Blog

Parapet Wall Chimney Pots Being Dressed With EPDM Single Ply Rubber

This gives an idea as to what we were up against. Our specification for this new flat roof was to strip the old roof, apply insulation and re-roof using EPDM rubber. Just what we were going to do with the parapet walls and chimneys was always going to be up for debate and, as part of the pricing, we had discussed that a Provisional Costs (PC) sum should be put to one side to deal with the renovation of this area.

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Thermal Bridging of an Insulated Flat Roof, Through the Front Fascia

In this video I explain problems with insulating a roof using the warm and cold roof construction methods. Whatever new flat roof covering you choose, e.g. EPDM rubber, Kemper, Liquid Rubber Triflex, if the specification of the insulation is not correct you could have problems which could include rotting joists.

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Lead on Flat Roofs Oxidising

The lead on these flat roofs is beginning to oxidise and break up before the end of its lifespan. Lead on roofs and flat roofs are supposed to last 30 to 60 years with very little maintenance. What we see more and more is lack of ventilation and roofs sweating; this problem is happening because of the lack of ventilation under the lead flashings.

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Blocked Gulleys On Old Asphalt Flat Roofs

You must maintain your flat roof as blockages of the drainage system can cause big problems. Leaking flat roofs are often caused by water backing up and overflowing. Even new flat roofs sometimes leak, as the pressure of the water build up finds the smallest of problems with the roof. This is why we like using the liquid roofing system for new flat roofs, as they don’t have any joints that can leak.

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Cold Flat Roof Construction Explained

Hopefully this video will help explain the difference between cold flat roof construction and warm flat roof construction, this video shows detailed drawings on how a cold flat roof is constructed. I link to two other videos, one on warm flat roof construction and one that’s an in depth comparison between cold and warm flat roofs also showing thermal imaging of poorly performing, insulated flat roofs. The animation program used was Sketch Up with lots of section cuts.

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