Hi,
We are in the middle of a loft conversion and are in the process of removing the existing purlins and fitting a new 'purlin wall' lower down the roof slope. (the purlins are out and the roof is currently supported by 24 temporary vertical supports, one on each rafter)
To take account of the new longer unsupported span of the rafters the existing old 100x50 rafters are having new 150x50 rafters nailed alongside.
However, the existing rafters have sagged slightly over the past 80 or so years and the new 150x50 timbers do not fit alongside neatly.
Is this a problem? - is it OK to nail the new and old together even if the new rafters do not lie tight against the roof for the entire length.
I suppose that we are still giving strength to the old rafters.
Thanks Mark
We are in the middle of a loft conversion and are in the process of removing the existing purlins and fitting a new 'purlin wall' lower down the roof slope. (the purlins are out and the roof is currently supported by 24 temporary vertical supports, one on each rafter)
To take account of the new longer unsupported span of the rafters the existing old 100x50 rafters are having new 150x50 rafters nailed alongside.
However, the existing rafters have sagged slightly over the past 80 or so years and the new 150x50 timbers do not fit alongside neatly.
Is this a problem? - is it OK to nail the new and old together even if the new rafters do not lie tight against the roof for the entire length.
I suppose that we are still giving strength to the old rafters.
Thanks Mark