The Process of replacing your concrete gutters involves 10 distinct phases. Our experienced surveyors will guide you through the stages when they survey your property.
The Concrete Gutter is carefully measured. Any obstructions such as cabling, security lights etc are noted. The roof is examined internally to asses the condition of the roof and sarking felt. (its pointless replacing the gutters if you need a re-roof, better to do both jobs at the same time to reduce overall cost). A preliminary assessment of any dangers such the as asbestos is made. A photographic survey of areas affected by subsequent works is undertaken. A fixed price quotation is given to the customer. At this stage we will determine whether a Party Wall Notice is required..
A risk assessment is made to identify any potential hazards or problems so they can be negated. If asbestos is present it will be identified in order to facilitate its safe removal and disposal. We aren’t licensed to dispose of asbestos and use a partnering contractor to ensure its safe disposal.
Remove the existing
The first row of tiles is removed and any rotten felt is cut back. Any gutter lining that has previously been installed is removed and disposed of. The old concrete gutters are cut off, removed safely and placed in the skip ready for removal. It’s important that scaffold and the property are kept free of debris to avoid trip hazards as work proceeds. Our fitting team will also check the condition of the rafter feet and conduct any remedial work required.
This stage encompasses scaffold erection, sheeting up, security arrangements, provision of a skip for waste disposal.This will usually happen the day before work is due to start.
Fit the backing
A 38mm x 150mm structural grade C16 ( pretreated by pressure vaccuum to BS 8417) timber back board is frame fastened to the remaining face of the concrete concrete gutter to provide structural strength to the rest of the installation. NOTE: Some companies use a 25mm back board which will not meet the requirements of any major UK roofline supplier as the fascias need 30mm of the fixing to penetrate into the substrate.
Fit the insulation
This is a very important stage. This will prevent the formation of condensation and subsequent mould and damp to the inside of your property. A 25mm layer of Celotex PIR insulation board is screwed to the backing board.
We are currently working with our suppliers to produce an alternative system which will allow a greater thickness of insulation. Note:We are currently engaged in designing a new system with 50mm insulation & no backing board.
Fit the eaves protection
The eaves protection system comprises a rigid plastic sheet with a built in ventilation system,. The head lap goes beneath the sarking felt and channels any excess water into the new gutter system.
If you have a profiled tile we fit bird combs to prevent any birds, bats or large insects making a home between the underside of the tiles and the sarking felt.
Fit the PVCue
The Fascia is fixed through the insulation and into the backing board with stainless steel screws. The fixing centres are dependent on the plastic profiles being used. 600mm centres, double fixed for white, 450mm centres double fixed for woodgrain profiles. The fixings must be capable of withstanding any imposed loadings, and must achieve a minimum 30mm penetration into the back board. We use either hollow soffits or solid depending upon your preference. For more information on available profiles see our Choose Your Fascia page.
Fit the gutter
Whenever possible the new gutters are laid to the correct fall (minimum 1:350). The fall helps to clear the gutters of accumulating debris and silt washed from the roof. We place the outlets in position and then one bracket at the end of the run, intermediate brackets at no more than 800 mm intervals using a string line or laser (we leave the choice to the installation team). The brackets are double screwed with stainless PZ 25mm x 4mm screws (as per the manufacturers fitting specification). The gutters are then cut allowing for 5mm expansion at each joint. We use Ogee gutter profile which takes up to 1.7 times the flow of a half round gutter, ensuring that the system will adequately discharge the water from your roof. Quite often we have to make a joint to the adjacent property. We form a box from the fascia profile and use a special hydrophilic (expands on contact with water) joint to ensure a water tight connection. Lastly we fit new rainwater pipes brackets at 1 metre centres.
The new roofline elements and all surrounding areas are cleaned, including windows and doors. All scaffold, sheeting and rubbish is removed from site. The work is then inspected for quality and cleanliness to the satisfaction of the customer before being signed off by client and company surveyor. We then ask you to fill in our feedback form and customer satisfaction sheet.