Tile Roofs

Tile Roofs come in a variety of shapes, sizes and designs.

Conventional, Peter louw, Fibre cement and Everite slate roofs.
Maintenance to slate roofs.

Slate Roofs

Iron Roofs

Corrugated and IBR Iron Roofs.
Maintenance of Iron roofs.

Waterproofing

Torch on systems.
Acrylic systems.

Tile Roofs

TILE ROOFS COME IN A VARIETY OF SHAPES AND DESIGNS.

The main thing to consider on a tile roof is the slope Lower pitched tile roofs require an adequate functioning underlay to remain water proof in cloud bursts and storms. An important factor to adhere to is the batten spacing.
The basic roof or truss structure must be sound and fitted to specifications. The batten spacing should be between 300mm and 320mm C/C using the normal +/—420 x 300 sized cement roof tiles. Various shapes and colours are available from different manufactures.

BASIC MAINTENANCE ON TILE ROOFS.

1. Valleys
2. Half gables/ chimneys
3. Hips and Ridging
4. Water channels of the tiles 

The valleys, half gables and chimney flashing need to be checked and cleaned regularly. Just cleaning or sweeping over the top of the tiles will not be productive. The valley, half gable and chimney tiles need to be removed. The underlying flashings properly cleaned and the settings redone. Any clinched over nails removed and the flashing secured properly with posi self tapping screws Any rust found on the valleys or flashings treated and then painted. The water channels of the tiles checked and cleaned. The tiles can then be replaced ensuring a good fit.

SEE DETAILED SECTIONS ON THE DIFFERENT ROOF TYPES

A visual inspection by a competent experienced person or professional will be able to determine any sagging or distortion in the tile patterns that may lead to future problems which if addressed timelessly would prevent serious damages. Cracks in the walls or along the beam filling or around the sprockets would also indicate movement and is another sign of latent defects that should be attended to. Sagging along any of the hip or ridge lines or the face of any roof section should also be checked out by a competent professional. A visual sight along the profile of the roof tiles can determine movement of the roof structure. If initially tiled properly and in straight lines with even batten spacing's any degree of movement will be indicated by the degree of distortion or curved lines. The distortion or curve would identify the direction of movement and or any potential danger or not. This would also be picked up on any adjoining gables Cracked mortar and missing collars and fine cracks should be attended to. Chimney over flashing should be checked and re grouted or sealed as needed.

VERY IMPORTANT NOTE

Sealing over the tiles with any type of waterproofing method or compound is not recommended at all. In all probability this will not stop any roof leaks but will actually aggravate the problem in the long term. It is always imperative to investigate and discover the root cause of any water leak the roof may have and rectify the underlying cause. Patching over a problem section is never recommended. Determining and rectifying the root cause is very important for short and long term solutions.

 
 

Slate Roofs

Types of Slate Roofs

CONVENTIONAL

Different size slates. Batten spacing's vary depending on the length of the slates Various width sizes are also used. Effectively the slates overlap allowing for more than a double layer of slate coverage. The bottom slate extends completely under the slate above it as well as approximately 70mm under the one above that. This allows for a watertight covering If the timber structure is installed precisely and accurately the hips would miter and then soakers fitted between the mitered sections for a watertight seal. If there is a discrepancy along the junctions a saddle ridge is installed with a waterproofing underlay below the saddle ridge the same as would be done at the apex along all the ridge sections. The valleys should also be installed with soakers between each row of slates along the length of the valley. Fitting flat or inverted ridge valleys on a slate roof is not the best solution.

PETER LOUW METHOD

This type of installation allows for a single layer of slates with the overlap from the lower slate extending slightly under the slate above it. The resulting gaps between the slates are then compensated and made water proof with a underlay that runs between the slates. This roof is as waterproof or as good as the underlay. The underlay has a limited lifespan. Once the underlay deteriorates it has to be replaced. Considering the cost between the underlay and the additional slates required to install a conventional slate roof we recommend that the conventional method be used.

FIBRE CEMENT OR EVERITE SLATE ROOF SYSTEM.

Generally there is a standard size of 400 x 600mm. The slates are laid in the same manner as a conventional slate roof. These slates have an additional copper rivet fitted on the lower end of each slate to reduce curling. They are obtainable in a variety of colours and can also be re painted when needed.

Maintenance of Slate Roofs

FIBRE CEMENT OR EVERITE SLATE ROOF SYSTEM.

Generally there is a standard size of 400 x 600mm. The slates are laid in the same manner as a conventional slate roof. These slates have an additional copper rivet fitted on the lower end of each slate to reduce curling. They are obtainable in a variety of colours and can also be re painted when needed.

PETER LOUW SLATE ROOFS

The slate roofs need to be regularly checked. Broken and cracked slates need to be replaced. The lower copper rivet needs to be removed. The damaged fiber cement slates are removed with a slate ripper. The new fiber cement slates are secured with wire clips and the lower copper rivet replaced. Any damaged or perished underlay along the hips or ridging has to be replaced as detailed above Slate roofs and valleys should be kept clean and free of any debris. Overhanging trees should be cut back and away from the roof slopes.

FIBRE CEMENT SLATE ROOFS

The slate roofs need to be regularly checked. Broken and cracked slates need to be replaced. The lower copper rivet needs to be removed The damaged fibre cement slates are removed with a slate ripper. The new fibre cement slates are secured with wire clips and the lower copper rivet replaced. Any damaged or perished underlay along the hips or ridging has to be replaced as detailed above.

 
 

Iron Roofs

IRON ROOFS COME IN A VARIETY OF SHAPES AND DESIGNS. CORRUGATED IRON, IBR, BROWNBULT, WIDE SPAN AND OTHER PROFILES IN A VARIETY OF MATERIALS

The main thing to consider on an iron roof is rust and the fixings or securing's. Iron roofs also require a reasonable runoff. A minimal slope that allows ponding is not acceptable. The sheeting should be kept clean and free of any debris that may cause blockages and restrict water run off. Sealing the side laps of the sheeting is not recommended. The front laps should never be sealed. Any water seeping in at these places will cause accelerated rust and deteriorate the sheeting

SEE GALLERY SECTION ON HOW INAPPROPRIATE SEALING CAUSES ACCELERATED RUST ON IRON ROOFS.

The roofing screws need to be checked, attempting to hammer the screws down often leads to the sheeting being dented which in turn causes ponding around the screw allowing for water seepage and inflow ultimately deteriorating the timbers and rusting the sheeting. Proper repair self tapping posi screws should be used to secure the sheeting, as well as at places additional stitching screws fitted between the purloins. Pop rivets are not recommended. All flashings and over flashings should be checked regularly. Exposed sheeting should be of an adequate thickness.

 

Waterproofing

MAINTENANCE ON: TORCH ON

Regular maintenance is required. The roofs should be kept clean and free of any debris. Especially by and along the outlets. The outlets should be large enough to allow the dispersion of volumes of water even in a cloud burst or hardy rains. Any cracks and lifting along the joints and parapets should be addressed immediately. The waterproofing should be coated regularly with a bitumen based aluminium reflective coating. This effectively prevent the sun from deteriorating and cracking the waterproofing.

ACRYLIC

The acrylic water proofing should be kept clean and free of any debris The acrylic waterproofing should be recoated regularly with a good quality acrylic water proofing compound