This very big roof on a house in Birkenhead had already been repaired several timesover the years. The owners considered the cost of a full new roof to be prohibitive.
Over main years since the house was originally constructed the old felt sarking had rotted in many places. In the areas affected the slates were carefully removed and stored. The old battens had to be carefully cut out to access the damaged felt. New vapour permeable sarking membrane was threaded into position and new treated timber battens fixed. Finally the original slates were replaced.
The roof on this traditional country cottage had begun to sag due to the age of the rafters.
A full roof replacement was necessary. The rafters were were replaced, new sarking and treated battens installed and new slates fitted.
The leadwork and timber fascias were also replaced. The existing leadwork onthe chimney was re-dressed. A new Velux roof window was installed.
The weather side of this concrete tile roof was leaking.
Sequence showing removal of existing tiles from roof in order to access the sarking felt beneath.
Old felt and battens are removed and replaced with vapour permeable waterproof sarking membrane and treated timber battens. British Standard Code of practice BS5534 governs the type and installation of sarking membranes. Modern sarking membranes are designed to be rain-shedding but vapour permeable to prevent a build up of potentially damaging condensation in the roof structure.
Selecting the correct material and installing it correctly contributes to the overall performance of the structure and minimises the chances of faults occuring in the future.
Having carefully removed the existing tiles to carryout the repair, these tiles were then re-fixed and then a mechanically fixed ridge tile system was installed.