Working on the roof
It may not be possible to replace a slate immediately. In order to minimise any water
damage, weather proof the slate temporarily. Prop up the slates that overlap the cracked
one with wooden wedges, and use a wire brush to clean the surface round the crack.
Using a piece of flashing strip Use flashing strip primer to coat the
cracked area. The primer will ensure a good bond once the flashing strip is in position.
Make sure you use enough to cover the width of the strip to be used. Use a section of
flashing strip long enough to cover the crack completely. Push the strip into place and
check it is well seated. Use a small roller over the strip to firmly push the strip down
into position.
Using a bituminous sealant Use an applicator gun to inject the bituminous
sealant along the crack.
Working in the loft space
Use an applicator gun to inject adhesive expanding foam along cracks or gaps from inside
the loft.
