Owning a flat roof comes with its own set of challenges, one of the biggest being, that most flat roofs built pre 1986 are seriously lacking in any significant insulation which makes them terrible at keeping your heat in, making your room underneath cold and expensive to heat.
Even if your home had some insulation, built pre 1986, may had insulation placed between the joints with no ventilation, consists condensation.
The problem with this way of insulating is that you MUST have an air gap of at least 2 inches (50mm) with a constant flow of circulating air above the insulation and below the sub-deck to get rid of the potential condensation. This uses the same principle as when you clear your car windscreen by blowing air across it to get rid of the condensation.
So this method of construction solved the condensation problems flat roofs were having before 1986 but created a very inefficient flat roof in the process.
It’s worth checking your roof to see if in fact it has got any effective ventilation because lots of flat roofs don’t especially those built before 1986 and some after this time as the regulations took time to implement.
Did you know the average family produces 20 pints (5 gallons or approximately 12 liters) of moisture every day. Think of it as two and a half builders buckets full of water and you will see the scale of the problem your home has to cope with. A single tumble dryer produces approx 7.5 liters of water a day to add to this, so kitchens, bathrooms and utility rooms are very high risk.
Your roof may well suffer with hidden condensation problems that can rot the timber structure and cause unseen mould and spore build up that can in the worst cases cause a complete collapse of the roof structure as well as potential health issues.
Since April 2006, if you’re refurbishing 50% or more of your existing flat roof, you are required by law to upgrade the insulation in your flat roof in order to comply with the Government’s “Conservation of Fuel & Power in existing dwellings” Part L1b regulations.
To make sure you get the very best and latest information relating to ALL of the new building regulations the Government have allowed the NFRC (National Federation Of Roofing Contractors) to set up something called the “Competent Roofer Scheme”.
All of the potential pitfalls and problems described above can be overcome by upgrading your flat roof using a County Flat Roofing EcoWarm Flat Roofing System.
For the last 10 years or so most new build flat roofs are constructed using a “Warm Roof System”, simply put; this involves fixing solid insulation boards to the top of the flat roofing deck and by doing this you completely eliminate the need to ventilate between the joists and therefore cold air circulating and plunging into your home causing draughts and cold spots.
So because of this you DON’T get unwanted cold air circulating into your home making it cold and draughty as we block up all of the existing vents (if you have them).
Your existing roof is encapsulated with 5 inches of (120 mm) of solid polyisocyanurate (PIR) insulation boards as standard along with the required vapour control layer.
I mentioned the excellent quality of your team’s workmanship and how the insulation proved to be very effective in the snow early in 2010 as these pictures show. Again, many thanks.
In most cases the required U value can be achieved with about 80 mm of insulation, however using this depth of insulation can lead to an interstitial condensation risk if you’ve already got insulation between the joists, so in consultation with Kingspan they have calculated 120mm to be the required solution.
Not all insulation boards are the same so we’ve partnered, and become approved installers, with the country’s leading insulation manufacturer “Kingspan” to ensure that you only get the strongest most efficient insulation fitted to your flat roof.
Because you’re dealing with a company registered as a Competent Roofer, meaning we’ve been authorized and checked to be compliant, there’s no need for you to inform and pay your local Building Control Dept. to check our work, we simply self-certify via the scheme and your local office will issue you a valid certificate.
Then to protect your layer of new insulation we waterproof using the latest fusion bonded single ply membranes, meaning your roof and insulation is fully protected against anything the UK weather can throw at it.