Part 3 1958 achieved the designation of EXT.F.AB.
Whilst FlexiStop™ will adhere to virtually all known substrates, the quality of the substrate will not affect the system. It is very strong and its strength is independent of the substrate. FlexiStop™ has extremely high stress absorbing characteristics and excellent recovery traits.
FlexiStop™ is solvent and halogen free and environmentally friendly, also FlexiStop™ has been subjected to BS6920 Test On Effect Of Water Quality, producing satisfactory results for all five leaching tests.