The picture is of a oak framed house with brick infill
panels, that has been very poorly repaired using little knowledge or the skill
required to carry out the restoration work. You can see that the builder has
used modern bricks to the infill panels and
has also used a cement mortar mix. You can also see the modern cement render
that the builder has used to render the external wall. This has retained moister
in the wall masonry allowing damp and rot to set in.
The restoration work to this house requires specialised oak
frame repair skills and materials, hand made bricks, lime mortar and three coat
lime render work to the external wall.
Period houses were traditionally
rendered in lime render for a very good reason, lime render is permeable which
allows any moisture in the wall to pass through the lime render which in turn
allows the wall to ‘breathe’. Modern cement rich rendering is impervious and prevents
the masonry wall from breathing this will trap moisture behind the cement
rendering and can cause damp to the inside wall this can cause rot to set into the
timbers, stone or masonry wall.
Lime rendering relies on good background preparation work the
dubbing out of all damaged joints. First coat is by casting or harling a suction
bond and mechanical keying is how the lime render adheres to subsequent coats two and
Lime render is the only render that should be used on listed buildings
restoration or renovation projects, because of its durability, elasticity and
vapour exchange capabilities.
Lime render can be
used on the following backgrounds
Cob Earth Stone
Wooden lath Soft bricks Porous blocks
Medium brick Dense bricks Dense stone
of Leamington Spa are committed to offering high quality service and
workmanship in specialised listed building and period house restoration
Tel : 01926 426242 Mobile : 07980 199963
written quotations All work guaranteed