Roof spread occurs when the downward pressure of the weight of the roof starts pushing against the rafters enough that the structure itself begins to move.
Roof spread repair.
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.
Behaviour and repair of carpentry connections rotational behaviour of the rafter and tie beam connection in timber roof structures journal of cultural heritage 13 no.
Average time required to complete repair work.
Corbel conservation s robin russell provides an introduction to structural timber repairs in historic buildings.
The emphasis of the article is on repair and reinforcement options including the use of scarf repairs stainless steel flitch plates and the use of resins.
At the back note the fascia and guttering had the tell tale signs of bowing and being pushed away from the brickwork.
Factors that cause the situation include bad construction improper materials and water and rot problems.
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This will ensure that any repairs or modifications undertaken will not harm the existing structure.
The table below shows the typical price of different roof repair jobs.
Gaping cracks and gaps meant the structure needed a complete rebuild.
The mathematics of rafter and collar ties web article math encounters blog november 2010 retrieved 2016 04 15 original source.
The article concludes with a section outlining approaches to the problem of roof spread.
Type of roof repair.
The problem of resisting roof spread is a real one and it is always worth checking how roof spread is resisted when carrying out repairs or modifications to a timber framed structure.
Rotten or beetle infested timbers this is usually due to long term leakage and poor ventilation.
Roof spread can be dangerous for a house and very damaging for a roof.
Roof spread the rafters have pushed outwards causing the top of the wall to bulge which means that the rafters may sink and cause the roof to dip in the middle.
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.
Either the roof starts moving downwards or the walls start pushing outwards.
Replace ten roof tiles on a typical two bedroom terraced house.
This is a prolonged process but can cause severe damage to the integrity of a home.
