Roof Spread Repair

Gaping cracks and gaps meant the structure needed a complete rebuild. 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. 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.

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Roof spread repair. The mathematics of rafter and collar ties web article math encounters blog november 2010 retrieved 2016 04 15 original source. 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. This is a prolonged process but can cause severe damage to the integrity of a home. At the back note the fascia and guttering had the tell tale signs of bowing and being pushed away from the brickwork.

Roof spread can be dangerous for a house and very damaging for a roof. Replace ten roof tiles on a typical two bedroom terraced house. The table below shows the typical price of different roof repair jobs. Type of roof repair.

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. Factors that cause the situation include bad construction improper materials and water and rot problems. Corbel conservation s robin russell provides an introduction to structural timber repairs in historic buildings. Average time required to complete repair work.

This will ensure that any repairs or modifications undertaken will not harm the existing structure. Rotten or beetle infested timbers this is usually due to long term leakage and poor ventilation. The article concludes with a section outlining approaches to the problem of roof spread. 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.

Roof spread affects a roof that begins to move after it is installed. 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. 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.

So fixing the problem as soon as possible is vital. 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.