If you need fascias, soffits or guttering replaced in March, here is exactly what a proper installation involves from the first inspection to clearing up at the end.
Fascias are the boards fixed to the rafter feet at the lower edge of the roof. Soffits close off the underside of the eaves between the fascia and the wall. Guttering sits in brackets along the front face of the fascia and carries rainwater to the downpipes. All three work together, and when one fails the others are usually not far behind.
The job of keeping this system sound is not glamorous, but the consequences of ignoring it are costly. Water that overflows from blocked gutters or drips from cracked fascia joints soaks into the rafter feet and spreads up into the roof structure, affecting the felt and the roof deck. Rafter repairs or felt replacement are major jobs - keeping the roofline in good order is what prevents them.
Every roofline job starts with a proper look at what is there. From the ground, a roofer should be able to assess the overall condition of the gutter runs, spot any obvious sag or separation, and identify areas of staining, moss or paint failure on the fascia and soffit. A set of binoculars or a zoom-lens camera helps on taller properties.
A ground-level look is not enough on its own. To give you an accurate picture of what is needed, we need to get close to the boards. That means setting up a ladder or a scaffold tower safely and inspecting the rafter feet behind the fascia, the condition of the felt at the eaves, the soffit fixings and the gutter joints. Many fascia boards look presentable from the ground but are soft at the back where they contact the timber, or rotted at the joints where water has been sitting.
This inspection stage determines whether you need a repair or a full replacement. On some properties, a single cracked gutter section or one area of soft fascia can be dealt with at low cost. On others, a full roofline replacement is the only sensible answer once the extent of the deterioration becomes clear.
Once the ladder is up and the existing boards can be handled, the rafter feet behind the fascia need to be checked individually. This is the step that separates a thorough job from a cosmetic one. A rafter foot is the end of each roof rafter that projects out to carry the fascia board. If the fascia has been leaking water for some time, these feet are often soft or rotten to varying degrees.
Any rafter foot that is soft, crumbly or has lost more than a small amount of structural thickness needs to be cut back to sound timber and sistered with a new section of treated softwood. This is fixed alongside the existing rafter and provides a sound anchor for the new fascia board. Skipping this step and fixing new uPVC boards directly to compromised timber means the new system will pull away as the rot continues - sometimes within a few years.
The roof felt at the eaves should also be checked at this stage. Felt that overlaps the fascia can become brittle and crack, particularly on older pitched roofs. A split or shrunken felt edge allows water to run off the tiles and directly onto the fascia board from above, rather than into the gutter. Repairing the felt at the eaves while access is already set up adds little to the overall cost of the job and prevents future problems.
Once the inspection is complete and any timber repairs are agreed, the existing guttering, fascia boards and soffits are stripped off. Old gutter brackets are removed and the old fixing holes in the rafter feet or wall plate are checked. Guttering is taken down section by section, joints are opened, and the material is set aside for disposal. uPVC and aluminium guttering can often be recycled - ask your installer to confirm how they are disposing of it.
Old fascia boards sometimes cling on at the joints or nail fixings and need to be carefully prised free without damaging the rafter feet further. Plywood soffits that have delaminated can be fragile and need to come off in manageable pieces. The finished result of the strip-out should be clean, exposed rafter feet and a clear wall plate or brickwork ready to take the new system.
Any rafter sistering or timber repairs identified in the inspection happen now, before the new boards go on. This is also the moment to check the wall plate - the horizontal timber that sits on top of the wall and on which the rafters rest. Wall plates can rot where gutters have overflowed onto them for years. A sound wall plate is essential for the fixings that hold the soffit in place.
Treated softwood is used for any new timber in this position. Treatment is important because the eaves are a damp environment by nature. Highly durable preservative-treated timber is the correct specification here and is standard practice on any well-executed roofline job.
New fascia boards - typically uPVC but sometimes aluminium - are fixed to the rafter feet. On a pitched roof, the top edge of the fascia should sit just below the leading edge of the roof tiles, with a small gap that allows the roof felt to drain into the gutter. If the felt is tucked tightly behind the fascia with no clearance, water cannot drain properly and pools behind the board.
uPVC fascia boards are cut to length on site and fixed with stainless steel screws or nails. Butt joints between boards are covered with a snap-on jointing piece to keep water out. At the corners, mitred external and internal angle pieces give a neat finish and prevent water from sitting in the joint. On a long run, expansion joints need to be built in so the boards can move with temperature changes without buckling or pulling at the fixings.
