Bangor Roofing Services
Roof Flashing And Repair
Bangor Roof Flashing and Roof Repairs
Bangor Roofing Services are the number 1 specialist for all types of roof flashing in the bangor area of Wales.
Roof Flashing refers to a thin sheet of metal that prevents water entering the roof.
Roof Flashing operates on the principle that for water to enter a roof joint it must work itself upward against the natural force of gravity, for example wind driven rain.
Flashing can come in a number of forms:
Mortar Flashing
Cement mortar can crumble and allow water to penetrate. Gaps may appear where the flashing has come away from the brickwork.
Bangor Roofing Services can utilise a temporary repair for this type of damage by using a sand/cement mix using a PVA adhesive to help it bond to the remaining surface
We can also repair the damage more permanently using a Bituminous Mastic
Metal Flashing
If the flashing is torn or badly corroded then the flashing has all but lost its use for weatherproofing.
Bangor Roofing Services can repair this type of damage by removing the metal flashing but leaving the soakers in place.
Soakers are the separate small pieces of lead or zinc that are used to weather between the wall and the roof covering.
Chimney Repair
Bangor Roofing Services can Check for evidence inside the home and around the chimney breast walls or on the upper floor ceiling below or near the chimney stack for signs of dampness.
Dampness in these locations would indicate that the flashing is worn and may need replacing.
Chimney flashing can be quite difficult to repair or to replace as it is fitted in four sections. The slanted sides need stepped flashing, while the top needs a back gutter and the bottom requires an apron.
Apron flashing
The apron lies at the foot of the stack and should be the first section to be replaced. It is made in one piece and secured with lead tacks to the top of the tiles.
Stepped flashing
The stepped flashing is used on both sides of the stack. The sections are tucked into the mortar horizontally between the brickwork at the base of the stack, where they cover the soakers. Soakers are separate small pieces of lead or zinc that are used to weather between the wall and the roof covering. The size of the soakers will vary according to the type of tile or slate used on the roof.
If the old flashing sections have been removed, then the tiles on both sides have been removed first to allow access to the stepped flashing. To replace this section, lay it underneath the tiles on the side of the stack but over the front apron. Mark its position against the brickwork and mark on the mortar joints. Fitting new lead stepped flashing will give long-lasting waterproofing as well as the most attractive finish to the roof. Point all flashing with a sealant. Repeat the procedure on the opposite side of the stack.
Gutter flashing
The final section to be fitted is the gutter flashing at the top end. This is normally one piece that sits over the end of the step flashing.