Everything you need to know when selecting a solid roof.
There are a lot of lightweight tiled roof iterations out there, and beyond selecting a product for price there are several points that you should question when you are selecting the system you want to sit under.
Will my roof be prone to condensation?
Definitely not something you want to be dealing with!
So, you may have heard the terms dew point and interstitial condensation… but never really looked into what they mean. Now is as good a time as any….!
If there is one thing that cannot be avoided – unless you live on Mars, because there is no atmosphere out there – is that our air contains moisture. In the UK, average relative humidity (moisture) levels can be as high as 80%.
Dew is created when the air cools and moisture forms on surfaces as it can no longer hold onto that water.
Not much of a problem on the outside of windows, or even on roof tiles. More of a problem when this happens on the inside of the roof and creates interstitial condensation.
Interstitial condensation is formed when cool moist air (read: UK air) gets into the fabric of the roof and hits warmer air, or components that are warmer. If the temperature change is significant enough the dew point will be reached and form condensation that can eventually turn to mould and spread.
To make sure your selected solid roof will not create interstitial condensation
– Check that there is a suitable ventilation cavity to take out the moist air out of the roof, situated above the insulation and on the cool side of the roof
– Make sure the insulation supplied is sufficient to minimise any cold bridging and stop warm air from reaching the external rafter.
– If the system uses a cold bridging aluminium frame (unlike Icotherm’s roof): ask if that metal is suitably clad in non-conductive material to limit the possibility of condensation
– Check that the design specification includes vapour control barriers on the room side
– Check that the roof has successfully been through a CRA (Condensation Risk Analysis)
Doesn’t ventilation just mean draught?
A correctly ventilated solid roof will allow air circulation where it matters the most: well away from the room it sits on top of, right under the tiles and above the insulation. Check that the ventilation routes and vents on your Icotherm roof are not blocked. It will invalidate the manufacturer’s warranty.
Why clad-overs should be avoided – in our opinion
You might be considering a clad over as a low budget option; it has its place if:
– You are not looking to add value to the property or need Building Control approval.
– You are not looking for the best performing roof or the prettiest finish
– The insulated roof does not exceed the original weight it was designed for; roofs collapse are a thing.
So, the Icotherm roof system
The Icotherm roof system uses a solid roof construction, with 150mm EPS fully recyclable, rigid insulation, and is fully ventilated. It has been CRA checked and is JHAI certified (pre-approved for building control purposes)
Supplied in ready to “slide on” pods, which can be made to suit hard to access installation sites, such as having to go through the house (ie small pods), the Icoroof allows your prefereed installer to replace / install your roof quickly and efficiently.
Ask for Icotherm by name
At the Build Show, installers and home improvement companies learned how easy it is to add solid roof conservatories to their range with Icotherm Roof Systems. Featuring on the PiGS Pavilion in the Doors, Windows & Glass Show, Icotherm used the opportunity to showcase its timber solid-roof technology to visitors.
Dave Jackson, Director at Icotherm Roof Systems explains: “The Icotherm roof was specially designed to make it easy for installers to add it to their range. It can be fitted using the tools you’d find in any installer’s toolbox and clever innovations make it fast to fit on site, so home improvement companies can fit in more jobs.”
Icotherm Solid Roofs use SIPS-style ‘pods’, which are 70 percent assembled in the factory, leaving less to fit on site. There are very few components and insulation is pre-cut so that roofs can be made watertight in as little as 2 hours. A special drainage mat ensures there is a sufficient air gap between the roof and the tiles without the need of battens. Plus, roofs are easy to adjust on site during the install.
Fully insulated and fully-ventilated, Icotherm Roof Systems include the Icotherm Solid Roof and the newly-launched IcoSpan Flat Roof that’s perfect for orangeries and glazed extensions.
Dave adds: “Being a part of the Build Show has really helped to get our product in front of a wider range of home improvement companies who are looking for innovative products to add to their offering.”
The PiGS Pavilion organised by Balls2 Marketing, was part of the Build Show at UK Construction Week at the NEC.