There are many problems that can occur with roofing and it’s important to know when there’s an issue and how to fix it. The need for re-roofing is rare, but minor issues can turn into major ones and affect the value of your home.
Missing slates and tiles
Dislodged tiles are usually caused by severe storms or satellite dish installations. Missing tiles and slates aren’t severe issues, but should be fixed to avoid future problems, especially with older roofing.
You can repair the roof yourself by:
Lifting the two tiles above the broken or missing tile and supporting them using wooden wedges.
Get the broken tile off the batten using a plastering trowel or similar.
Put the new tile in place, hooking the nib of the tile over the batten.
Sagging roof slopes
In minor cases, sagging roof slopes aren’t a problem, but severe cases need immediate attention. There are many causes of severe settlement.
A structural engineer will need to perform remedial work. Purlins and struts can improve support for overloaded roofs. In severe cases, the internal walls below must be stabilised. If there is leakage, then ventilation needs to be improved. UPVC fascia and soffits can provide your roof with effective ventilation, and companies such as https://www.absolutebuildingplastics.co.uk/upvc-fascia-boards/ can advise on the best products.
Old slates and tiles
Your slates and tiles need replacing if 10 or more per slope are missing or damaged. Your loft may have a damp smell, with water stains from where the tiles haven’t shielded it from rain leaking through.
If there’s severe deterioration, the roof may need to be re-covered. The roof will be stripped to the rafters, and new underlay installed and covered with slate or clay tiles. It’s possible to reduce costs by salvaging some of the old tiles.
Lead flashings can sometimes become loose, but they are usually very durable. Mortar fillets are prone to cracking, as they are considered a cheap alternative to lead. The main issue with defective flashing is it causes damp and, if left for too long, timber can rot.
Decayed timbers will need to be replaced. Lead is the best material for replacing defective flashings. It’s expensive but durable and long lasting. It’s even possible to recycle and salvage some of the old lead.