Factors that cause the situation include bad construction improper materials and water and rot problems.
Roof spread cracks.
Roof spread was detected recently in a property where the concrete tiles had pushed the front and back flanks down together with the top flat roof.
This can require very large rafters sometimes up to 225 mm in depth.
Since the rafters are fixed to timber wall plates sitting on the head of the masonry wall then roof spread pushed out those wall plates in the process pushing out the masonry below.
The tops of the walls can be visibly displaced and cracks appear at the junctions between the external walls and internal partitions ceilings.
Roof spread occurs when there is a failure to adequately support the main rafters of the roof so as to prevent them spreading further open in a scissor type action.
So fixing the problem as soon as possible is vital.
Try to get it about 2 in 5 1 cm beyond the.
The damage was indicative of roof spread but was not quite serious enough to manifest any obvious visual problems to the front elevation of the property.
Roof spread can be dangerous for a house and very damaging for a roof.
Roof spread cracks repairing a roof leak with henry s wet patch.
Therefore the first signs of roof spread are often cracking bulging or leaning at the head of the masonry causing bowed walls.
Spread the cement under the surrounding roof material as much as you can.
There was a long crack to the internal corner of the ceiling to wall junction on the front elevation of the property and a further diagonal crack cutting down through the dividing party wall.
Caulk is not meant to be an adhesive.
Gaping cracks and gaps meant the structure needed a complete rebuild.
Roof spread roof spread is caused when the weight of the roof produces a horizontal outward force at the top of the walls triangle wants to flatten.
However if the rafters are large enough this spread can be reduced to an amount that will not cause cracking or noticeable spread of the walls.
Fill the hole with a layer of roofing cement.
Something else to look for in regards to roof spread is sag.
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At the back note the fascia and guttering had the tell tale signs of bowing and being pushed away from the brickwork.
Roof spread occurs when the principal rafters of the roof are not adequately supported causing them to open in a scissor like pattern.
With this arrangement the rafters are tied together at collar level but tend to spread below this level see fig.
Your patches will last a lot longer.
