Loft ventilation - retrofit vent trays

[Bargain Bucket]

Hi all. My roof is quite a low pitch which means that the loft insulation butts up against the sarking (the damned stuff is non breathable bitumen) and it's a struggle to cover the edges of the ceiling below without blocking the eaves with insulation. So I was considering fitting some loft vent tray (the continuous roll type) in order to provide some vented separation. Plainly I can't fit it as a continuous roll without lifting the tiles, battens and felt so I'm after some ideas of how I might retrofit eaves venting from within without taking the roof off. Any thoughts on how I might achieve this please? It's a 1940s extended detached house and the rafters aren't all a consistent width apart Many thanks.

 

[noseall]

Hi all. My roof is quite a low pitch which means that the loft insulation butts up against the sarking (the damned stuff is non breathable bitumen) and it's a struggle to cover the edges of the ceiling below without blocking the eaves with insulation. So I was considering fitting some loft vent tray (the continuous roll type) in order to provide some vented separation. Plainly I can't fit it as a continuous roll without lifting the tiles, battens and felt so I'm after some ideas of how I might retrofit eaves venting from within without taking the roof off. Any thoughts on how I might achieve this please? It's a 1940s extended detached house and the rafters aren't all a consistent width apart Many thanks.

Use the springiness of the insulation to wedge pieces of tray in place. Try and put some adhesive on the back (messy) first. Otherwise, if you are acrobatic, you could leave them long enough to staple them to the rafters. It's not like their design is intended to be accurate or flush. Their very purpose is to create a void so that air can pass by.

 

[RandomGrinch]

I've used refurbishment trays...

Manthorpe Refurbishment Eaves Vents - 600mm Rafter Centres (Box Of 50) | Roofing Superstore®

The G645 Refurbishment Eaves Ventilator is designed to be used in refurbishment situations and is fitted from inside the roof space to create a clear air ga...

www.roofingsuperstore.co.uk

Even though my rafters aren't consistently spaced, it's easy enough to trim them to size.