alexoftheorchard

Hi all, I’ve been renovating a timber framed bungalow for the past decade, on and off. It started life as a flimsy 3x2 prefab made from the best fir you’ve ever seen. Broadly speaking, I have retrofitted a 4x2 frame inboard, bolted it all together, sistered up every floor joist and insulated it all to a very high standard. Effectively, I have built a house within the house. I’m planning to clad one side in vertically fixed thermowood, with battens and counter battens, Tyvek against the existing weatherboards / in some fully rebuilt areas, fresh OSB. This is all very straightforward until I get to the brick foundation / bearer plates. Given the unusual build method, I’m trying to come up with a detail that closes this awkward cavity, weatherproofs the bearers and joists and doesn’t wick moisture from the brickwork. As you can see from the picture, there is no continuous rim joist, just intermittent bearers sat on bricks, with joists spanning across. Naturally this has been beefed up accordingly to accept the new 4x2 wall inboard, but I still need to create a finishing detail here that works. My initial thoughts are fibre cement board beneath the OSB running down to ground level, with vents cut in matching the existing subfloor vents. Can anyone suggest something better? PS - please excuse the state of the brickwork, it isn’t my work and can’t really be seen given how narrow the path is beside it!

Hi all, I’ve been renovating a timber framed bungalow for the past decade, on and off. It started life as a flimsy 3x2 prefab made from the best fir you’ve ever seen. Broadly speaking, I have retrofitted a 4x2 frame inboard, bolted it all together, sistered up every floor joist and insulated it all to a very high standard. Effectively, I have built a house within the house. I’m planning to clad one side in vertically fixed thermowood, with battens and counter battens, Tyvek against the existing weatherboards / in some fully rebuilt areas, fresh OSB. This is all very straightforward until I get to the brick foundation / bearer plates. Given the unusual build method, I’m trying to come up with a detail that closes this awkward cavity, weatherproofs the bearers and joists and doesn’t wick moisture from the brickwork. As you can see from the picture, there is no continuous rim joist, just intermittent bearers sat on bricks, with joists spanning across. Naturally this has been beefed up accordingly to accept the new 4x2 wall inboard, but I still need to create a finishing detail here that works. My initial thoughts are fibre cement board beneath the OSB running down to ground level, with vents cut in matching the existing subfloor vents. Can anyone suggest something better? PS - please excuse the state of the brickwork, it isn’t my work and can’t really be seen given how narrow the path is beside it!