Thursday, September 28, 2017

Omegabuild Guide to building a timber frame Carport or Canopy

Omegabuild Guide to building a timber frame Carport or Canopy

1.   Polycarbonate sheet, trimmed and taped.
2.   Glazing bars to join the sheets.
3.   F Section to finish and secure the edges.
4.   Fixing buttons to secure larger sheets between the bars.
5.   Sheet closure for the bottom edge.
6.   Butyl Foilband flashing (polycarbonate compatible) to seal the top against a wall.
7.   Guttering.

·         10mm structured polycarbonate is the cheapest material for an open sided carport or pergola.
·         If you are are building a large structure you could also consider 16mm or thicker. 
·          For a conservatory, choose the thickest you can afford giving extra insulation. 
·          Use the widest sheet you can comfortably handle, this will reduce the number of glazing bars required keeping costs down.  It is very easy to underestimate the size and difficulty of handling sheets particularly in windy conditions.

We recommend rafters at 600mm or 700mm centres depending on the width of sheet used (maximum width 1830mm or 2100mm).  This will support the sheet on both edges and twice in between.  F Section is used to start and finish the carport and glazing bars used to connect the sheets.  Fixing buttons are used on the support rafters between the glazing bars.  Decide which sheet you would like then check available widths.  Ideally we would suggest your Timber to be at 610mm centres (10mm Clear or bronze haze ( Borg)) or 710mm centres (all other polycarbonate).
Omegabuild can supply a timber supported lean to kit with the components you require. It is based on 1050mm sheets and can be supplied with 10 twinwall ,16 triplewall or 25mm polycarbonate sheets.  To see the range of sizes we offer have a look on our website
If you would prefer to not use timber rafters we also have a range of self supported lean to roof kits.  To find out more have a look on our website
If you would like to have  a complete aluminium kit with legs and guttering Omega offers their Smart canopy and carport system. To find out more have a look at our website
PVCu corrugated sheets are normally fixed to purlins. Screw down bars do not work on purlins.  Though not recommended by manufacturers, snap down bars can be used to cross purlins, Timber rafters would be better, then any bar can be used and with more fixings. The important point here is the number of fixings points holding your roof down.  E.g. a 3m projection with purlins may only have 4 fixings points per bar, imagine a sudden gust of wind underneath that. Better too many fixings than not enough.
The manufacturers minimum recommended pitch is 5°, to cover adequate drainage , this is a fall of 265mm over 3000mm. This is a minimum , we would recommend a fall of 500mm.
Both ends of the polycarbonate sheet should be taped to stop dust and insects entering the flutes.  Breather tape should be used at the bottom allowing air as it expands and contracts to exit and enter the flutes.  Omegabuild can supply the sheets trimmed and taped.
Please visit our website for photographs and sheet comparisons.
A roof supporting beam that runs from top to bottom down the slope.

A roof supporting beam that runs horizontally, sometimes supporting rafters or  
running between them.

Glazing bar   
Joins two sheets of polycarbonate together.

Self supporting   
Acts as a rafter as well, needing no additional support.

Timber supported 
Needs to sit on a timber support.
The Snap down bar has an aluminium base which is screwed onto the timber and has a plastic snap on capping Although it is not recommended this bar can be used crossing purlins particularly when replacing corrugated sheet. Please ensure you check the Omegabuild fitting guides for the maximum distances allowed between cross purlins. If in doubt place timber noggins between the cross purlins to create a virtual rafter.

The  Screw down aluminium bar has a rubber base and can only be used on a complete rafter. The capping is all aluminium with an aluminium screw cover  cap and it is screwed into the rafter. This is the stronger and more professional method suitable for all thickness’s of polycarbonate and even single glazed glass.

Edge bar            
A bar used on the sides to finish off with polycarbonate on one side only.
Sometimes an adapted main bar and not always available from every manufacturer.

Upvc Edge trim /F section           
Converts a main snap down bar into an edge bar.

F section            
Used instead of an edge bar. Useful with its leg that can be used down or up if against a wall. Plastic  or aluminium depending on thickness.

Breather tape   
Put on the bottom of the sheet allowing  air in and out of the flutes as it expands and contracts while  keeping dust and insects out.

Sheet Closure            
Plastic U section with a drip that protects the breather tape and stops water running up the underside of the sheet.

Thursday, September 29, 2016

Polycarbonate Sheets for Roofing

POLYCARBONATE  SHEETS are a glass-like, virtually unbreakable plastic that makes it perfect for the high stress environment required by today’s jet fighter canopies. These properties also make polycarbonate the perfect material for canopies and carports since it allows the light transmission benefits of glass, but with added safety of being virtually unbreakable. They are very flexible and come in a range of sizes and shapes and styles such as corrugated roofing sheets.

