Flat Roof insulation

New Roof Cost

Needs stripping and starting again, which adds to the new roof cost! New roof cost and how to keep the cost down. This is one of those things where the more you know, the worse it gets as you start to understand the complexity of what you’re about to do and the new roof cost and what’s involved in doing it properly! As a roofing surveyor, I’m constantly attending people’s houses after they have paid lots of money for new roofs, but I then have to tell them that everything is wrong and they need to completely replace the roof at some point, probably sooner rather than later. It’s mainly new loft conversions and extensions, as the trend at the moment (2022) is to get the builder to do all the work,  including the new roof work. Even if a roofer is brought in to do the roof and finish the project, they will be working with the mistakes that have probably already been made. These mistakes normally start way back in the project, even as far back as the drawing stage. Generally speaking, On small projects like extensions and loft conversions (small doesn’t mean low cost, I’m talking £50K, £100K even £200K projects), even if the people doing [...]

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Thermal Bridging

Thermal Bridging of an Insulated Flat Roof Through the Front Fascia

I have watched a few of your videos in regards to flat ‘warm roofs’ on YouTube and have found them to be of great guidance with my current new build extension. Accordingly, I would be most grateful if you would answer a couple of questions that I have regarding your video posted on YouTube entitled ‘Thermal Bridging of a insulated flat roof through the front fascia’.

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Warm Roof & Cold Roof Venting

Warm Roof & Cold Roof Venting

I had the conversion done 20 years ago. The flat roof has a very shallow slope and consists of joists, surmounted by furring pieces, transverse spacing battens for ventilation, ply deck with mushroom ventilators, and multiple felt layers.  It is also penetrated by a soil pipe near the condensing boiler vent. The ply deck appears to be in sound condition but blackened, presumably by condensation. 

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Old Mineral Felt Roof

Enquiry Regarding Old Mineral Felt Roof

I have converted the garage into a games room and the ceiling has damp patches and the fuse has blown for the lighting. The roof has a drainage hole in one corner which is not very effective , as I have previously seen water pooling on top of the roof.  I would also like better insulation in the roof as there is a lot of heat loss and wind that comes through the ceiling light fittings.

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