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Cromer Vent 3 Air is BBA certified for unventilated cold roofs and is good value so should tick the box. Do we need to re-think the use of intello on our upstairs ceilings?

How do I convince my building contractor and build control we don't need eaves ventilation and can then benefit from improved thermal performance by removing wind washing of the insulation, reducing convection and possibly a better environment in the attic for MVHR systems? We have a mix of existing and new conventional cold roof constructions with 400mm build up of mineral wool insulation that will soon be ready for "felt & batten". I have specified Pro Clima Intello as the vapour control layer which will be installed under the trusses behind the plasterboard ceilings and lapped onto walls. Unfortunately, we don't have ceiling height to add a service void for lights and cables so we will have to be super diligent with sealing penetrations etc The original building has 50mm cavity walls which will be pumped with insulation and 90mm of EWI (the new extensions have 150mm cavity and no EWI) - I await the final detail drawing from our consultant but believe 50mm of PIR will be installed at the eaves to improve insulation in a weak area plus "provide the required 25mm air gap" for eaves ventilation. So much conflicting content on the cold roof ventilation debate so looking for others to share there experiences and insight. Is Cromer Vent 3 air the answer or am I missing something?

thanks both - I'm holding a follow up meeting with the supplier later today to discuss specs.

Thanks Craig, very helpful. How do you feel about the overall spec vs cost compared to alternative manufacturers?

I have now received a spec and pricing form my local supplier. This is my only price for the front entrance door so I have no other reference, yet.

On our renovation project the exposed west elevation will incorporate adjustable external louvres to combat solar gain in an office (above garage), master bedroom and living area - as per this image. It would be great to hear others experiences and what features to consider and how they got on with sourcing and installation. I have started a discussion with Sunshield Unique Louvers- their website is a rich resource and their systems look great but I haven't found any client reviews online.

great question with no explanation to offer! I should be getting a quote from my supplier this week....

Thanks Craig - I appreciate the insight.

No takers then. There range of doors is substantial and looks high end, clearly they don't have a presence in the UK market. I could be a first!

I have been recommended this company for a grand front entrance door. Do any forum users have experience with this French manufacturer?

Good evening. I have been unable to find any views on Finstral windows and a wider search online is limited. Has anyone used this company and if yes, share their experiences? They appear to be be a substantial window & door manufacturer in Europe. I have previously been happy with Rationel but my local window distributor has suggested looking at Finstral for my current project and I would like some independent feedback.

I thought I would resurrect this post as I'm faced with a very similar position as you and would be keen to know how it went. I have been researching methods to remove ventilation in our attic roof space (cold roof construction) during a major property renovation and came across this discussion. As we are installing EWI and taking lots of steps to improve U Values and air tightness, I believe the draughty attic is a weak link in our quest. I have shared this "method" with my builder and he has responded with the same questions, especially the detail around the wall plate and how to airtight seal around all the trusses as we simply can't "wrap around" the Tyvek Supro. Any further pointers appreciated.

My building contractor is also suggesting Cortizo sliders on our renovation project (he has them fitted in his own home). Is the view this system is not fit for purpose in the UK climate?