Did you know? Although polycarbonate is virtually an unbreakable polymer, the quality and process of polycarbonate during manufacturing is critical to the final result and to overall performance.

Polycarbonate panels have UV protection that protects them from harmful UV rays and harsh weather, allowing quality and durability for years of use. Looking at the polycarbonate with the naked eye, it's impossible to determine if the panel has UV protection or not, this can be only determined by testing in a laboratory.
A new panel of polycarbonate without UV protection may look shiny and feel sturdy at first, but overtime and as a result of exposure to sunlight and weather conditions the polycarbonate will change its physical and visible characteristics.

Before you're choosing your polycarbonate roofing supplier it is important to pay attention to the specifications and features of the polycarbonate panels and to make sure they are manufactured by a known and trusted manufacturer. This is very important aspect in order to ensure quality, durability and safety of your polycarbonate roof for many years to come.
You should not be tempted by slightly lower prices for a poor quality polycarbonate greenhouse.

Another benefit of UV protected panels refers to your furnishings and furniture. Since the panels have UV protection they also protect your car and belongings from harmful UV rays

Tuesday, August 09, 2016

How to reduce traffic noise

I live on a busy road. How do I reduce traffic noise?

Omega supplies a wide range of secondary glazing solutions which if correctly fitted can significantly reduce traffic noise.
ü Fit secondary glazing ideally 150-200mm away from your existing glass
ü Use a different thickness of secondary glazing to your primary window. Most primary glazing is 4mm so 6mm secondary glazing is usually a good option
ü Specialist acoustic laminate glass  is very effective
ü Ensure when fitted it is well sealed
There are a number of other things that can help too.
§  Ensure your existing windows are well fitted and sealed. If possible good quality double or triple glazing will help.
§  If you are in a listed property there are firms that will refurbish sash windows
§  Fit internal shutters, well sealed along the edges and frame (price £700-2000 a pair)
§  Endure your cavity walls and roof are well insulated.
§  Fitted carpets and soft furnishings can help muffle sound

Phone: 01769574426

Tuesday, November 17, 2015

Lift Out Panel Installation

This is a  video showing how to fit a Omega Traditional lift out secondary glazing unit. It is supplied preglazed with toughened or laminated glass and is a great way of providing sound and heat insulation on your windows. For further info go to

Friday, January 25, 2013

Polycarbonate Greenhouses- Are they better than glass?

Many gardeners in Europe have been using greenhouse polycarbonate sheets rather than glass for years but British gardeners have really only started to see the light.

There are many myths about the limitations of polycarbonate but the reality is with good quality UV coatings it can offer distinct advantages over the traditional glass glazed greenhouse.

How many of you have witnessed a misdirected football or a confused pheasant hit and shatter a glass panel? It is surprisingly easy to break a greenhouse glass panel. My father had a slightly loose glass door panel on his aluminium greenhouse. Every time there were high winds or he shut the door carelessly it would fall out and shatter. He replaced it with a UV protected, polycarbonate 4 years ago and it’s still as good as new.  In addition to this it is much safer particularily for the elderly or if young children are around.

Insulation is another factor to consider especially with some of the cold winters we have had over recent years.  The U value represents the  thermal insulation of a material . The lower it is the better as it shows the heat loss per sq metre. 4mm thick greenhouse glass has a U value of 6.0 W/M2K whereas 4mm clear multiwall polycarbonate has a U value of 3.8W/M2K. This means you should be able to save money by not having to have your greenhouse heater on for quite so long.

The weight of the polycarbonate is much lighter than the equivalent with glass . A  2’ x 4’ panel of glass weighs about 7.44 kg whereas the same size in 4mm multiwall polycarbonate  weighs only 0.6 kg. This means your structure doesn’t need to be as bulky or costly. If you are worried about  panels “blowing” out ensure you have a good base and invest in high quality galvanised W clips to hold the  panels in place.

This all sounds great but are there any catches?
You may have heard that polycarbonate goes yellow or cloudy.  If you buy a  good quality branded polycarbonate such as Palram or Marlon it has a UV protective layer on the outside which stops the UV from discolouring the polycarbonate. These greenhouse glazing sheets will come with a 10 year guarantee to give you peace of mind.

What about mould or algae? You need to put aluminium tape over the cut edges of your polycarbonate to stop moisture getting in and algae spreading into it .

What about the light for your plants? 4mm glass has a light transmission of approximately 95% whereas 4mm multiwall polycarbonate is 82-88%. This is slightly lower but it does have the advantage that the layers in the polycarbonate will diffuse the light. This is good for many plants.
 So as you can see polycarbonate has many advantages for the keen gardener. If you want to try it contact a reputable supplier that uses high quality branded polycarbonate.

For further information please call the team at Omega Roofing Plastics on 01769574426,email us at or go to our website