Aluminium fascias are handled slightly differently. The boards are stiffer and heavier, cut with a fine-toothed blade, and the fixings need to be compatible metals to avoid corrosion. The powder-coat finish means colour choice is wide, but aluminium systems typically take a little longer to install than uPVC.
Soffit panels slot into a channel running along the bottom edge of the new fascia. At the wall end, the soffit is either fixed to a timber bearer nailed to the wall, or it sits in a J-channel fixed directly to the brickwork or render. The soffit should sit flat and level, with no visible sag, and any intermediate supports needed on a wide soffit run should be installed at the correct spacing.
The choice between ventilated and solid soffit panels is made at this point. Ventilated panels have a series of perforations or a mesh strip that allows air into the roof space. This is important on a cold-deck roof where the insulation sits at ceiling joist level - without ventilation the trapped air in the roof space becomes moist and damages the felt and timbers above. On a warm-deck roof where insulation is at rafter level, ventilated soffits are not needed and can cause problems. If you are not sure which applies to your property, ask before the soffits are ordered.
Gutter brackets are fixed to the new fascia face at the correct centres - typically every 500 to 600mm for plastic guttering, closer for aluminium. The first bracket is set at the high point of the run, usually the end furthest from the downpipe outlet. A string line or laser level is used to set the fall: the gutter should drop around 5mm for every metre it runs toward the outlet. Too little fall and the gutter holds standing water, encourages moss and puts weight on the joints. Too much and it looks wrong and can pull at the fixings at the lower end.
Gutter sections are then pushed together with the rubber seal properly seated in each socket. Corners, stop-ends and outlets are cut in accurately - a ragged cut at a union or outlet is a common source of joint failure a year or two after installation. Downpipes are fixed to the wall with pipe clips at the top, bottom and every metre of run in between, and should discharge cleanly into an existing drain or a hopper.
Where a property has a large roof area or a long single-pitch section, a deep-flow or Hi-Cap gutter is worth specifying to handle the volume of water in heavy rain without overflowing.
Once the guttering is hung, it should be tested before the scaffolding or ladders come down. Pouring a bucket of water at the high point of each run shows whether the fall is correct, whether all the joints are sealing and whether the downpipe is discharging cleanly. Any joint that weeps under this test should be re-made on site immediately - it will not improve with time.
A visual check of the fascia and soffit at this point confirms that all joints, corners and expansion pieces are seated correctly and that there are no visible gaps where water or wildlife could enter the eaves.
A roofline job generates a reasonable amount of waste - old guttering, scraps of uPVC, old timber boards and debris from the strip-out. All of this should be cleared from the site and disposed of correctly. Any garden plants or surfaces below the working area should be protected during the job and restored to their original state once work is complete.
At handover, the customer should be able to see clearly where any timber repairs were made, confirm the profile and colour of the materials installed, and understand how to maintain the guttering going forward. Clearing leaves and debris from gutters once or twice a year, and checking that all downpipes flow freely, is the main ongoing maintenance task for a uPVC roofline system.
Our work covers the full range of domestic roofing, including pitched roof tile and slate repairs, chimney repointing and chimney repairs, flat roof installation and repairs using felt and EPDM rubber systems, and roof leak investigations. We carry out roofline work across March, Ely, Soham, Littleport, Sutton, Haddenham, Stretham and neighbouring villages.
If your property in March needs a fascia, soffit or gutter inspection, call us to arrange a survey. We will tell you plainly what is needed and what it will cost before any work starts.
A well-installed roofline system should look neat from the ground - straight gutter runs with a consistent fall, square corners, no visible gaps and no sagging sections. More importantly, it should be structurally sound: every fixing into sound timber, felt correctly draining into the gutter, and all joints sealed and tested.
A good installer will show you the rafter feet before and after any timber repairs, confirm the fall they have set and why, and explain the ventilation choice on the soffit. These are the markers of quality workmanship that matter long after the installation is finished.
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