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Old lead valley
Troublesome ageing lead valleys and flat roofs are the source of many leaks. Many a time the lead lengths are too long leading to stress cracks. Strip the lead out (or leave as base former) and form a new valley using modern blends of fibreglass & resins followed by a choice of top coats. GRP will out last felt and lead easily if laid well and often qualify for 20 yr plus guarantee's. Bonus also is that the GRP probably costs less than lead too.
GRP fibreglass valley
New valley to replace leaking lead one, finished in light grey topcoat. Bespoke fitting free as standard on GRP work. Contact us for a free quote and advice on how we can resolve any flat roof or valley problems you may have.
Sagging roof, porous tiles & felt
Constant leaks from so many sources including a very common fault built in from the start - insufficient overlap. In Cornwall it is normal requirement to have 100mm but we regularly find just 50mm allowing the driving rain to penetrate.
Newly finished roof
Mini Stonewold 30 tiles replacing old porous double romans. All work to BS 5534.
Loose roof sections
Loose or dislodged pointing on ridge, cracked ridge joints, chipped tiles and poor verges are easy targets for water penetration leading to expensive rot repairs to the roof.
Rotten battens at verge
Verge removed showing the damage to battens. Wet systems (mortar bed) can be removed from the verges when installing dry verge systems, this allows more air movement and stops moisture ingress. For the most though clients prefer to leave the wet system in as this is a more economic repair but hides potential rot damage.
Example rotten batten at verge
Rotten battens at the verge or ridge cause drooping of the verge and possible water ingress at both locations.
Dry verge system
Here you can see the initial stages of installing a dry verge system. This roof had a wet system but we removed it to give maximum life of the roof and best possible ventilation.
If you have a porch sometime you will find the lead poor or even 'flashband' fitted as a seal, here before we fitted the new dry ridge system to the gable end we cut and formed in new code 4 lead aprons. It is important to seal the new leadwork with patination oil to prevent the lead staining white.
Cleaning a Rain Gutter
One of the most common causes of downpours from over flowing gutters. We can clean and install remedies to stop the blocks happening.
Rotten eaves and damp roofline
Here we found the tile head lap too short and along with an execessive moss buildup (retains moisture and blocks egress of rain water) combined to speed up the rot of the under tile felt (some times called sarking). The tile lap was rectified, continuous vents fitted along eaves and eaves support trays fitted under the old felt (in most cases cutting back of felt would be best and an insert of new material fitted would be best). The tiles refitted after a good clean.
Eaves ventilation with support trays
Eaves support and ventilation, this greatly improves loft ventilation and reduces or stops stagnant air in the loft.
Dirty roof vs Clean roof
Many houses suffer from damp ingress via the roof tiles but a re-roof is not possible due to funds. It is possible for us to clean the moss and lichen from the roof and spray with sealer. This stops water backing up and soaking through the tiles. The secondary barrier of felt should normally be sufficient to drain off water but most roofs have various holes in the felt of in bad cases the felt has saturated and then fails leaving tell-tale run marks down the roof trusses or rafters.
What lives in your roof?
This is an example of a moderately dirty build up of mos on a roof tile. On examining the moss maggots can be found infesting it, these hatch and crawl under the tiles and into your roof loft or void. They lay eggs and the cycle carries on.
Leaking cement tile valley
This valley kept leaking and had numerous repairs and over paints to seal the cracks etc, in the end a new valley was required.
Fibreglass valley or dry valley
Dry valley systems can be retro fitted or fitted from new, they provide a modern alternative to the lead and concrete typical fitments. They are easy and quick to fit and give a streamlined look to a roof valley. They are UV stable and wont degrade with exposure. If for any reason you incur any damage to them they can simply be repaired insitu.
Dry ridge system installation
This roof had a wet ridge system (ridge tile and mortar), this had numerous cracks around the shrunken mortar joints. On removal the battens were sodden and badly rotten leaving just the weight of the ridge to hold it in place. The dry ridge was retro fitted and has provided 100% water resistance along with continuous ventilation along its length due to the design of the flexible under membrane.
Dry ridge cut out view
You can see the process of fitting the dry ridge system to a profiled tile. The under membrane adheres to the profile and center battens, the dry joints clamp the ridge tile down mechanically. This provides a hassle free no maintenance solution to the ridge installation.
1850's cottage roof refurb
The roof had old Chinese slates on which were removed and replaced with Spanish slate. During the re roof it was discovered that the rafters were rotten along the eaves. These were removed and replacements fitted and the whole roof treated. Old houses are not as straight forward as newer builds and it is very common to come across additional issues once the work is progressed. It is essential that a flexible approach is taken so that you can adapt to the changes ahead.
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