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Preparing an Old Roof To Receive an EPDM Rubber Membrane

I’d like to take you through the correct preparation of an old roof, through to how we insulates it and cover it with an EPDM rubber membrane. This is a standard procedure for commercial flat roofing.

First it is necessary to strip the old covering that was green mineral felt covering and you can see we have exposed all the old decking. We will do a small amount of repairs to the old decking – actually its in quite good condition especially because we are going over it with insulation we will be covering the decking with boards.

Its slight unevenness is not a problem. You can see here we are removing the old roofing system In the background I’m there filling in the old skylight area so no rubbish falls down there. The windows are open because we are going to take them out and the new roof and insulation will be higher and the windows will be replaced.

On this project on a commercial building in Winston Salem you can see that behind the windows we have dust sheets because this is going to be a warm roof the insulation is going to be on top of the old roof decking and we will insulate behind the gutter board. To do this we have to remove the old guttering and gutter board thus exposing the gap we clean between and fill with roof insulation. Insulation goes between the top of the wall to bottom of the decking continuing the insulation properties all the way around the roof. We have to work quickly so we can get the roof covered before the end of the day.

In the next part of the video you will see me working on the skylight, the others are laying the vapor barrier from other end of the roof. We are using a high quality vapor barrier, this is generally called a vapor control system – It controls vapor that transfers thought it into the insulation.

This particular vapor control system is strong and will span gaps of over 125mm. The roof decking is not good but the vapor barrier will bridge problems. Note the detailing of the vapor control system – It goes up and around the skylight, it goes up the walls and by the time this vapor control is down this roof will be waterproof.

Now we fix down the roof insulation using thermally broken fixings, again the roof insulation is fitted tight around the skylight around the walls and any gaps are filled using foam. The curb for the skylight goes over the insulation, making sure there is no chance of thermal bridging.

Gaps around the outside are filled with foam and the insulation is above the window cill where the old windows would have never opened while the insulation has been going down. We backfilled between joists, primed all joist ends, primed the fascia board that goes over the top and now the customer’s chosen to use timber because this is an old property

We could have used UPVC, however this looks better – in fact it looks very very nice now. This is just a step back a stage or two because we’re going to show you what we’ve actually done before when we put the facia back on. I’ve insulated behind the facia and I’m actually painting that later, once we’ve covered it with the vapor barrier which comes across the decking up and over-the-top, and with a piece of treated timber we will but the installation directly up against the roof.

Later we will fill between the joists below and as you can see I’m painting the gutter board that goes over the top of the insulation. The EPDM membrane has been down for quite some time and it’s been able to relax in the creases and we see the roof insulation fixings. The insulation is level, the vapor barrier comes up around and laps over the top so we are now ready to glue down the EPDM roof system.

Now the EPDM is down we carefully clean the roofing system – but very very slow so it’s very important for us to get it perfectly smooth. When all the lead flashings are on you can see the guttering looks good against the wood facial board and you can see where it holds back the insulation. Towards the back you can see the black UPVC termination strip and the extra height of the insulation makes this new flat roof around 125mm higher than the old roof.

So to finish let’s just have a look on the roof – I think the first thing that becomes apparent when you go onto a new EPDM roof especially when theres insulation under it are all the marks showing through this is part of the EPDM roofing system. We see all the joints between the insulation, the slight marks where the EPDM was packed for traveling and it has a slight ridge.

The EPDM rubber will shrink back a little but none of this is detrimental to the EPDM roof. If I apply pressure I can dent the surface, so don’t walk on it  with sharp shoes

Thanks for watching my name is Eric Hunton from Winston Salem Flat Roofing. I hope this has helped you.

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Installing Copper Flashing – Is it really the long term solution? Pt 2

roof flashing in CincyFlashing has to be installed over areas of the roof where shingles alone will not provide protection against water seepage. Chimney flashing is one of the most important details of a successful residential roof system. The best and most effective way to protect your roof is through using a flashing.

Tin coated steel and galvanized steel will eventually rust and corrode. The most common color for flashing is a silver-grey, which comes from aluminum or galvanized steel. Aluminum and galvanized steel are less expensive, but still effective choices. Aluminum is considered 50-year compatible, is much less costly and non-toxic, but is still not as easy to field fabricate as galvanized steel, copper and lead. Daman Pearse from Cincinnati Roofing Contractors has been using copper for many years and believes it has its place in repairing certain types of roof. A lot of residential roofs in the Cincinnati area use copper flashing. Prices for metals like aluminum, lead, and copper can go much higher. Steel can be recycled, and levels of scrapped steel are far lower than copper.

Metal roof flashing is critical for standing seam roof applications because the metal roof is not attached using screws along the panels. Copper roofing panels are available in traditional double-lock standing seam, flat seam and ornamental diamond panels. The vertical lip to the left will be locked into the standing seam copper roof to be installed along the entire porch roof. You can use a board laid flat on the roofing to get a better idea of the real slope of the roof, as shingles can be lumpy. The apron is cleated at its upper edge and is joined to the copper roof pans with a transverse seam. You may have to nail the lower edge to the roof to hold it flat.

Derek Pearse writes more about Copper Flashing on his website

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Installing Copper Flashing – Is it really the long term solution? Pt1

copper flashingA properly installed copper roof will likely be the last roof ever installed on the building. When professionally designed and installed, a copper roof can provide an economical, long-term roofing solution. When properly designed and installed, a copper roof provides an economical, long-term roofing solution that is also both impressive and attractive. A properly installed metal roof will last well over fifty years and easily pay for its higher initial cost. Pomaville Roofing has over 60 years experience repairing, fabricating, and installing copper roofing materials. Copper sheet metal has been and continues to be a beautiful, durable roofing material.

Ken Barlow from Rochester Roofing Contractors is of the opinion that when it come to Rochester roofing projects the application of copper flashing is well worth the investment. On one of their recent projects you could see that the apron flashing is the first piece of flashing installed along the bottom side of the chimney. You can see the white base flashing rising from the roof up under the rusting counter flashing. The roofer starts at the lower spot where the flat roof meets the wall or chimney and installs flashing and shingles alternately, working upward along the roof. Typical applications include valley flashing, base flashing, counter flashing, and chimneyflashing. Enough to remove the old rusty flashing out of the chimney, but not further. The tiles must be removed to expose the original flashing metal, the metal must be fully removed, and then the new metal must be installed.

Roof flashing is the process of adding a thin layer of waterproof material to a roof that keeps water from entering your home and roof. Flashing is used to prevent water from getting under the roof and damaging the roof decking as well as the ceiling below it. There are many areas for water to penetrate on your roof.

Special thanks to Ken Barlow

For more information on Rochester Roofing Contractors

753 W Main St
Suite 2
Rochester, NY

585 360 0174

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