Common low-slope roofing systems
- EPDM (rubber): a single-ply synthetic rubber membrane, usually black, that is fully adhered or mechanically fastened.
- TPO: a single-ply white or light-gray membrane with heat-welded seams that reflects summer sun.
- Modified bitumen: asphalt-based rolled roofing in one or more layers, often used on porch roofs and smaller sections.
Drainage comes first
A low-slope roof has to move water off steadily. Standing water, called ponding, ages any membrane faster. A replacement is the right moment to correct drainage: tapered insulation boards can build slope toward scuppers, internal drains or gutters, and clogged or undersized outlets can be enlarged.
Flashing at walls, parapets and chimneys
Most problems on flat roofs start at the edges and penetrations. The membrane needs to turn up walls and parapets and be terminated and counter-flashed properly, and every chimney, vent stack and roof hatch needs its own detail. Ask the contractor to walk you through how each one will be handled.
Access and logistics on tight city lots
Older Springfield neighborhoods often mean narrow driveways and houses close together. Ask where the dumpster will go and whether the city needs a permit for one placed on the street. If you own a multi-family house, give tenants notice about noise, porch access and parking. Massachusetts Home Improvement Contractor rules cover owner-occupied homes of up to four units, which includes most owner-occupied triple-deckers.
Porch roofs and additions
Plenty of homes have a shingled main roof plus low-slope porch roofs or a rear addition. Doing those sections at the same time lets the crew tie the flashing together where the low roof meets the wall. More on this in our triple-decker roof guide.
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Call (888) 292-4916Questions homeowners ask
Should a triple-decker roof be EPDM or TPO?
Both are widely used. TPO's light color reflects summer heat and its seams are heat-welded; EPDM has a long track record and is simple to detail on small roofs. The right choice depends on drainage, insulation and what the contractor installs most often.
Do low-slope roofs need a permit in Springfield?
Generally yes. Replacing a roof covering requires a building permit in Massachusetts regardless of the roofing type, and the contractor usually files it.
Can the porch roofs be done at the same time?
Usually, and it often makes sense: the crew, dumpster and permit are already in place, and new flashing can tie the porch roofs into the main roof properly.